中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
近50年金沙江干热河谷区泥沙变化及影响因素分析——以云南省元谋县为例

文献类型:期刊论文

作者崔鹏
刊名中国水土保持科学
出版日期2006
卷号4期号:5页码:20-24,34
关键词干热河谷 泥沙 变化 影响因素 元谋县
其他题名Sediment yields and impact factors in xerothermic valley in Jinsha River in the last 50 years:A Case study in Yuanmou County,Yunnan Province
通讯作者第宝锋
合作状况其它
中文摘要以金沙江干热河谷典型区域元谋县为例,通过对该区龙川江小黄瓜园水文站20世纪50年代以来输沙量的变化分析,结果表明,河流输沙量有增加的趋势,特别是80年代末至2000年,年均输沙量由400万t(1971—1980年)增加至750万t(1991-2000年)。为研究输沙量变化的原因,为当地生态环境建设提供理论指导,采用统计分析等方法对输沙量增加的影响因素进行分析,结果表明:50年来局地气候变化,特别是降雨量及降雨强度的增加使地表侵蚀加速,进入河道泥沙增多。同时,由于受牲畜数量快速增加、人口的迅速膨胀、生产方式的落后及农作物市场价格等因素影响,土地覆被及结构变化明显,即覆被盖度减小,坡耕地增加,灌草地等蓄水保土作用好的地类面积迅速减少,进而导致生态极为脆弱的元谋干热河谷区土壤侵蚀加剧,河道泥沙含量增加。此外,元谋县强烈的冲沟侵蚀也是龙川江输沙量增加的重要原因之一。
英文摘要The sediment yields of Jinsha River basin has shown a significantly in—creased trend in recent
years.Th is research focuses on the Yuanmou County which is a typical xerothermic valley of Jinsha River
basin.The sediment yields variation in Long Chuan River(Xiaohuangguayuan),a river passing through this
region during the period of 1956- 2000 were analyzed.Th e annual sediment yield of the Lo ng Chuan River
has an increase tendency since 1950 S.particularly,in 1990 S.Th e mean annual sediment yield increased
from 400×104 t(1971- 1980)to 750×104 t(1991-2000).By analysing the impact factors on sediment
yields based on statistic analysis methods,it is shown that regional climate change,especially the increase in
the quantity and intensity of rainfall,is the main reason accelerating the surface erosion and increasing the sed—
iment yields of the river.At the same time,due to the rapid increase in the amount of livestock,rapid popula—
tion expansion,lagged production methods an d influence of crop market price,the land cover and the structure
of land use have obviously changed during the recent 50 years.Th e decrease of lan d covered area,the increase of slope farmland and the decline of the area of shrub and grass,which have high values in soil and water con·
servation but relative low values in economic profit per unit,have heavily aggravated soil erosion and increased
fiver sediments which extremely undermined the fragile ecology of xerothermic valley in Yuanmou County.Fur·
thermore,the intensive gully erosion is another important inducement of the increase of sediment yields in Longchuan River.
分类号TV143
资助信息国家973项目“长江上游环境变化与产水产沙作用机制”(2003CB415202);国家杰出青年科学基金项目“泥石流预测预报基础理论研究”(40025103)
语种中文
公开日期2010-08-27
源URL[http://ir.imde.ac.cn/handle/131551/1639]  
专题成都山地灾害与环境研究所_成都山地所知识仓储(2009年以前)
成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
推荐引用方式
GB/T 7714
崔鹏. 近50年金沙江干热河谷区泥沙变化及影响因素分析——以云南省元谋县为例[J]. 中国水土保持科学,2006,4(5):20-24,34.
APA 崔鹏.(2006).近50年金沙江干热河谷区泥沙变化及影响因素分析——以云南省元谋县为例.中国水土保持科学,4(5),20-24,34.
MLA 崔鹏."近50年金沙江干热河谷区泥沙变化及影响因素分析——以云南省元谋县为例".中国水土保持科学 4.5(2006):20-24,34.

入库方式: OAI收割

来源:成都山地灾害与环境研究所

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。