Water Allocation Model Due to Non-Technical (Economic, Social, and Environmental) Factors
Abstract
Currently, the existing model in the research location (Balikpapan City) considers only the technical aspects, and there is subjective allocation due to the manager’s vision. This study simulated water allocation, taking into account nontechnical (economic, social, and environmental) factors. The research methodology consists of literature review, analysis of land use change based on the satellite Citra in 2014, 2015, and 2021, analysis of flood routing and flood maps based on LiDAR 2021, and analysis of flood vulnerability. The research location is the Karangmumus watershed, Talangsari sub-watershed in Samarinda City. The results indicate that the rainfall depth is 70 mm, and the area inundated with water to a depth greater than 0.7 m is 4.6 ha. Additionally, the area inundated to a depth greater than 0.5 m is 7.54 ha, and the area inundated to a depth greater than 0.3 m is 21.56 ha. Сhange in the inundation area impacts the level of flood vulnerability. It is expected that through a detailed examination of the land use change analysis in the Talangsari sub-watershed, it will be feasible to determine the susceptibility of areas in flood-prone regions in other watersheds. The extent of flood intensity can be assessed by considering land use transformations; therefore, the change in flood vulnerability impact can also be estimated. The outcomes of this study can serve as a useful guide for formulating area utilization policies in a watershed, thereby minimizing the potential impact of escalating flood vulnerability in the future.
Keywords: water allocation, economic factors, social factors, environmental factors.
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