The document discusses rainwater harvesting (RWH) as an alternative water source in Indonesia, highlighting its integration into sustainable water resource management and low impact development (LID) strategies. It emphasizes the importance of a holistic approach to water management to combat environmental issues and enhance community resilience. The University of Indonesia serves as a model for these practices, aiming to optimize local water resource management while promoting environmental conservation and community engagement.

1. Rain Water Harvesting as Alternative Water Source “Changes start from inside the Campus” Indonesia Case of RWH Presented by: Toha Saleh Center for Environmental and Water Engineering Research Civil Engineering Department, Faculty of Engineering – University of Indonesia Research Team: Toha Saleh, Elkhobar, Dwinanti, Dwita SM Participated Students: Adi Pauna, Ahmad Dzaky, Robby Regional Conference for Southeast Asia on Rainwater Harvesting in Integrated Water Resources Management: "An Exchange of Practices and Learnings“ 25-26 November 2008, Davao City - Philippines.

2. Indonesia Facts Rainfall: 200-300 mm/year (more than 2,500 km 3 ) Environmental Issues: Flood, Drought, Landslide, Poor Water Quality, Poor Access to Water People: Activities, Habits, Politics, Coordination Region Yearly Rainfall (mm) South part of Gunung Slamet (Central Java) 4.000 Bogor (West Java) 3.200 Sumatera 2.300 Malang (East Java) 2.000 Nusa Tenggara (Next to Timor Leste) 1.000 Palu (Central Sulawesi) 546

3. Understanding the IWRM Water is the basis for all living ecosystems and habitats and part of an immutable hydrological cycle that must be respected if development of human activity and well-being is to be sustainable. A holistic, systemic approach relying on Integrated Water Resources Management (IWRM) must replace the fragmentation that currently exists in managing water

4. The Need of IWRM As a tool towards Proper water management Adaptation to climate change Achieving MDGs Knowledge transfer for next generation Plan to sustainability

5. Rainwater Harvesting Reduce Runoff Preserve Groundwater Reduce Environmental Losses Lessen Drought Period Plan to sustainability As part of Low Impact Development (LID) Approach

7. Low Impact Development An innovative, ecosystem-based approach to land development and stormwater management To mimic predevelopment site hydrology, by considering local natural environment & limitations, through introduction of site design techniques  effects of development will be minimal

8. Why We Need Low Impact Development To better protect our: Streams Fish and wildlife habitat Watershed hydrology Drinking water Water quality To reduce infrastructure costs To make our communities more attractive

9. Primary Goal of LID Design each development site to protect, or restore, the natural hydrology of the site so that the overall integrity of the watershed is protected. This is done by creating a “hydrologically” functional landscape.

10. Basic LID Principles 1. Conserve natural areas 2. Minimize development impacts 3. Maintain site runoff rate 4. Use integrated management practices 5. Implement pollution prevention, proper maintenance and public education programs Low-Impact Development Design Strategies (An Integrated Design Approach) , Prince George.s Country, Maryland. Department of Environmental Resources Programs and Planning Division. June 1999.

11. LID Implementation Identify and develop applicable regulations and requirements Use drainage/hydrology as a design foundation Allow designs that reflect conservation plans Reduce site imperviousness and minimize directly connected impervious areas Use sustainable integrated management practices Develop pollution prevention, maintenance, public outreach and education programs

12. Conservation Open Drainage Rain Gardens Amended Soils Rain Barrel Reduced Imperviousness LID Site Porous Pavement Create a Hydrologically Functional Lot

13. 0 4 8 12 16 LID Site Delay in Discharge Reduced Peak Discharge Prolonged Groundwater Flow Conventional Immediate Discharge Higher Peak Flows Flashy Hydrology

14. LID Practices Green Roofs

15. Planter Boxes LID Practices

16. Rain Barrels, Cisterns and Storage Tanks LID Practices

17. Green Infrastructure by Design: Sustainable Urban Water Management … One of the program The Development of UI Campus as Natural Laboratory

18. Firstly, Welcome… to the University of Indonesia

19. University of Indonesia To be acknowledged as a research university – the center for excellence in science, technology, and culture the vision the goals Enhance Science and Technology in the Indonesian culture through Research, Disseminate the Knowledge through quality software, and Implement the Idea through public service

20. University of Indonesia Campus lies on more than 300 Ha (15 ha of buildings, 95 ha of open space & parking lots, 190 ha of garden & urban forest) Set in 2 provinces (Jakarta & West Java – Depok) Consists of 6 lakes as part of Ciliwung-Cisadane Watershed System Planned as urban tropical forest and groundwater recharge area the site

21. Map of UI Campus

22. Motivations of the Program Environmental consciousness in planning & design of infrastructure system leading to sustainability of the environment = Green Design Vision: to become the center of excellence having strong environmental consciousness

23. Utilizing the water courses within the campus as reservoir, water and land conservation , to support the government program Optimizing the water resources management in the campus and surroundings (Depok area) by integrating the Ciliwung-Cisadane watershed management Utilizing the campus area (the lakes, the urban forest, and surroundings) as research areas for student and community Purpose of the Program

24. Program Framework

25. Concept Lakes as groundwater recharge area, to compensate the land conversion used by UI Realization of environmental-friendly campus

26. Utilization Groundwater recharge area Research laboratory and education support Flood control Urban forest and conservation Landscape component which introduce the beautifulness, freshness, and technologically developed Sport and recreation facilities and infrastructures for student, academics, and community

27. Water & Land Conservation Lakes and ponds rehabilitation as water system component in Greater Jakarta Role model for environmental-friendly campus through the development of water conservation area Harvest the rain to reduce runoff and GW abstraction

29. Current Activities Research on: Sustainable Urban Water Management Low Impact Development and BMPs Groundwater / aquifer in Depok area Social issues Community development Collaborative activities with the Depok authority (Depok 2020: High-quality Education City)

30. RWH Study Areas K A M P U S Kenanga Agatis Mahoni Puspa Ulin Salam

31. RWH

32. RWH Cistern

33. Beneficiaries Internal beneficiaries: academic staff students External beneficiaries: decision makers (local authorities, people’s representatives), industry, intermediaries (developers, consultants, contractors, NGOs) academics within the inter-university network general public.

34. Result RWH is effective approach to replace GW Daily cost reduction High investment? but the investment is not the money nor the cost, but the sustainability itself Still need water treatment to be able for drink More researches

35. Summary LID is an approach to land development and stormwater management that helps protect water resources and watershed hydrology. We’re gaining a better understanding of how LID can be used to protect the environment, reduce costs and make our communities more attractive. Rainwater harvesting can be advantageous Let’s start from ourselves, then tell others

36. Thank You