洞庭湖区的泥沙淤积效应(英文)

编号 zgly0001585972

文献类型 期刊论文

文献题名 洞庭湖区的泥沙淤积效应(英文)

作者 李景保  尹辉  常疆  卢承志  周和平 

作者单位 CollegeofResourcesandEnvironmentScience  HunanNormalUniversity  HunanHydro&PowerDesignInstitute 

母体文献 Journal of Geographical Sciences 

年卷期 2009年03期

年份 2009 

分类号 P333.4 

关键词 sedimentation  lakebeach  sedimentdisasterchain  sandresources 

文摘内容 According to a long series of measured sediment data,the sedimentation effects of the Dongting Lake Area(DLA) were studied in light of the relationship between sedimentation characteristics and resources and environment.The result shows that the long-term deposition and the impact of human activities have led to a cycle of the evolution of sedimentation pattern,resulting in sediment disaster effects and resources effects in the DLA.The main features are as follows:1) The water beach,silt beach,lake marsh beach,reed beach and other types of beach shaped by sedimentation effects constitute the main body of the giant lake system.2) The disaster chains are induced,i.e.,sedimentation → marshland expansion and reclamation → flood function decline,fish resource depletion,biodiversity reduction dis-aster chain,sedimentation → marshland expansion → floods,water pollution disaster chain,sedimentation → marshland floating vegetation rising → schistosomiasis,rodents virulence disaster chain,sedimentation → flood embankment bursting → land desertification disaster chain.3) Sedimentation has created about 98.13×104 hm2 of land in the past 55 years.Rational development and utilization of marshland resources have produced tremendous economic benefits.