Water Management and Sustainable Eco-system- S17
DEPICTING ECOLOGICAL CONSEQUENCES THROUGH LANDSCAPE INDICATOR APPROACH
Sangitarani Nayak S K Srivastava Dr R N Sankhua Sandhyarani Sahoo
Objectives
Patch analysis of the landscape of PCMC FOUR INDICATORS: Landscape characteristics (% forest cover) Human stresses (population change & road/stream crossings) Riparian characteristics (%crop land within 30m of streams) Physical attributes (elev. range)
ATTILA - interface with GIS
character istics Metrics
General and special listed tool
METHODOLOGY Aster DEM
Digital data
Toposheet
Geo Referencing
ATTILA Avenue run
Landscape Characteristics
Riparian Characteristics
Human Stressor
Physical Charcteristics
Analysis
Final Result
INDICES FOR LANDSCAPE
LANDSCAPE CHARACTERISTICS
PARAMETERS OF LANDSCAPE
% of stream length adjacent Ragc – to cropland Ragp to pasture Ragt - to all agricultural use Rbar - to barren
Landscape Characteristics AgpSL - Agri pasture on steep slopes
Rfor - to forest
AgtSL - Total agri LU on steep slopes
Rurb - to urban
Usr1SL - User defined class on steep
Rusr1 - to user defined class
slopes
Rwetl - to wetland Rnat - to all natural land use Rhum - % of stream length adjacent to all human land use
METRICS
Land Cover Proportion : Pfor = forest area/ (total area − area of water), or % of terrestrial area that has forest cover.
Diversity Shannon−Wiener (H) H= -∑ Pi * ln Pi Shannon-Wiener (H’)
Slope Metrics- Amount of agriculture on steep slopes –an indicator of water quality Diversity Metrics - quantify landscape composition Patch Metrics - generated for forest cover & give an indication of forest health
Simpson (C) C= 1- ∑ Pi2 Simple (S) S=m m = number of diff land cover types Pi = proportion of land cover type i
RIPARIAN CHARACTERISTICS
HUMAN CHARACTERISTICS
P_LOAD - Phosphorus loading N_LOAD - Nitrogen loading POPDENS – Pop. density POPCHG - Change in total population PCTIA_LC - Impervious cover, based on land use RDDENS* - Road density by road class RDLEN* - Total road length by class STXRD* - No of road/stream crossings by road class PCTIA_RD - %of imp cover, based on road density STPRD* - Length of roads in close proximity to streams (user defined distance) by class
PHYSICAL CHARACTERISTICS PRCPRNG - Precipitation range PRCPMIN – Min precipitation PRCPMAX – Max precipitation PRCPMEAN - Avg precipitation PRCPSTD- SD of precipitation ELEVRNG - Elev range ELEVMIN - Min elevation ELEVMAX – Max elevation ELEVMEAN - Avg elevation ELEVSTD - Std dev of elevation SITE_ELEV - Elev at point locations SLPRNG - Slope range SLPMIN - Min slope SLPMAX – Max slope SLPMEAN - Avg slope SLPSTD - Std deviation of slope STRMDENS* - Stream density STRMLEN* - Total stream length
GRID Z VALUES AT POINTS
INTERSECTION CHARACTERISTICS AT POINTS
OUTCOMES OF THE STUDY CLASS_NAME
SHAPE_LE_1
AREA
PERIMETER
Water
58004.762
1311061.18
58004.76
Residential
1884033.08
58924531.01
1884033.08
Other Agri
1201268.520
17597536.79
1201268.52
Cropland
3348653.458
56502937.31
3348653.45
Forest
611895.851
8452367.66
611895.85
Scrubland
942408.591
27042895.61
942408.59
INDEX RESULTS Name
N_INDEX
N_INDEX_A
PFOR
PFOR_A
PSHRB
Bhosari
18.67
5820400.0
3.57
1113600.
15.10
Chinchwad
18.24
6954000.0
9.36
3568100.
8.88
Dehu rd
41.39
15840800.0
3.98
1525400.
37.41
Military area
88.23
289400.0
5.30
17400.0
82.92
Pimpri
7.44
1748400.0
2.15
505200.0
5.29
Nigdi
11.91
4134400.0
4.23
1467100.0
7.68
And many more indices‌. CONCLUSION landscape indicators/metrics - quantitative measurements of env/ecosystem vulnerability for a watershed can be analyzed.