文档介绍：文章编号:1008-181X(2000)03-0266-04
湖南省水土流失及其危害
贺建林
(湘潭师范学院地理系,湖南湘潭 411201)
摘要:目前湖南省水土流失面积已由50 ,%。水土流失为中等以上的县市占全省的比例达到了60%。湖南省水土流失以面蚀为主,水土流失日趋严重。水土流失主要有以下危害:降低土壤肥力,加剧旱洪灾害尤其是湖区的洪涝灾害,降低水利工程效益和阻碍水上交通。由此可见,水土保持工作不仅关系到湖南山区的经济发展和广大山区人民的脱贫致富,还关系到保护环境、资源和洞庭湖区的长治久安问题。
关键词:水土流失;危害;水土保持;措施;湖南省
中图分类号: 文献标识码:A
Soil and Water Loss and Its Dangers in Hunan Province
HE Jian-lin
( Department of Geography, Xiangtan Normal University, Xiangtan , Hunan 411201, China )
Abstract:Soil and water loss area in Hunan province has increased to ×104 km2 at the moment from ×104 km2 50 years ago. That is % of all area in Hunan province. That soil and water loss is ing stronger day by day and has the main following dangers: to reduce soil fertility, to aggravate flood and drought disasters especially flood in Dongting lake area, to reduce benefit of water conservancy projects and to block the water traffic. Thus, soil and water conservation works are related to not only economic development of mountain area in Hunan province, but also environmental and resources protection, and the safe and rich in Dongting lake area.
Key Words:soil and water loss; dangers; soil and water conservation; countermeasure;Hunan province
湖南省地处云贵高原向江南丘陵、南岭山地向江汉平原的过渡地带。,境内地形起伏,山地丘岗面积占全省土地面积的80%,地质构造复杂,易蚀土壤广为分布。全省雨量充沛,暴雨强度大,水土流失潜在因素十分活跃。再加上农业生产活动以及政策偏颇对水土资源保护的忽视,