Flood disaster mitigation begins with reducing the susceptibility of flood supplier areas. This task can be accomplished by mapping the flood-supplier susceptibility and then deciding on long-term flood mitigation actions following the susceptibility level of the land and the legal status of its area. Pacal reservoir has Gondang as one of its catchment areas. During the rainy season, the spillway releases water immediately because the inflow exceeds capacity. To maximize water storage, reduce Pacal reservoir input, and prevent downstream flooding, the land cover must be improved. This paper will investigate the Gondang micro-flood-prone catchment’s locations and propose mitigation strategies. The legal status of the land is used, as well as Climate Hazards Group Infrared Precipitation with Station data (CHIRPS), Digital Elevation Model (DEM), and Google Imagery from 2014 and 2020. Paimin’s Equation was used to assess the flood risk. The findings indicate that the Gondang micro-catchment is susceptible to flood suppliers on a low to a high level. Changes in land cover during 2014-2020 resulted in alterations to the susceptibility level of the area. The legal status of the area has had an impact on land cover management. The simulation results of reforestation and maintenance of dense forests in forest areas, as well as regreening activities in agricultural areas, can improve land with high susceptibility to moderate levels, which accounts for 20.9% of micro-catchment areas. All of these proposed activities are expected to control the Pacal Reservoir’s inflow during the rainy season by increasing soil infiltration and reducing runoff.

中文翻译：

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降低东爪哇省 Bojonegoro Gondang 微流域洪水供应区的敏感性：一项洪水减灾工作

减轻洪水灾害首先要降低洪水供应区的易受影响程度。这项任务可以通过绘制洪水供应商的敏感性图，然后根据土地的敏感性水平及其区域的法律地位决定长期防洪行动来完成。帕卡尔水库以贡塘为集水区之一。雨季时，由于进水量超过容量，溢洪道立即泄水。为了最大限度地提高蓄水量、减少帕卡尔水库的投入并防止下游洪水，必须改善土地覆盖。本文将调查 Gondang 微洪水易发流域的位置并提出缓解策略。使用了土地的法律地位，以及 2014 年和 2020 年气候灾害组织红外降水站数据 (CHIRPS)、数字高程模型 (DEM) 和 Google 图像。使用 Paimin 方程来评估洪水风险。研究结果表明，Gondang 微流域容易受到低水平到高水平洪水供应的影响。 2014 年至 2020 年期间土地覆盖的变化导致该地区的易感性水平发生变化。该地区的法律地位对土地覆盖管理产生了影响。林区植树造林和茂密森林维护以及农业区绿化活动的模拟结果可以将高易感性土地改善至中等水平，占微流域面积的20.9%。所有这些拟议的活动预计将通过增加土壤渗透和减少径流来控制帕卡尔水库在雨季的流入量。