煤矿采空塌陷区山洪危险性评价

利用层次分析法和山洪危险性指标体系,将Arc GIS空间分析模块运用到西区沟小流域危险性分区制图中.山洪危险性指标体系包括高程、采空危险分区、起伏度、植被类型、降雨强度、岩土类型和坡度7个指标,根据各指标不同等级影响洪水危险性的严重程度进行赋值.结合指标权重值,将指标系统进行数据叠加,获取山洪危险性分区图.最后将分区结果与历史洪水事件记录做验证对比,其结果与实际情况具有较好的一致性,该方法对西区沟的山洪危险性评价实用有效.

Flash Flood Hazard Assessment in Coalmine Goaf Catchment

The analytic hierarchy process (AHP) and the FFHIS (flash flood hazard index-based system)were applied for producing flash flood hazard zoning map in Xiqu gully by the ArcGIS software. The proposed index-based system processes information of seven parameters, namely, elevation, coalmine goaf risk zoning, waviness, vegetation types, rainfall intensity, soil types and slope angle. The assignment of different levels in the same parameter was based on the different severity. Based on the weight values, the data was superimposed to obtain the flash flood hazard zoning map. The historical flood events were used for validation. The validation showed that the flash flood hazard zoning map was consistent with the actual situations. The proposed index-based system and method were practical and effective for flash flood hazard assessment in Xiqu Gully.