Indonesia has a national water security index of 2 according to the water security framework (Asian Water Development Outlook). Household and urban water security dimensions remain as the most important challenges. Only 20% of households have piped water access and 54% have access to sanitation in rural areas. In urban settings, piped urban water supply access is 36%. In terms of water quality only 34% of the water is treated in waste water treatment plants .Nevertheless, since 1990 Indonesia has significantly increased the percentage of its population with access to safe drinking water, this being 70% in 1990 and reaching 85% in 2012. In Java, water security is inadequate due to persistent problems in water supply, sanitation and water quality as well as high risk of floods and droughts. The situation might be aggravated due to the impacts of climate change and future socio-economic developments. At global level, in September 2015 countries adopted the 17 Sustainable Development Goals (SDGs) to end poverty, protect the planet, and ensure prosperity for all. Each goal has specific targets to be achieved by 2030. In this context, Deltares in collaboration with national and regional governmental agencies, scientific community, local stakeholders and Royal Haskoning DHV company has completed the formulation of Integrated River Basin Management plans for 5 major river basin territories in Indonesia as part of the WISMP2-BWRMP project supported by the World Bank.
The preparation of the Integrated River Basin Management plans involved the collaborative development and use of a RIBASIM water allocation model. The collaborative modelling approach comprised direct capacity development for key stakeholders on the development and use of the water balance model. This was combined with various collaborative workshops where policy makers, governmental agencies, universities and local stakeholders provided inputs for the development and use of the model based on their local knowledge. They were involved in the design and development of the model and data collection, as well as, in defining the water-related problems in the region and possible interventions to be implemented.
The collaborative modelling approach employed was composed of three main phases: initial development of a common conceptual model with all stakeholders using Group Model Building Approach, detailed joint development of the RIBASIM simulation model with local technical stakeholders, joint use of the developed model in the formulation of water allocation strategies.
Ultimately, the collaborative modelling approach supported the dialogue among stakeholders for informed decision making on the preparation of the Integrated River Basin Management plans.For more information click here
For more information about RIBASIM tool click here
