摘要
从气候异常、特殊地貌、地质结构等自然因素及长江中上游森林破坏、水土流失加剧、围湖造田、工程活动增加等人为因素对产生洪涝灾害进行分析;指出森林破坏加剧水土流失是诱发和加剧洪涝灾害的重要因素,从政策及技术方面提出防治水土流失和洪涝灾害的建议和途径。
By analysising the causes of the Yangtze River floods in 1998,we have found out that the following factors should be respossible for it:natural factors,such as abnormal climate,pe- culiar landforms,geological structure,and man—caused factors,e,g.the destruction of forest at the upper and middle reaches of the Yangtze River,worsening soil,erosion,altering lakes into farmlands,and increasing construction projests.It should be pointed out that the destruction of forest,which as a result speeds up soil ersion,is the key factor for worsening floods.This paper provides some suggestions and measures for policy making and techniques about the prevention and control of soil erosion and floods.
