Calculating Sustainability Indices of Water and Basin to Maintain Sustainability Development (Case Study: Gamasiab Basin Watershed)

Protecting the watershed against future scenarios, an assessment of the sustainability of watersheds, based on water resources sustainability indicators of sustainable development in the catchment is necessary. In this study, not only the indicators of sustainable water resources and watershed sustainability indicators but also WEAP simulation model output have been calculated in Excel. Indicators of sustainable water resources survey quantity, availability of surface and ground water resources and watershed sustainability indicators have been achieved combining indicators of reliability, resiliency and vulnerability. In this respect, two scenarios in the Gamasiab catchment are defined. One contains only Jamyshan dam and other one three dams Jamyshan, Gheshlagh and Anahita, management alternatives to maintain stability of watershed were simulated and sustainability indicators were calculated. Finally, the best Executive Option in each scenario was obtained using multi-criteria decision analysis and compromise programing method. In the scenario, Jamyshan dam is the only best structural strategy to improve the sustainability of the combination of decrease losses and increase water efficiency alternative, besides, in the scenario three dams are the best strategy to the decrease losses.