THE FORMATION PROCESS AND CARBON CYCLING OF PEATLANDS
Peatlands are the largest natural terrestrial carbon store.
Peat forms very slowly, about 1mm of peat a year. Peat actually creates an anaerobic environment, in the sense that it preserves much ecological information and history. The different depths of the peat layers allow the dates and changes in the environment to be measured, as well as recording the remains of the plants and insects that lived there. (Gearey et al., 2010)
Peat accumulates under wet, anoxic, highly acidic, and nutrient-poor conditions. Indeed, with its anaerobic environment, the peat preserves much ecological information and history.
Soil builds up a very thick organic layer composed of partially decomposed litter.
Carpet
Young, Partially Decomposed Peat (Large, Recognizable Fibers+Plant Matter)
Medium-Term Decomposition
Oldest Peat Layer (Finer Structure Of Fibers+Recongnizable Plant Matters)
SHALLOW OPEN WATER
Decomposing algae and mooses initiate peat formation at the edges of shallow open water.
EDGE ACCUMULATION
This decomposing matter provides a substrate for larger plants like grasses, sedges, and rushes to take hold.
Accumulated peat eventually begins to become domed at the deepest areas.
It is generally found over acidic bedrock in places where rainfall exceeds the loss of water through evaporation and plant transpiration.
Such conditions favour the growth of bog-mosses and cottongrasses, which do not break down when they die but slowly accumulate as peat.
Living Sphagnum Moss
Of Dead Sphagnum Moss
RAISED BOG
Layers of peat create a barrier between the bog vegetation and the groundwater and the bog becomes increasingly acidic and low in nutrients.
A. RAISED BOG
Acidic bedrock 1 1 2 2 4 4 3 3 CO2 CO2 C C C C CO2 - ACIDIC BEDROCK - LIVING SPHAGNUM MOSS HIGH RAINWATER & WATER TABLES COLD AND ACIDIC CONDITIONS Low oxygen Microbial decomposition is reduced
B. BLANKET BOG
PEAT O2 1 MILLIMETRE PEAT = 1 YEAR
MOSSES Cells
SPHAGNUM
Sphagnum capillifolium
Sphagnum fallax
Sphagnum fuscum
Sphagnum subnitens
Sphagnum tenellum
Sphagnum fimbriatum
BLANKET BOG RESTORATION
Some conventional approaches to peatland restoration have been developed today, water management is one of the most fundamental and critical aspects of this approach.
There are restrictions and site-specific approaches based on topographical and ecological conditions, so as to avoid disturbing the environment and enhance health.
Use all other previously excavated vegetation to cover bare peat.
“HYDROLOGY” “REPROFILING" 1 2 3
The first step in the process of peatland restoration is to improve the site’s natural water balance. This generally involves reducing drainage rates by blocking channels with ‘leaky dams’ made from peat, heather bales, stone or wood.
Erosion of peat often creates steep slopes where vegetation struggles to take hold. The process of reprofiling involves peeling back the vegetation at the top of the slope with a digger, then reducing the slope angle to less than 45 degrees.
Restoration works Detectable changes in water quality, water table depth and peat stabilization by vegetation
A
Treating surfaces with Heather Bale
Across bare peat and mineral soil, heather bale is installed bunds to reduce erosion from water flow and wind.
Wet tolerant vegetation becoming dominant Good hydrological and ecological functionality possible
Creating better-growing conditions for seed Replanting with Sphagnum beads B C
Bare peat oxidises, creating extremely acidic conditions, so the lime and fertilizer are applied to create better growing conditions for the seed.
Then the land is covered with a mix of grass and heather seed to create a micro-climate for the seeds to germinate.
Each tiny bead contains several small strands of moss. The gel helps to weigh down the moss and aid application on the moors.
Stone Dam
Timber Dam
Peat Dam
Peat gully eroded to mineral base Low point in centre of trap Max.height 1M Min.height 0.75M 600-2000 600-2000 500-800 Covering of vegetated turves on exposed peat to prevent oxidisation Peat dam must be installed lower than the base of the grip. Max. water level Ouline of grip behind dam GROUND LEVEL 1000 100 100 1000 1000 2000 250 Planks should be embedded into sides of the gully by 500mm and should be driven straight down to avoid creating erosion crack in the gully side.
Heather Bale Lime, fertiliser and grass seed
A B C
Sphagnum beads
Random gritstone 150-400MM 750mm minimum 60° 750-1000mm(max) Timber slow-the-flow baffle>3 (M) 0 - 1Years 2-5 Years 10-15 Years 20-50 Years TIMEFRAME FOR RESTORATION
“REVEGETATION
"
SITE LOCATION: CAIRNGORMS NATIONAL PARK
The Cairngorm National Park is a national park in Scotland, where peat is found in much of the National Park, particularly on the high ground.
The acidic bedrock of the park with its low evaporation provides the base conditions for widespread peat formation, especially blanket bogs.
In the Cairngorms National Park, summers are cool; winters are long, cold, snowy, and windy. The climatic and geological conditions of the park are favorable for peat formation.
Grantown on-spey Ballater Aviemore Site Kingussie Glenlivet Dinnet Braemar Blair Atholl Killiecrankle To Aberfeldy To Spean Bridge To Perth To Banchory To Aberdeen To Aberlour To Inverness To Forres Newtonmore Laggan Dalwhinnie Pitlochry i Visitscotland Icentre Local Inforamtion Icentre City Town Area Woodland Area Trunk Road Road Railway National Cycle Route National Park Boundary Inland Rock Bog Woodland Grassland N 0 50KM 10 20 30 40 57°N 3°W
650 625 640 615 690 730 670 710 750 660 635 700 740 680 720 760 780 655 630 645 620 695 735 675 715 755 775 665 705 745 685 725 765 785 770 0 1100M 1100M 900 720 540 360 180 0 900 720 540 360 180 Direction of water flow Ben Macdui Ski Centre Cairn Gorm AlltCoirean t-Sneachda A A B B Site Boundary Peatland Path Buiding Average precipitation Mean daily maximum Mean daily minimum AVERAGE TEMPERATURES AND PRECIPITATION Jan. Mar. Jun. Oct. Feb. May. Sept. Apr. Aug. Jul. Nov. Dec. Sunny Partly Cloudy Overcast Snowy Day Average Snowfall (cm) 12 14 16 12 11 SNOWY DAY Jan. Mar. Jun. Oct. Feb. May. Sept. Apr. Aug. Jul. Nov. Dec. CLOUDY, SUNNY, AND PRECIPITATION DAYS 0 >0 >3 >7 >12 >17 >24 >31 >39(mph) N 750 500 S E W WIND
The project seeks to promote public access to conserved peatlands and experience the tradition of peat without destroying them.
