福州大学城洪涝灾害成因

Flood Disaster Cause of Fuzhou University Area

福州大学城暴雨期频发洪涝灾害,主要与纵贯大学城的溪源江水系有关。运用区域降水空间分析、遥感影像分析、河流地貌调查等方法综合研究后认为:溪源江上游夏季降水集中,暴雨引发山洪是大学城洪泛的主要原因;大学城地块上升,河流下切侵蚀、袭夺原河道、改道后纵贯大学城、行洪路径大大延长、导致排水不畅是大学城积涝的主要原因。此外,大学城建设中地表硬化,排水系统不完善,河道多处受堵等人为因素加剧了大学城积涝。大学城洪涝灾害是自然因素和人为因素综合结果。

Frequent heavy rains flood in Fuzhou University area are main source of Xiyuanjiang river which runs through the university area of relevant department. In this paper, Comprehensive study by regional precipitation spatial analysis, synthesis methods of remote sensing image analysis, fluvial geomorphology surveys are used to research floods reason. It suggest that rainfall concentrated the river upstream in summer and triggered flash floods that are mainly due to the flood disaster. On the other hand, the university area land rose, river erosion cut down and river capture occurs that cause the original river diversion , extend the flood path and made poor drainage that are the natural factors of waterlogging. Drainage system is imperfect in university river are human factors of waterlogging. The floods are natural and human factors area and many human block the combined result.