Temporal and spatial variations in water discharge and sediment load on the Loess Plateau, China: A high-density study

The Science of the Total Environment
Haiyan ZhengHu Li

Abstract

Over the past 50 years, a series of soil and water conservation measures have been implemented on the Loess Plateau, including biological, engineering, and agricultural measures. As a result, water discharge and sediment load on the plateau have undergone significant changes. In this study, we compared the water discharge and sediment load at >100 hydrological stations across the Loess Plateau during the period 2008-2016 (P2) with the water discharge and sediment load during the period 1971-1987 (P1), and detected the main sources of sediment in each of the two periods. We then performed an attribution analysis to quantify the influence of different factors on the changes in sediment load. We found the following results: (1) Water discharge was reduced by 22% in P2 compared with P1, whereas the sediment load was reduced by 74%. (2) Sediment resources are mainly concentrated between Toudaoguai and Tongguan stations: this region contributed >88% of the total sediment load at the terminal station (Huayuankou station) in both P1 and P2. (3) When considering only the changes in sediment concentration on the Loess Plateau, we conclude that the contribution of human activities was >72%. This study provides a detailed description of th...Continue Reading

Citations

Oct 21, 2020·Environmental Science and Pollution Research International·Kaipeng XuXiahui Wang
Dec 1, 2019·The Science of the Total Environment·Pengcheng SunLinjing Qiu
Jan 14, 2022·The Science of the Total Environment·Tong LiBojie Fu

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