Translating the hidden natural process of peatland and choreographing the relationship between peat, mosses, water, senses, and tradition. Through the landscape interventions, visitors experience how the peatland changes in different areas of the bog in different seasons and weather.
Cutting
Casting
Flaying Species
Revegetation Reprofiling CULTURE
Drying NATURE PEATLANDS
Hydrology SNOWCOVER
Carbon Loss
Cause additional warming Snow cover and depth decrease Local reductions in water table
A. Commercial exploitation and tradition of peat or fuel
B. Reduction in carbon fixation by peatland vegetation due to graze
C. Peat erosion due to changing climate and watertable
D. Peat drainage due to agriculture
CO2
MONTANE SCRUB
DESIGN STRATEGY
Today, peatlands are being degraded as the demand for agriculture and urban expansion grows. The carbon stored in the soil is released into the atmosphere, contributing to local climate change. Therefore, we are facing the conflict between emotional attachment to turf burning and climate improvement.
The Irish Times (2022). ‘Burning Turf: a tradition that deserves to die’, The Week,(May), pp.15.
CONFLICT OF TRADITIONAL PEAT USE
DEGRADATION OF PEATLANDS
Through the landscape interventions of a peatland, the project seeks to promote public access and interactive education without destroying the peatland. My design consists of 6 zones, responding to the historical engagement with peatland, and remanaging the relationship between peat, moss, water, senses, and traditions.
HYDROLOGICAL SYSTEM
0 50 25 100 200M N
4. Traversing The Bog
3. Moss Nursery
1. Grounded
6. Sunken Square
5. Peat Burning
MASTERPLAN
2. Heather Field
4. Traversing The Bog
3. Moss Nursery
1. Grounded
6. Sunken Square
5. Peat Burning
Cairn Gorm
Ben Macdui
2. Heather Field
VEGETATION
Dam Aquatic vegetation (Mosses and Herb) Rewetting Phase 1 Rewetting Phase 2 Native Species Grassland Herb and shrub Transition Zone Heather Management A nursery is established to cultivate mosses for the revegetation. The water system aims to reverse the drying out of the peatland, rewetting the blanket bogs. These dams which have different directions and lengths can be compacted and knitted into the peatland, forming different landscapes and rhythms. The water flow in this area is blocked by some dams, creating pools that trap the peat in the flow. Cyclical peat cutting seems to be a useful way to manage the heather In this way the narrow strip matrix not only creates a visual landscape, but also maintains the vitality of the heather and a good ecosystem. The rewetting of the peatland allows mosses and cotton grasses to reemerge as dominant species, facilitating peat formation and accumulation. The area where the grassland meets the wetland is buffered with native plants to avoid the expansion of herbaceous vegetation.
MANAGEMENT
Timber Dam
Peat Dam
Stone Dam
Grounded begins the project by stepping underground to reveal the presence and meaning of the peat hidden beneath the surface turf, organized by a number of ramps and passages embedded in the ground.
The walls of the passages use peat-cutting traces as texture. The layers, texture, and smell of the peat are perceptible, revealing the wildness and history of the peat.
As the ramp goes below ground, we can see the peat hidden beneath the top sedge layer of the bog.
We walk through a layer of peat and touch the real material.
The experience of walking through a foggy bog is unique, with soaked boots.
1. GROUNDED
On the walls we can see the peat layers that have accumulated over time.
HISTORICAL INFORMATION TAIRSGEIR'S CUTTING MARKS Tairsgear 0 1500 Years 1200 0 300 600 900 -1.5M
HEATHER FIELD
The heathland is a space shaped by time. Through three periodic cuts of heather, rich vertical layers are shaped by the undulations of the terrain.
Visitors zigzag through the heather fields via walking paths, experiencing the seasonal management of heather.
Controlling heather growth through three cycles of heather cutting, which can shape the layers of heather at different times, heights and forms.
HEATHER LIFE CYCLE STAGES
PIONEER 3-6 years
BUILDING Up to 15 or 20 years
MATURE Over 20 years.
DEGENERATE Over 25 years
Cutting the heather not only prolongs the life of the heather and relieves the drying out of the peat, but also creates an environment conducive to the survival of species such as grouse.
2.
Cutting with Narrow Strip Matrix can reduces the dryness of peatlands, promoting the survival of animals such as grouse.
Managing this area through cyclical heather cutting
Controlled growth of heather through cycles of heather cutting, which creates a wave-like heather landscape.
The cut heather is transported to moss nurseries and areas in need of revegetation to help the plants grow.
HEATHER CUTTING A1 B1 C1 A2 B2 C2 A3 A B C 0 20 40years
Dry and unfrozen heather Heather
Peat stabilisation
bale
The heather should be dry and unfrozen at the time of harvest and subsequently stored in boxes to dry. The heather bales can be used in revegetation.
NURSERY
The raised circular path allows visitors to observe the staff at work in the nursery, transforming the session into a performance. Native mosses species are used for cultivation and the harvested mosses are used for revegetation within the site.
3. MOSS
Dried heather helps to create a stable growing environment.
Harvesting mature moss for site revegetation.
SOWING
Using native mosses species for cultivation.
HARVESTING
NURTURING
Sphagnum capillifolium
Sphagnum fallax Sphagnum fuscum
Sphagnum subnitens
Sphagnum tenellum
Sphagnum fimbriatum
The traditional method of peat cutting is converted into a process of building a walking path in which visitors can participate. Peat from the site is used for burning, giving people the opportunity to still experience the peat burning tradition in a protected peatland, evoking a slowly dying history.
