摘要
通过RUSLE模型和GIS技术,利用降雨数据、土地利用数据等,估算乌江流域2000、2005、2010年及2015年4个时间段的土壤侵蚀量,并分析其土壤侵蚀的时空变化特征。结果表明:2000~2010年土壤侵蚀量呈下降趋势,2010~2015年呈上升趋势。在时间变化上,微度侵蚀面积由2000年的43.86%增至2015年的63.16%;轻度、中度、强度和极强度侵蚀面积分别由2000年的23.30%、18.08%、10.24%和4.38%降至2015年的14.76%、13.50%、5.18%和3.13%;剧烈侵蚀面积由2000年的0.14%增至2015年的0.29%。在空间分布上,土壤侵蚀较严重的区域均分布在西南部和东北部,以中、强度为主;其他区域以微、轻度为主。总体上,乌江流域2000~2015年土壤侵蚀量呈下降趋势;侵蚀度以微、轻度为主且呈逐渐降低趋势;土壤侵蚀较严重地区多分布在流域西南部和东北部,以度、强度为主,而其他区域主要以微、轻度为主。
In order to explore the soil erosion status and its temporal and spatial variation characteristics of the Wujiang River Basin.This paper by the RUSLE model and GIS technology,use rainfall data,land use data,etc.,to estimate the amount of soil erosion in the basin in four time periods:2000,2005,2010 and 2015,and analyze its Spatial-temporal variation characteristics of soil erosion.The results showed that:The amount of soil erosion showed a downward trend from 2000 to 2010 and an upward trend from 2010 to 2015.In terms of temporal variation,the area of micro-erosion increased from 43.86%in 2000 to 63.16%in 2015.The areas of mild,moderate,intense and extreme intensity erosion decreased from 23.30%,18.08%,10.24%and 4.38%in 2000 to 14.76%,13.50%,5.18%and 3.13%in 2015,respectively.The area of severe erosion increased from 0.14%in 2000 to 0.29%in 2015.In terms of spatial distribution,the areas with serious soil erosion were distributed in the southwest and northeast,mainly medium and intensity.Other areas are mainly micro and mild.The conclusion is,the amount of soil erosion in the Wujiang River Basin showed a downward trend from 2000 to 2015.The erosion degree was mainly micro and mild,and the trend was gradually decreasing.The areas with serious soil erosion are mostly distributed in the southwest and northeast of the watershed,mainly moderate and intense,while other areas are mainly micro and mild.
作者
李延孟
李芹
张庆
LI Yanmeng;LI Qin;ZHANG Qing(Power China Guiyang Engineering Corporation Limited,Guiyang 550081,China;Power China Ecological Environment Design Research Corporation Limited,Suzhou 215131,China)
出处
《水电与抽水蓄能》
2023年第S01期70-74,69,共6页
Hydropower and Pumped Storage
基金
中国电建集团贵阳勘测设计研究院有限公司科研重大专项“工程时空信息与协同设计关键技术研究”(YJZD2020-01)。
关键词
土壤侵蚀
时空特征
RUSLE模型
GIS技术
乌江流域
soil erosion
spatial-temporal characteristics
RUSLE model
GIS technology
Wujiang river basin
作者简介
李延孟(1985—),男,高级工程师,主要研究方向:智慧工程系统设计等。E-mail:liyanmeng_gyy@powerchina.cn;李芹(1996—),女,助理工程师,主要研究方向:GIS应用。E-mail:2494040322@qq.com;张庆(1984—),男,教授级高级工程师,主要研究方向:工程建设管理。E-mail:zhangq_gyy@powerchina.cn
