The intensive agricultural activities in the Cilongkrang Sub-Watershed are causing environmental changes that can lead to various disasters. This study aims to map the spatial distribution of multiple hazards, including flash floods, erosion, and landslides. Three hazards selected because the critical condition of Cilongkrang Sub-Watershed as an upstream area caused the area to be prone to those hazards. The flash flood hazard model was created using the Flash Flood Potential Index (FFPI) method, which uses land use, slope, vegetation cover, and soil texture. The erosion hazard model was created using the Universal Soil Loss Equation (USLE) method with parameters such as erosivity, erodibility, slope length factor, crop management index, and soil conservation index. The landslide hazard model was created using the Spatial Multi-Criteria Evaluation (SMCE) method, which uses slope, landform, land use, and soil texture. The results showed that the dominant flash flood-prone areas were in the medium class of 1.556 hectares, the erosion tended to be very low, which was 2.699,5 tons/ha/year, and The Argapura Sub-District encompasses multiple regions that are highly susceptible to landslides.

中文翻译：

---

印度尼西亚马贾伦卡 Cilongkrang 次流域多种灾害测绘

Cilongkrang 次流域的集约化农业活动正在引起环境变化，从而可能导致各种灾害。本研究旨在绘制多种灾害的空间分布图，包括山洪、侵蚀和山体滑坡。选择三种灾害是因为 Cilongkrang 子流域作为上游地区的危急条件导致该地区容易发生这些灾害。山洪灾害模型是使用山洪潜在指数 (FFPI) 方法创建的，该方法使用土地利用、坡度、植被覆盖和土壤质地。侵蚀危害模型是使用通用土壤流失方程（USLE）方法创建的，参数包括侵蚀性、可蚀性、坡长系数、作物管理指数和土壤保持指数。滑坡灾害模型是使用空间多标准评估（SMCE）方法创建的，该方法使用坡度、地形、土地利用和土壤质地。结果显示，主要山洪易发区面积为 1.556 公顷，侵蚀量非常低，为 2.699.5 吨/公顷/年，Argapura 分区涵盖多个区域，极易发生山体滑坡。