南水北调与水利科技（中英文）2025，Vol.23Issue(2)：251-259,9.DOI:10.13476/j.cnki.nsbdqk.2025.0032
黄河流域青海段2000-2020年土壤侵蚀时空动态变化
Spatiotemporal dynamic changes of soil erosion in the Qinghai section of Yellow River basin from 2000 to 2020
摘要
Abstract
Soil erosion has caused severe damage to land resources,weakened the function of ecosystems,increased the risk of floods and droughts,and posed a significant threat to agricultural production,affecting food security and sustainable agricultural development.In impoverished areas,soil erosion has further intensified the poverty level of residents.The Yellow River basin is among the severely eroded regions in China,which still faces a severe of water and soil loss situation,with vast areas of hydraulic and wind erosion.Soil erosion problem in Qinghai Province,as the origin and main stream area of the Yellow River,not only affects the secarity of China's water resources,but also has a profound impact on rare animals and plants,as well as the socio-economic development of the region.Therefore,conducting research on soil erosion is of great significance for promoting the development of soil and water conservation management systems. This study aimed to summarize the major research achievements of soil erosion models in China in recent years.Taking soil erosion in the Yellow River basin of Qinghai Province as the research object,basic data on hydrology and soil was collected,geographical information systems(GIS)and remote sensing technology(RS)were comprehensively utilized to accurately screen and revise the estimation methods for the six influencing factors of the Revised Universal Soil Loss Equation(RUSLE).The study analyzed the temporal and spatial distribution patterns and determinants of soil erosion from 2000 to 2020,and provided a set of annual datasets by comparing and analyzing the calculation methods of various factors related to soil erosion in the Yellow River basin of Qinghai. The results indicated that:1)From a temporal perspective,the soil erosion situation of the study area improved from 2000 to 2020.The average soil erosion modulus decreased by 537.78 t/(hm2·a-1)in 2020 compared to 2000,resulting in a reduction of 811.93×105 t in total soil erosion.Spatially,areas with high levels of soil erosion were mainly concentrated in the densely populated northeastern part of the study area,while soil erosion was relatively low in the southwestern region.2)Grassland was the primary location for soil erosion.accounting for over 65％ of the total area.The areas of slight and light erosion in cultivated land,woodland,and grassland all showed an upward trend,while the areas of intense and above-intensity erosion exhibited a downward trend.3)As the slope increased,the soil erosion area followed a pattern of "decline-increase-decline".In particular,the region with a slope of 15° to 25° was the most concentrated area for high-intensity erosion,making it a key area for soil erosion prevention and control. Based on the above analysis,the soil erosion area and intensity exhibited a trend of "double reduction" from 2000 to 2020,indicating an overall improvement in soil erosion conditions.However,there were significant spatial differences in the distribution of erosion.In the future,the key areas for soil erosion prevention and control will be studied with simple land use structures and steep slopes where human activities are dense.关键词
黄河流域/土壤侵蚀/RUSLE/地形因子/青海Key words
Yellow River basin/soil erosion/RUSLE/topographical factor/Qinghai Province分类
水利科学引用本文复制引用
刘兴宇,宋宏利,李润杰,朱文彬..黄河流域青海段2000-2020年土壤侵蚀时空动态变化[J].南水北调与水利科技（中英文）,2025,23(2):251-259,9.基金项目
国家重点研发计划青年科学家项目(2023YFC2908600) （2023YFC2908600）
青海省科技计划项目(2024-SF-A6) （2024-SF-A6）