The burning site, partially wrapped by the topography, emphasizes the strong connection of our historical fuel to the land.
Cutting
The traditional way of cutting peat becomes a process in which visitors are involved in shaping the landscape and the trail is changed over time by this approach.
5. PEAT BURNING
Here we can experience a declining tradition that is using peat as a fuel.
Peat burning has an earthy perfume of ancient moss.
Our cuts are part of constructing the landscape and the path.
Stack the peat cut by visitors to protect it from rain and to promote drying.
Stage 1
Burning
Stage 2
Burning Cutting
Drying Drying
The sunken square resembles a crack in the peat, and people are guided into the sunken area with a ramp. The benches are embedded in the slope, providing a theater-like viewing atmosphere and a resting area. People can gather, educate, and do other activities in this flexible public space.
The seat rises up the slope to provide an interactive experience with the peatland.
6. SUNKEN SQUARE
The cut surface retains the historical texture
Formwork Covers
Formwork Covers
Filling the frame
Peat + 6% cement
A pneumatic tamper
Walls with layers
Steel reinforcement
The durability of rammed earth can be enhanced by the addition of stabilisers. such as cement.
The frame for the walls are consisting of four parallel plywood panels.
Showing the layers and textures of stable peat with the way of rammed earth walls.
1 2
Concrete base
3 4
RAMMED EARTH WALL
WINSPIT'S NOMADIC NURSERY
Lowland Calcareous Grasslands Restoration
Site: Winspit Quarry, Dorset, UK Jan 2023 - Aug 2023
In the last centuries, with the escalated effects of humanity in manipulating wild areas, the collective vision for urban construction permanently alters the natural environment in which it is excavated. The historical and present quarrying reveals the exploitation, codependency, and power dynamic between humans and nature. Under competing uses and shrinking land in Dorset, these abandoned quarries seem to be an opportunity for decreasing lowland calcareous grasslands, reversing the historical loss of this vital habitat.
The project proposes transforming Winspit Quarry into a nursery to redescribe, utilize, and stabilize past industrial scarring, acting as an anchor to expand habitats in Dorset. This nursery facilitates the missing ecological interactions and provides a mediate across the complex geological and material transformation of the post-industrial ruins. It develops a strategy to promote a return to local material and habitat cycles, converting the migration process of stone and seed dispersal to habitat recolonization. Tangible and intangible resources of light, wind, vegetation, agriculture, land, material, labour, and biodiversity are remanaged in this project. The production of this semi-nature habitat patches the ecological gaps, progresses from the old wild to the new, and manages other wildlife and ecosystems at large.
Winspit Quarry is an abandoned quarry on the cliffs on the Isle of Purbeck, Dorset, England.
The Dorset area where Winspit Quarry sits was once home to hundreds of quarries during the eighteenth century, most of which are now abandoned.
From the 18th century, quarrying and agricultural activities continued to cause habitat loss, especially lowland calcareous grasslands.
0 1 4 2.5 5.5 6.5 0.5 3.5 2 5 1.5 4.5 3 6 7 (KM) 0 1 4 2.5 5.5 6.5 0.5 3.5 2 5 1.5 4.5 3 6 7 (KM)
WINSPIT QUARRY Building Path & Road Inland Water Watercourse Mean High Water Line Mean Low Water Line Contour Line Cliff or Slope Line West Man Worth Matravers Langton Matravers Weston Farm Seacombe Quarry Swanworth Quarry Disused Quarries Disused Quarry St Aldhelm's Chapel St Aldhelm's Quarry Winspit Quarry Winspit Quarry London East Man Seacombe Cliff 50°35' 21" N 2°01' 23" W Champman's Pool Dancing Ledge Blackers Hole
(Reader,
15 C 11,500 BCE – 4000 BCE 18 C 1940 1900 1939 - 1945 World War II Defense Base Medieval Medieval Terraces Morden Farming Mesolithic Period Notional Trust 2020 Quarrying ceased at Winspit Quarrying started at Winspit 1.1.2 Timeline
Winspit Quarry Site Location & Context Climbing in Winspit, 2022
Woodland Clearance Nature Human Activity Traditional Grazing Agricultural Intensification
Winspit Quarry
1910)
Of
World War II Defense Base
01 02
Winspit Quarry is privately owned but the public is allowed to access the quarry.
PathtoSeacombeCliff
In Winspit, large cliffside quarries have been opened on both sides of the valley. Historic farming and quarrying activities have created many unique landscape heritages.
SEMI-NATURAL HABITATS: Lowland Calcareous Grassland
Why Do We Support Grasslands Instead Of Woodland?
CO2
CARBON OFF-SETTING
PathfromWorthMatravers
POLLINATION
MAINTAIN SPECIES DIVERSITY
Grassland
Lowland Calcareous Grassland
SUBSTRATE (thin, well-drained lime-rich soils) CLIMATE (cooler, moister)
SCRUB ENCROACHMENT HABITAT FRAGMENTATION
In Dorset, over 97% Lowland Calcareous Grassland was lost between 1793 and 1983.
FORMATION DEGRADATION
LOWLAND CALCAREOUS GRASSLAND
INTENSIFICATION OF AGRICULTURE GRASSLAND ABANDONMENT LANDUSE CHANGE
GRAZING Mechanical Production Chemical Inputs Re-Seeding Quarrying Agriculture
TODAY
Distribution Of Lowland Calcareous Grass In England
SITE PLAN
Lack grazing
WOODLAND CLEARANCE
SPECIES DEPLETION
PathtoStAldhelm'sChapel
PathfromWorthMatravers West Quarry East Quarry Medieval Terraces West Man East Man Building Remains of Quarry Path & Road Medieval Terraces Watercourse High Water Line Low Water Line Contour Line Debris West Quarry East Quarry Landscapes
a high richness and diversity of species
invertebrates. 0 50 100 150 200M 0 50 100 150 200M
Seabirds Reptiles Pollinators
Calcareous
Shrub & Tree Pasture Path & Road Water Stone Working Area Remains
Supporting
including
Bat Cattle
Bare Portland Rock
GEOLOGY: Lime-Rich Substrate & Natural Succession
CLIMATE ANALYSIS
PathfromWorthMatravers
Portland Stone can provide a lime-rich substrate for the creation of calcareous grasslands.
