Rain Water Harvesting in School Building - DUTEP Water Challenge 2019 Project Proposal

PEMERINTAH PROVINSI DKI JAKARTA

PROPOSAL PROJECT RAIN WATER HARVESTING IN JAKARTA SCHOOL

PREPARED FOR :

DUTEP WATER CHALLENGE Jakarta, September 2019

CLIMATE CHANGE CONTROL TEAM

AMBIA a kamil │RICKY janus m gultom │RONALD tirta mulya│ siti nur JANNAH

climate change control

3C

AMBIA a. kamil DEPARTMENT FOR PUBLIC HOUSING AND SETTLEMENT AREA SUB DEPARTMENT OF NORTH JAKARTA

RICKY janus m gultom DEPARTMENT FOR PUBLIC ROAD

.

RONALD tirta mulya REGIONAL DEVELOPMENT AND PLANNING BOARD URBAN INFRASTRUCTURE AND ENVIRONMENT DIVISION

siti nur JANNAH DEPARTMENT OF HUMAN SETTLEMENT, SPATIAL PLANNING AND LAND AUTHORITY SUB DEPARTMENT OF EAST JAKARTA

BACKGROUND In terms of seasons, the Indonesian region is generally known for two seasons, namely the dry season and the rainy season. Rainfall in the Indonesian region is quite high, which is 2,000 - 4,000 mm / year, potentially becoming an alternative source of clean water. The absence of adequate rainwater management in most parts of Indonesia has resulted in an increase in the frequency of flooding during the rainy season and the threat of water shortages or droughts during the dry season.

The absence of adequate rainwater management in most parts of Indonesia has resulted in an increase in the frequency of flooding during the rainy season and the threat of water shortages or droughts during the dry season.

On the other hand with population growth, the need for clean water continues to increase. Estimated use of ground water to meet the needs of the population of 100 liters / person / day.

Excessive use of ground water will have a negative impact, among others: seawater intrusion, decrease in groundwater level, land subsidence which causes flood inundation in the rainy season.

For the Jakarta area the characteristics of the average rainy season are from October to March and the dry season from April to September. The peak of the rainy season in DKI Jakarta occurs from November to February with the highest rainfall average from 2008 until 2014 is in February, as can be seen in the following diagrams

Meanwhile, the conversion of land in recharge areas will increasingly threaten the availability of ground water due to reduced rainwater infiltration.

450.0 400.0 386.7

1

350.0

2

337.5

3

300.0

4 276.5

250.0

5 6 7

200.0 201.8 150.0

8 9

164.0 134.5

131.2

143.0

140.6

100.0

110.8

121.5

80.7

10 11 12

50.0 0.0 rain intensity average 2008-2014

Fig. 1. Cilandak District Rain Intensity (source : kecamatan dalam angka, BPS)

1

BACKGROUND The rise of building construction in DKI Jakarta has resulted in an increase in the amount of land area covered by pavement. This results in reduced rainwater infiltration into the soil which also results in an increase in water flow (run off) that directly flows into the canal or road body resulting in stagnant water and even flooding. Not to mention the use of ground water is still widely carried out by the community and large building like malls and offices so that Jakarta is still experiencing land subsidence with a significant amount.

The rainwater harvesting effort is one of the conservation efforts to maintain the adequacy of water supply in urban areas.

The DKI Jakarta Provincial Government has more than 6000 local government buildings including around 1708 school buildings

Re-construction

100 .

building/year

The number of buildings School in every Kelurahan are very potential for managing rainwater in the area and absorbing it back into the ground or retain rainwater with innovative measures. Besides that school as a learning center can be a good educational tool on the issue of climate change and its mitigation and adaptation in accordance with the Government of LH Number 5 of 2013 concerning Adiwiyata Guidelines. Thus a proposal is submitted with the title of rainwater harvesting in school.

