Water is a vital element that is used to meet human needs such as domestic and non-domestic activities (agriculture, fisheries, tourism, and industry). The more human activities carried out, the greater the amount of water needed. Therefore, it is necessary to analyze the availability and demand for water to determine the conditions of shortage and excess water to meet future water needs. The method used in this research was the quantitative descriptive method with the study area unit covering all parts of the Logawa Sub-Watershed. The research sample was taken using the purposive sampling method with data collection techniques including secondary data in the form of literature studies and related institutions and primary data in the form of direct observations in the field. Data analysis was determined by the discharge duration curve formula to obtain a reliable discharge and calculate the water demand in each sector. The results of the study show that the availability of water in the Logawa Sub-Watershed can suffice the water needs of the domestic and non-domestic sectors (agriculture and livestock) in 2023 and domestic water needs in 2030.

中文翻译：

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洛加瓦次流域地表水可用性分析及 2030 年生活用水需求预测

水是满足人类需求的重要元素，例如家庭和非家庭活动（农业、渔业、旅游业和工业）。人类活动越多，所需的水量就越大。因此，有必要分析水资源的可获得性和需求量，以确定水资源短缺和过剩的情况，以满足未来的用水需求。本研究采用的方法为定量描述法，研究区域单元覆盖洛加瓦次流域的所有部分。研究样本采用立意抽样方法，数据收集技术包括文献研究和相关机构形式的二手数据和现场直接观察形式的第一手数据。数据分析通过流量历时曲线公式确定，得到可靠的流量并计算出各扇区的需水量。研究结果表明，洛加瓦次流域的可用水量可以满足2023年家庭和非家庭部门（农业和畜牧业）的用水需求以及2030年的生活用水需求。