Sunpath & Shade Area
Years of mining have reshaped landforms and topography. The rich microtopography also brings about changes in microclimate, with light trails and shadow ranges producing variations throughout the year.
Historical Mining Process
PathtoSeacombeCliff
Some pioneer plants already grow on the bare surface through natural succession, which means biological communities can recover by themselves without anthropogenic disturbance. However, it requires 50-100 years to restore the abandoned quarries to a stable state. (Tang and Shen, 2013)
Historic quarrying activities have left many traces and have permanently altered the landscape of the site.
The data and microclimate zones will inform subsequent restoration and intervention methods to create a stable growing environment for plants.
West Man East Man The Parrallel Bands Portland Cherty Series Marls Marls Marls Marls Hounstout Clays The Massive Bed Superficial Deposits Portland Freestone Portland Cherty member Limestone & Rocks Limestone & Mudstone Artificial Ground STONE MINING AREA STONE WORKING AREA STONE TRANSPORT AREA Rutway
Gibbet Cranes Mine Cart Apophygate Column
June December
June December Wind Rose 0.9M\S 11.9°C 46% 0M\S 7.6°C 44% 0M\S 13.6°C 1.3M\S 11.9°C 0M\S 8.4°C 44% 0.5M\S 7.6°C 41% 0M\S, 6.6°C. 42% 0M\S, 7°C, 50% 0.5M\S, 7.3°C, 43% 0.8M\S 14.2°C 44% Wind Speed (M\S) Land Surface Temperature (°C) Humidity (%)
PORTLAND STONE The Main Quarried Stone PORTLAND SAND KIMERIDGE CLAY N S +90° 9:00 5:00 7:00 11:00 13:00 11:00 15:00 9:00 17:00 7:00 5:00 19:00 13:00 15:00 17:00 E W N S +90° 9 00 17 00 11 00 15 00 13 00 9 00 11 00 13 00 15 00 17 00 E W
Wind
bare
Shaded
Sunny vegetation surface Caves Windy Zone Land Surface Temperature On-Site Measurements Wind LOW HIGH 0 50 100 150 200M Micro-Climate Zone
Hourly Data: Wind Speed (m/s) Yearly
Rosa Sunny
portland stone surface
bare portland stone surface
STRATEGY
In 2022, The National Trust purchased this area with the aim of returning the farm fields to wildlife-friendly grassland and creating a continuous wildlife corridor.
The ownership change of this area seems to be a new opportunity to negotiate the ecology, the local community, and the visitors.
WINSPIT QUARRY NURSERY
NURSERY ESTABLISHMENT
Climate
Sunlight & Shade
Wind
Soil moisture storage
Landform
Moving unstable rock
Constructing microterrain
Growth Blocks
Soil
Vegetation
This project proposes transforming Winspit quarry into a nursery for lowland calcareous grasslands restoration. It develops a strategy to promote a return to local material and the creation of a new habitat cycle including nursery establishment, grow blocks migration, wind dispersal, and habitat creation and management.
Tangible and intangible resources such as light, wind, material, labour, and biodiversity are remanaged in this cycle.
Maintaining high species richness
Scrub and other aggressive species management
(Keep the sward shorter than 10 cm)
HABITAT MANAGEMENT
Grassland establishment typically takes 3 to 5 years. (Ashwood, 2015)
Cutting
Carbonate
Adjusting mineral substrate
-Calcareous mineral wastes
-Weathered industrial wastes
-Require nutrient addition
Material transformation
HABITAT CREATION
The patches create gaps for new plants to establish and then microhabitats linked into a whole.
Seed Bank: Local Source
-Wildflowers
-Grasses
Cultivation Strategy
-Turf inoculants
-Natural colonisation
-Green-hay strewing
-Seeding
Surrounding National Trust Land
National Trust member, visitor - Wider range
Light grazing
Aviod seed predators
Working with local farming communities & visitors
GROW BLOCKS MIGRATION WIND DISPERAL
Mature Nursery Become a new seed bank for wider area.
Organic matter Seed Mix
PLANTING PALETTE
Animal-dispersed & Wind-dispersal Species
Flowering Time
Dispersal Time
Spring (Mar., Apr., May.) Summer (Jun., Jul., Aug.) Autumn (Sep., Oct. Nov.) Winter (Dec., Jan.,Feb.)
Sea Campion (Silene uniflora)
Selfheal (Prunella vulgaris)
Sea aster (Tripolium pannonicum)
Thrift (Armeria maritima)
Yellow-rattle (Rhinanthus minor)
Procumbent Pearlwort (Sigina procumbens L.)
Douglas iris iris douglasiana) (Hyacinthoides non-scripta)
Rock rose (Helianthemum Collection)
Flowering Seed Ripening Division & Planting Spring Summer Autumn Winter
Ribwort Plantain (Plantago lanceolata)
Rock samphire (Crithmum maritimum)
Rock stonecrop (Sedum reflexum)
Source: Ashwood, F.
Yarrow (Achillea millefolium )
Kidney Vetch (Anthyllis vulneraria)
Oxeye Daisy (Leucanthemum vulgare)
Bird's foot trefoil (Lotus corniculatus)
Rough Hawkbit (Leontodon hispidus)
Sainfoin (Onobrychis viciifolia)
As the grasslands dispersal depending on animals and wind through seeds, there is a seasonal cycle for Seed collection and sowing, which brings seasonal experiences for visitors.