Source: DKI Jakarta Environmental Services

Fig. 2. Jakarta’s Surface by Concrete

Table 1. School Building in Jakarta Owned by Government

Owned by Private

Primary School

1228

887

Secondary School

292

777

Senior High School

117

358

Vocational School

63

523

Special School

8

78

1708

2623

TOTAL

Source from http://data.jakarta.go.id/dataset/data-sarana-dan-prasarana-sekolah

2

PURPOSES, OBJECTIVES AND BENEFITS PURPOSES The purpose of planned rainwater harvesting on school buildings is to reduce rainwater runoff and reduce the potential for flooding and fulfill daily water needs.

OBJECTIVES 1. Contributing to the development of Rainwater Harvesting in school buildings in DKI Jakarta 2. Increase knowledge about planning or design of Rainwater Harvesting in school buildings in DKI Jakarta 3. Know the costs that must be invested in making Rainwater Harvesting in DKI Jakarta 4. Implementation of rainwater harvesting in school buildings in DKI Jakarta Province

BENEFITS 1. Availability of rainwater storage area in a large enough capacity.

So that the conservation of ground water in the school area can reduce theServices flood affected Source: DKI Jakarta Environmental area not only in the school environment but also in the area around the school 2. The school building as a water conservation area can improve the understanding and concern of students as building users and local residents as an area affected by the importance of using water and the environment wisely.

3. Triggers and models that are good for parents and the surrounding community in applying rainwater management in their homes and buildings.

4. Part of the solution to the effects of climate change

3

THEORITICAL BASIS Water Plaza Construction of a water plaza / water square in the central area of ​the city as an innovation to combine rainwater storage functions and other city facilities.

Rainwater Harvesting Collect and store harvested rain for home use, watering gardens, washing cars, urban farming and for storwater for release at later time

2019 The lessons learned during the DUTEP related to Climate Change Adaptation Innovation are

Green Roof Widely used for the stormwater management and energy savings potential, as well as their aesthetics Source: DKI Jakarta Environmental Services benefits

Permeable/Porous Pavement Porous asphalt concrete, paving stone or bricks allow the precipitation to infiltrate through the soil

CONCEPT OF PROBLEM SETTLEMENT Some alternative technology for replacing infiltration wells that have been applied in Rotterdam such as infiltration crates, permeable pavements, porous paving materials, roof polder, water square and water shells that can be implemented in school development . By implementing the rain water harvesting can solve the problem and turn it into benefit. (as shown in Fig. 3).

PROBLEM - Flood - Drought - Pollution

RAINWATER HARVESTING IN SCHOOL - Plan -Implementation - Monitoring and Evaluation

BENEFIT - Dry Feet - Water Supply - Fresh Air - Awareness / Education

Fig 3. Concept problem solving

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The Type of Rainwater Management Facility Some technical factors considered in implementing rain water harvesting include: 1) Depth of ground water level; 2) Land permeability; 3) Land slope; and 4) Fulfillment of distance requirements for rainwater management facilities to building foundations, septic tanks and infiltration wells.

Based on the technical factors above will determine the type of Rainwater Management Facility in implementing rain water harvesting, including (as shown in Fig.4) : 1) Rainwater Storage Facilities; 2) Retention; and 3) Detention.

WATER RESERVOIR

• Under ground • Above ground

RETENTION

DETENTION

• infiltration box • permeable paving

• Water Square • Polder Roof • water shels

Fig 4. the type of Rainwater Management Facility

Location Selection

Social Aspect

SDN Cilandak Barat 08, PondokLabu Village, Cilandak District is the location chosen as the pilot project to implement rain water harvesting. The selection was considered of the technical, social and economic aspects.

