Runoff and sediment load change and its influencing factors in the Xiaonanchuan River Basin, China

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Wang, Rui^1,2

Key Laboratory of Water and Soil Erosion Process and Control in the Loess Plateau, Ministry of Water Resources, Yellow River Institute of Hydraulic Research, Zhengzhou, China^1

Key Laboratory for Resources Use and Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China^2

关键词: Ecological environments;    Ecological restoration;    Multiple linear regression method;    Normalized difference vegetation index;    Runoff and sediments;    Sediment changes;    Vegetation coverage;    Water and soil loss;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/3/032018/pdf
DOI  :  10.1088/1755-1315/170/3/032018

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Based on the annual monitoring data of runoff and sediment and the Normalized Difference Vegetation Index (NDVI), the water and sediment change and the vegetation coverage dynamics in the Xiaonanchuan (XNC) River basin were analyzed. The main impacts factors of the water and sediment change were further identified by using the Multiple Linear Regression method. It is found that the runoff was increasing and the sediment was reducing in the XNC River basin during 2000 to 2013. Simultaneously, a significant upward trend was shown in NDVI. It indicates that the vegetation coverage was increasing and the natural ecological environment was improved in the basin. The quantitative analysis results show that the vegetation coverage is the dominant influencing factor of the water and sediment change in the XNC River basin. Therefore, under the condition of recent climate change, ecological restoration is one of the most effective way to prevent water and soil loss in arid area.