Sea Carrot (Daucus carota subsp
Golden Samphire (limbarda crithmoides (l.) dumort)
Carlina (carline thistle)
Common Knapweed (Centaurea nigra) (Medicago lupulina)
Brassica montana Brassica montana)
Cynosurus cristatus (Cynosurus cristatus)
Red fescue (Festuca rubra)
Sheep’s-fescue (Festuca ovina)
Yellow Oat-grass (Trisetum flavescens)
Narrow-leaved Meadow-grass (Poa angustifolia)
Sweet vernal grass (Anthoxanthum odoratum)
-Forbs -Grasses
asexually 0 0 0 0 1m 1m 0.5m 0.5m 0 0.5m Sedum reflexum Crithmum maritimum Plantago lanceolata Helianthemum Collection Hyacinthoides non-scripta Iris douglasiana Anthoxanthum odoratum Poa angustifolia Trisetum flavescens Festuca ovina Festuca rubra Cynosurus cristatus Brassica montana Medicago lupulina Centaurea nigra Carline thistle Llimbarda crithmoides (l.) dumort Daucus carota subsp Onobrychis viciifolia Leontodon hispidus Lotus corniculatus Leucanthemum vulgare Anthyllis vulneraria Achillea millefolium Sigina procumbens Rhinanthus minor Armeria maritima Tripolium pannonicum Prunella vulgaris Silene uniflora Jan.WINTER SPRING SUMMER Mar. Jun. Feb. May. Sept. Apr. Aug. Jul. Dec.
Seasonal Phases Reproduce
(2006)
Grassland Creation And Management In Land Regeneration Functional Ecology. [Online] Available at: https:// www.forestresearch.gov. uk/publications/bestpractice-guidance-for-landregeneration/ (Accessed: 20 August 2023).
Lowland Calcareous
The range of long-distance seed dispersal by wind is 80m, the key factors promoting the spread distance are:
Weed Speed
C. Seed Accumulation
Plants that depend on wind dispersal become an anchor point once they have settled, spontaneously expanding to the periphery. In this project, Wind dispersal will be the main method for wider habitat creation on the National Trust land.
The mean angle of dispersal is closely related to the prevailing wind direction. Moreover, the extent of wind dispersal of seeds is related to species characteristics, wind speed, and height of dispersal.
Adjusting wind dispersal efficiencythrough the intervention of landform, material and vegetation. Gentle
Wind Dispersal Sequence
The habitat can be continually expanded through wind dispersal, but this is dependent on long-term management. The establishment of an anchor point consists of a pre-preparation, a growth period, and a management period, with different environmental measures being taken at each stage to help establish the microhabitat.
Short-term intensive grazing 3 Years
Seed mixes can be sown in spring (Mar./ Apr.) or Autumn (Sep./ Oct.)
6 Weeks for allowing the soil to settle
During the dry season of autumn and winter, there are strong winds. Use 0.5 cattle or 2.5 sheep ha-1 yr-1 (Ashwood, 2015)
SPRING SUMMER AUTUMN WINTER
High
A.
B. Strong Updrafts
Strong Updrafts Seed Accumulation High Wind Speed Low Wind Speed Seed Dispersal Range Landscape interventions & Wind Dispersal Efficiency 80M Range of Long distance seed dispersal Wind direction affects seed dispersal
Slope Gap WInd
Diffusion
Tectonic Slopes Hills Curved Channel Surface Roughness Steep Slope Wall Stack WIND
Straight Channel
Channel
DISPERSAL
Phase 1: Mosaic Creation Phase 2: Topography & Soil Adjustment
Phase 5: Wind pollination & seed dispersal
The trampled patches
Phase 3: Seeding
Phase 6: Grazing Management
Phase 4: Wind Barrier & Avoid herbivory
Long- Term Grazing
PROJECT
SITE
Winspit Quarry, Dorset, UK
AIMS
Re-Introduce Native Lowland Calcareous Grasslands
AMBITIONS
- New form of economy
- Reversing the trend of persistent habitat losses
- A medium of ecological, historical, and material transformation of the post-industrial ruins
WHO IS IT FOR Locals Visitors National Trust
SYSTEM
The historical quarrying process in the quarry will be transformed into a restoration process. It will be an experiential journey for visitors, including stone cutting, growth block processing, and transplanting. By capitalizing on the natural features of the site, the project will create different planting areas and biotopes to support wider habitat creation.
Since calcareous grasslands do not require high moisture. A main channel will run through the site, using the existing caves to reduce evaporation. In this way, the irrigation system including traditional methods and caves is conducive to water saving and weed reduction.
0 10 20 30 40 50M 1 2 3 6 5 4 MASTERPLAN
Cross Section Planting Area Water Path
1. Stratum
2. Cave Pool
3. Planting Field
4. Vertical Garden
5. Rocky Nursery
EXPERIENTIAL TOUR
6. Debris Garden
IRRIGATION
Stone Cutting
Growth Block & Seed Production
Olla Irrigation Pot
Dew Pond
Irrigation Line
Seeds Collection
Stratum Zone & Planting Field Zone
Gentle terrain & stable microclimate
Grass
Seeds can be transported outside of animals or ingestion by animals.
Phase1: Sowing seed mixtures
A mixture of wildflower and grass seeds are sown at the same time. The species planted tend to be reproduce asexually and animaldispersal.
Vertical Garden
Wildflower
Phase2: Light grazing management Phase3: Transplanting
Long-term management through grazing is essential for maintaining this semi-natural Habitats.(Ashwood, 2015) And the cattles and sheeps will also serve as seed dispersal agents.
Wildflower Grass
Grazing and human activity will carry seeds over greater distances. In addition, the seeding stone will capture some seeds for dispersal.
Steep terrain & stable microclimate
Phase1: Sowing seed mixtures of Wildflower & Grass
Planting species that depend on wind for seed dispersal in the area.
Rocky Nursery & Platform Zone
Phase2: Mowing management
The steep and complex terrain is not suitable for grazing management. Mowing may be suitable for small sites and those on gentle slopes (Ashwood, 2015).
Phase3: Transplanting
Vertical Garden's planting height enhances the wind dispersal of seeds. In addition, the seeding stone will be placed to capture some seeds for transplant.
Windy microclimate
Phase1: Sowing seed mixtures of Annual Nurse Grass & native wild flowers
Annual Nurse Grass can provide rapid initial cover, and its vigor will declines with time, allowing wildflower species sown. (Mitchley et al., 1996)
Phase2: Mowing management Phase3: Transplanting
After mowing, cuttings should be removed from the site. (Ashwood, 2015) The height of sward should kept at 10cm.
The mature stone column and cutted sward with seeds can be used for transplanting on other sites.