SDN Cilandak Barat 08 still uses ground water as the main source in meeting water needs . This condition is opportunity to educate students and the surrounding community that to meet daily water needs by implemented the rain water harvesting

Technical Aspect SDN Cilandak Barat 08, is located in South Jakarta, where water quality is assumed to be good and the presence of ground water in aquifers is still sufficient in the range of 15 to 20 m so that the surface water infiltration process feasible to implemented

Economic Aspect SDN Cilandak Barat 08 has been programmed into a total rebuild in the 2020 APBD Plan. The 2020 APBD that has not been ratified is an opportunity to intervene the total rebuild program by adding the rain water harvesting feature in the construction of SDN CilBart08

5

SCHEMATIC CONCEPT

Fig 5. SDN Cilandak Barat 08 Based on the survey results to the location of SD Cilandak Barat 08, taking into account the technical factors and experience gained in the DUTEP program in Rotterdam, the initial concept that will be adopted and adapted is the urban buffer spangen concept at the Sparta stadium. (collecting – transit – purifying – storage – reuse)

Source: DKI Jakarta Environmental Services

SDN Cilbar 08 with an area . of 2200m2 has an average daily rainfall of 12mm per day. Rough calculation for the volume of closed retention ponds built to accommodate rainfall in the school area is around 26 m3 (calculation attached).

Not only rain water, to take advantage of this RWH system in the dry season, this system can process gray water from hand washing water, ablution and dish washing. For this reason, before entering the closed retention pool, rain water and gray water are collected in a control tub that will filter waste, then the water enters the retention pond in filtration and is collected in the tub using a drain block (mineral wool) while slowly being absorbed into the soil . The excess or runoff from the retained pond that has been filtrated is accommodated in a pool of clean water that can be reused with a simple pump. This pump can be used by students to water plants or wash the personal vehicles of teachers and school employees

Fig 6. Urban Buffer Spangen Concept The concept to be developed at this school is the treatment of rainwater collected in closed retention ponds to be partially absorbed back into the soil and partly used to meet daily water needs

Fig 7. Develop Concept

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STAGING, TIME LINE AND BUDGETING STAGING RWH IMPLEMENTED IN JAKARTA SCHOOL

RWH IMPLEMENTED IN 5 ADMINISTRATIVE MUNICIPALITY

2022 RWH PILOT PROJECT IMPLEMENTED

2021 DUTEP WATER CHALLENGE

2020 2019 Fig 8. Milestone

TIMELINE 2019 No

2020

Description IV

1

Preparation

2

Design

3

Build / Construction

I

II

III

IV

Table 2. Timeline

BUDGETING

Rp300 mio

1. Socialization 2. Inventory of Student Desires 3. Private Identification and Engagement

PREPARATION

Rp22,000 mio

Rp700 mio

1. Design 2. Project auction to select implementers 3. Construction

DESIGN&BUILD

Rp23,000 mio

1. DED 2. Mineral Wool 3. Pipe

R.W.H

TOTAL

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ATTACHMENT STUDY CASE Rainwater management in school buildings has been implemented in several schools in the Netherlands, especially the cities of Rotterdam and Delft. In the city of Delft, Delfland Waterboard has a subsidy program for elementary schools that want to design school playgrounds to be more adaptive to rainwater. This program is named 'Blue Green School Yard'. The main objective of this program is to create more space for rainwater catchment areas and create a calm atmosphere by adding green elements in the school field.

This program also makes educational facilities for students and parents of local students when participating in giving opinions for design with criteria that are suitable for the school.

New Greeneries

After

New water ways & Insect House

One of the example is the PrinsMaurits School in the city of Delft. This school is subsidized by the Delfland Waterboard because it transforms the school field into an area with less pavement and increases green areas. In addition, the school invited children to Source: DKI Jakarta Environmental participate in usingServices rainwater in a water reservoir to water plants in the school area. Schools that get subsidies from the Delfland Waterboard have different designs and characteristics, some are made to widen water catchment areas, some are made as temporary water reservoirs with attractive flow designs so that they can be used as learning material for students the school.

Before

i

ATTACHMENT Recommendation Action Plan

1

Children Participation

2 Source: DKI Jakarta Environmental Services

3

Make school as place for increase knowledge about climate awareness from expert

Make interactive material for climate awareness

v

ATTACHMENT Analys

Existing

Economy

Rain Water Harvesting

o

Environment & Health

Resiliency Source: DKI Jakarta Environmental Services

Water Supply

o ii

ATTACHMENT

Source: DKI Jakarta Environmental Services

iii

ATTACHMENT

Source: DKI Jakarta Environmental Services

iv

DANK JE WEL