Lolium perenne
0 10 20 30 40 50M
Wildflower Nurse Grass Grass
PLANTING PLAN AND MANAGEMENT METHODS
The planting map shows the planting types and management methods such as grazing and mowing in different zones with varied conditions.
In the Stratum zone, the project organizes a route to the geological layers and disused caves which reveals different quarrying techniques and various types of stone and geological properties. Therefore, the movement of visitors forms a process of perception and constructs a space outlining geological information and historical traces, crossing the deep time of nature.
A walkway was built in the quarry face to extend the accessibility of different heights of caves. Moreover, the magnificent rock face and cave scenery will be reflected in the water, promoting a visual experience and ambience.
RECONNECTING THE CAVES
The Winspit Quarry is an area of significance in terms of geology, flora, and fauna. The reconnection of caves and platforms with varying elevations offers people all-round perspectives to enjoy the scenery and reveal the entanglement between historical quarrying activity and habitat.
STRATA LAYERS
0 15M 0 5 10 15 20 25M Section A
The platform points in two directions, one for nature recovery of a wide area and one for the abandoned East Quarry.
Part of the decayed rock face is cut and polished to visually reveal the hidden geological layers.
Existing
STRATUM
The main irrigation channel takes the visitors into the zone, forming a circuit connecting the main points. The gentle channel winds through the bare Portland stone ground to the disused cave which is transformed into a pool for irrigation.
The Planting Field is divided by four passages embedded in the ground, where the light conditions affect the planting types. The passages are designed based on the light-shadow boundaries at various seasonal and daily times. The sunlight will move between different passages. The different angles of light and height of views intertwine to form a series of sensory sequences.
CAVE POOL & PLANTING
FIELD
35M 0 15M 0 5 10 15 20 25M
B B 19:00 Jun 13:00 Jun 13:00 Dec 9:00 Dec 19:00 Jun 13:00 Jun 13:00 Dec 9:00 Dec
Section
Irrigation System
Olla Irrigation Pot
Dew Pond
SUNKEN PATHS
CAVE POOL
Olla Irrigation Pot
The water is released slowly and continuously into the soil due to the porous walls of the clay(dry soil has a greater capacity to absorb water). In this way, the evaporation is reduced and weeds germinate less easily because the topsoil remains dry.
Path & Steps
Dew Pond
Dew ponds were created to provide drinking water for livestock. They are used in areas where a natural supply of surface water may not be readily available. The most of water comes from rainfall, a little from condensing dew.
Stone sett
Puddled clay
Lime ash
Boulders Gravel
Concrete haunching Concrete pad
10-20M
Planting Substrate
Species of calcareous grassland require good drainage and unfertile soil. The waste rock and sand from the quarry will be reused as part of the planting substrate, which would not bring unknown seeds and rebuild native vegetation communities.
100% Stone
30% Soil+70% Stone
70% Soil+30% Grit
Crushed Waste Stone
Portland Stone
Drainage
Step 1: Excavate the dish shape
Step 3: Pave with stone sett
Step 4: Filled with Water
Step 2: Line with lime ash and puddled clay
gravel 10-20Φ
Rolled
Steel Edging Steel Edging Metal Nail Gravel Nail Sand Portland Stone Portland Stone Portland Stone Coarse sand compacted Hardcore well consolidated Hardcore Portland Stone 1000mm 200 200 200 350
pipe
Stone Edge
Nature
CAVE POOL & PLANTING FIELD: Technical Detail
The project will clear an area that is cluttered with quarrying waste stone, and replace it with a stone terrace for planting. The sunlight reflection will be promoted by the polished rock face, creating a suitable microclimate.
Light Reflectance Value (lrv) of Portland Stone: 78.48%
Sunlight Angle in June
LIGHT
REFLECTION
The polished stone surface enhances the refractive effect. By adjusting the angle of the cliff, the refraction of the light can enhance the light in the shadows, promoting the growth of plants in the planting areas.
VERTICAL GARDEN & ROCKY NURSERY 35M 0 15M 0 5 10 15 20 25M Section C C Smooth Surface Rough Surface
85°
COLUMN MATRIX
VERTICAL GARDEN & ROCKY NURSERY: Technical Detail
Column Matrix
The matrix consists of columns, each of which is enclosed by Portland stone. It will attenuate wind speeds, promoting plant settlement and growth.
Planting Method: Nurse Grass
Species of calcareous grassland require good drainage and unfertile soil. The waste rock and sand from the quarry will be reused as part of the planting substrate, which will not bring unknown seeds and rebuild native vegetation communities. In addition, annual Nurse Grass can provide rapid initial cover, and its vigor will decline with time, allowing wildflower species to be sown. (Mitchley et al., 1996)
In time, as the biome builds, the columns tilt with the wind and become the track and anchor point for the wind dispersal of seeds.
Compacted
Elevated planting height will promote the wind spread of seeds. As a natural retaining struct, it generates slopes and platforms for planting, allowing accessibility and management. Rope
Stone Column
Portland Stone Block
Portland Stone Planting Substrate
Wind
Lolium perenne
Nurse Grass
Notch
Vertical Garden-Stone
Vertical Garden-Timber
Block Stone
Portland Stone
Hardcore Insitu concrete
Mortar Joints
Drainage pipe
Drainage hole
granular fill
Stone Planting Column
Stones are laid against each other to form a column. with the wind bringing seeds to the surface and holes, plants are grown in crevices and holes drilled in the stones.
In the Debris Garden, the project converts the remnant of the plant where Portland Stone was processed into workshops and shop spaces of seeds and species of calcareous grasslands.
The debris area will be transformed into a species archive where visitors will observe the rich variety of individual species that make up the calcareous grassland.
7-10Φ Gravel
Sub base granular material Drainage pipe
100% Stone 30% Soil+70% Stone 70% Soil+30% Grit Gravel
DEBRIS GARDEN
Portland Stone
Concrete Footing
1000mm 500mm
Steel Wire Wood Post 500mm
Stone Stack
Stone Wall
Existing Ruins
Drystone Wall Species Archive
Sand Bed
Portland Stone slabs Slats nailed & plugged
Portland Stone
The drystone wall is constructed from Portland stone, which presents a retaining facade of interlocking stones.
Gravel
Copestone Throughstone Lift Foundation Hearting
PET PARK UNDER THE VIADUCT
Site: Guiyang, China
Jun 2020 - Sep 2020
People lack disposable public spaces in cities with ever-increasing density. Meanwhile, as the city develops, more pets start living in the city. Since people and dogs share the same urban space, the contradiction between people and dogs becomes intensified. Meanwhile, people from different backgrounds hold different opinions on pet dogs, resulting in contradictions. The project is located under the Wandong overpass, which is the largest pet market in Guiyang. However, it was left behind during the rapid urban renewal process and has become a scar on the city. Based on the space under the overpass and the original commercial foundation of the site, it plans to transform the space into a continuous, flexible, and open space, to combine the commercial space with the civic space, so as to provide services for the four surrounding communities in the tight urban space. A pet park dividing level, region, and time is included in the plan, aiming at renewing the negative urban space under the overpass creating more perspective communication between people and dogs, and creating a community culture to alleviate the contradiction between people and dogs.
People lack disposable public spaces in cities with everincreasing density. Meanwhile, as the city develops, more pets start living in the city. Since people and dogs share the same urban space, the
61.2 MILLION
2019 Number of pet breeaders in China
36.7MILLION
2019 Number of dog breeaders in China
55 MILLION
2019 Number of pet dogs in China
contradiction between people and dogs becomes intensified. At the same time, people from different backgrounds hold different opinions on pet dogs, resulting in contradictions.
Compared with human beings, dogs need a relatively larger activity space, which is also uncontrollable. At the same time, the activity requirements and the relationship between dog owners, citizens and dogs are also different.
The surrounding communities are intensified, lacking of urban public space. Meanwhile, greening and activity space are lacked in the community, resulting in conflicts between people and dogs.
The project is located under the Wandong Viaduct, which was the largest pet market in Guiyang. However, it was left behind during the rapid urban renewal process and has become a scar on the city.
Commercial shops were scattered there in the past, engaging in pets, catering, calligraphy and painting, flowers and plants. However, the internal traffic was not accessible, and the venue was narrow and closed, giving people a sense of chaos.
2750 households 174dogs LACK OF URBAN PUBLIC SPACE green space for each inhabitant 9.25m*2 DOG&HUAMN DOG DOG OWNER RESIDENT SITE ANALYSIS A B C D WANDONG BRIDGE MESSY & OLD PET SHOP -Guiyang Journal SAFETY CLEAN CLEAN NOISY RULE COMMUNICATION UNDERSTANDING Human-Dog LACK OF NATUAL ENVIRONMENT FUNCTION REPETITION & LOW ATTRACTION SEPARATION OF SURROUNDING COMUNITIES DOG'S OUTDOOR SPACE FOOD MARKET P SHOPS GROUND FLOOR UNDERGROUND FLOOR WANDONG BRIDGE Commercial Composition Road Network THE NUMBER OF DOGS Expenditure on dog Large dog Small dog Human SCALE- DOG & HUMAN 2012-2019 Chinese pet market -SHANGWU- -ZHENGYI- -HENTETotal area: 30000M*2 Greening rate: 35% Residential Outdoor Space Public Space Total area: 40000M*2 Greening rate: 25% Total area: 41000M*2 Greening rate: 25% Catering Pet Shop Flower Shop Art Shop Total area: 34000M*2 Greening rate: 30%
-XIHUNEIGNBORHOOD
0 2012 (10MILLION) (YEAR) 201320142015201620172018 500 1000 1500 2000 2500 Dog Food 39.4% Train 0.5% Foster 1.6% Health Products 2.5% Bathe 5.8% Vaccines 9% Clinic 10% Articles11.7% Dog Snacks 19.5% A B C D 60-70CM 40CM 2M Specific Length of Leash 300MM 600MM Much Exercise Little Exercise THE NUMBER OF DOGS ROSE
DESIGN ANALYSIS
Based on the space under the viaduct and the original conditions of the site, it plans to transform the space into a continuous, flexible, and open space, combining the commercial space with the civic space. The park will provide services for the four surrounding communities in the tight urban space. A pet park dividing level, region, and time is included in the plan, aiming at renewing the negative urban space under the viaduct and promoting communication between people and dogs.
Pedestrain Network Sight Function Owenership PEOPLE LARGE DOGS SMALL DOGS PEOPLE Dog Pedestrain Network Ecological Greening Seating Commercial Service Restauran Pet Shop Painting and Calligrahy Shop Flower Shop
People All day Samll dogs and People 7:00-9:00 18:00-21:00 Use leash Large dogs All day MASTER PLAN
Wangdong Bridge
Festuca elata [Florencene and Fruit Stage] Apr.Aug.
VEGETATION ANALYSIS
Festuca elata [Florencene and Fruit Stage] Apr.-Aug.
Melinis nerviglumis [Florencene Mar.-Aug. [Fruit Stage ] Oct.
Stage Sept.-Nov.
SECTION DETAIL
Euonymus japonicus [Florencene ] Jun.-Jul. [Fruit Stage Sept.-Oct. Malus halliana [Florencene ] Mar.-Apr. [Fruit Stage Sept.-Oct.
RENDERING
Festuca elata [Florencene and Fruit Stage] Apr.Aug.
Cycas revoluta [Florencene Jun.-Jul.
Festuca elata [Florencene and Fruit Stage] Apr.-Aug.
Miscanthus [Florencene Aug.-Sept. [Fruit Stage Sept.-Nov.
Cedrus deodara [Florencene Oct.-Sept. [Fruit Stage ] Next Oct. Cycas revoluta [Florencene Jun.-Jul.
Cycas revoluta [Florencene ] Jun.-Jul.
Malus halliana [Florencene ] Mar.-Apr. [Fruit Stage Sept.-Oct.
Zelkova serrata [Florencene ] Apr. [Fruit Stage Sept.-Nov.
Large Dog Area means an activity area that is open 24 hours a day for large dogs and their owners only. The site includes a sunken activity space. It provides for pet training and daily activities, for which activity and training facilities as well as drinking water have been constructed. The sunken elevation difference not only ensures safety, but also provides a good view for the public to watch the activities of dogs.
PET PARK LARGE DOG AREA
SECTION a a Waterscape Gentle Slope Lawn Entrance Activity Lawn Stroll in the Forest Activity Facilities
Festuca elata [Florencene and Fruit Stage] Apr.Aug. Miscanthus [Florencene Aug.-Sept. [Fruit Stage Sept.-Nov. Miscanthus [Florencene ] Aug.-Sept. [Fruit Stage Sept.-Nov. Cycas revoluta [Florencene Jun.-Jul. Triadica sebifera [Florencene May.-Jun. [Fruit Stage Sept.-Oct. Thermo-Ash hardwood Impounding reservior Pump Chamber PVC drainage outlet Concrete drainage pipe Backfill with 1\2 clean exist soil, 1\4 top soil, 1\4 organic Sub-grade compact Reinforced steel bar Reinforced concrete Lighting Reinforce concrete Brick Sand 3” Mortar Setting Bed 1”-2”Mortar Setting Bed 6” Thick Stone 6” Thick Stone 4”-6” Concrete Slab Zelkova serrata [Florencene Apr. [Fruit Stage ] Sept.-Nov. Triadica sebifera [Florencene ] May.-Jun. [Fruit Stage Sept.-Oct. Miscanthus [Florencene Aug.-Sept. [Fruit Stage ] Sept.-Nov. Meliosma cuneifolia [Florencene Jun. [Fruit Stage ] Sept.-Nov. Miscanthus [Florencene ] Aug.-Sept. [Fruit Stage Sept.-Nov. Miscanthus [Florencene Aug.-Sept. [Fruit
a-a SUNKEN ACTIVITY AREA
Melinis nerviglumis [Florencene ] Mar.-Aug. [Fruit
Meliosma cuneifolia [Florencene Jun. [Fruit Stage Sept.-Nov.
Miscanthus [Florencene ] Aug.-Sept. [Fruit Stage Sept.-Nov.
Miscanthus [Florencene Aug.-Sept. [Fruit Stage Sept.-Nov. Miscanthus [Florencene Aug.-Sept. [Fruit Stage ] Sept.-Nov.
Meliosma cuneifolia [Florencene Jun. [Fruit Stage Sept.-Nov.
The Small Dogs Activity Area is an area for small dogs that is open at set times. Small dogs will share this space with the public. The site includes water and grassy sloped activity areas with built in facilities for pets and children. A vegetated buffer for the busy city street and site was also constructed through natural means to create a quiet activity area.
SECTION
SMALL DOG AREA
VEGETATION ANALYSIS
Island
Lawn Waterscape Entrance Entrance b b
SECTION DETAIL RENDERING Activity
Activity
Festuca elata [Florencene and Fruit Stage] Apr.Aug. Festuca elata [Florencene and Fruit Stage] Apr.Aug. Festuca elata [Florencene and Fruit Stage] Apr.Aug. Triadica sebifera [Florencene ] May.-Jun. [Fruit Stage Sept.-Oct. Stone Paver 4”-6” Concrete Slab Precast concrete karb on motar bed b-b 1”-2” Mortar Setting Bed 6” Thick Stone In-suit concrete Irrigation facilities Water pipe Concrete drainage pipe Backfill with 1\2 clean exist soil, 1\4 top soil, 1\4 organic Sand based structual soil 5%Slope 10%Subdrains Sub-grade compact Triadica sebifera [Florencene May.-Jun. [Fruit Stage Sept.-Oct. Miscanthus [Florencene ] Aug.-Sept. [Fruit Stage Sept.-Nov.
Stage Oct. Cedrus deodara [Florencene Oct.-Sept. [Fruit Stage ] Next Oct. Cycas revoluta [Florencene Jun.-Jul. Malus halliana [Florencene ] Mar.-Apr. [Fruit Stage Sept.-Oct. Malus halliana [Florencene Mar.-Apr. [Fruit Stage ] Sept.-Oct. Malus halliana [Florencene Mar.-Apr. [Fruit Stage Sept.-Oct. Cycas revoluta [Florencene Jun.-Jul. Cycas revoluta [Florencene Jun.-Jul. Cycas revoluta [Florencene Jun.-Jul. Melinis nerviglumis [Florencene ] Mar.-Aug. [Fruit Stage Oct. Euonymus japonicus [Florencene ] Jun.-Jul. [Fruit Stage Sept.-Oct. Euonymus japonicus [Florencene ] Jun.-Jul. [Fruit Stage Sept.-Oct. Euonymus japonicus [Florencene Jun.-Jul. [Fruit Stage Sept.-Oct. Zelkova serrata [Florencene Apr. [Fruit Stage Sept.-Nov. Zelkova serrata [Florencene ] Apr. [Fruit Stage Sept.-Nov. Zelkova serrata [Florencene Apr. [Fruit Stage ] Sept.-Nov. GRASS SLOPE ACTIVITY AREA PET PARK
ACTIVITY AREA
The markets extend the commercial space outwards while facing citizens with a more open commercial form.
DESIGN ANALYSIS RENDERING
The platform on the second floor has connected the site space, which enriches the viewing angle and activity spaces.
The space under the viaduct has been transformed into a continuous, flexible, and open space, combining commercial space with civic space, as well as connecting the venues through more connected footpaths, including children's activities, sports areas, recreational spaces, markets, and commerce shops.
Moreover, it has increased vegetation and natural space, connects with the pet park and revitalizes the space under the concrete bridge.
AREAMARKET ANTIQUE & ART SHOP EXERCISE AREA REST GREEN LAND DOG WALKWAY RESTURANT LEVEL 2 PLATFORM REST PLATFORM CHILDREN ACTIVE AREA RESTURANT WANDONG BRIDGE CHILDREN ACTIVE AREA
ACTIVE AREAPET SHOP WANDONG BRIDGE
PEDESTRIAN STREET
-BUSINESS
-CHILDREN
Function Business Sight Road network Pet Shop Shop Underground Floor Sight Flower Shop Market Ground Floor Art Shop Second Floor CHILDREN ACTIVITY AREA MARKET