Ecological environmental changes and its impact on water resources and water-sediments relationship in Beiluo River Basin

HAN Shuangbao; WANG Sai; ZHAO Minmin; WU Xi; YUAN Lei; LI Haixue; LI Fucheng; MA Tao; LI Wenpeng; ZHENG Yan

doi:10.16030/j.cnki.issn.1000-3665.202305018

2023 Vol. 50, No. 6

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HAN Shuangbao, WANG Sai, ZHAO Minmin, WU Xi, YUAN Lei, LI Haixue, LI Fucheng, MA Tao, LI Wenpeng, ZHENG Yan. Ecological environmental changes and its impact on water resources and water-sediments relationship in Beiluo River Basin[J]. Hydrogeology & Engineering Geology, 2023, 50(6): 14-24. doi: 10.16030/j.cnki.issn.1000-3665.202305018

Citation:

HAN Shuangbao, WANG Sai, ZHAO Minmin, WU Xi, YUAN Lei, LI Haixue, LI Fucheng, MA Tao, LI Wenpeng, ZHENG Yan. Ecological environmental changes and its impact on water resources and water-sediments relationship in Beiluo River Basin[J]. Hydrogeology & Engineering Geology, 2023, 50(6): 14-24. doi: 10.16030/j.cnki.issn.1000-3665.202305018

Ecological environmental changes and its impact on water resources and water-sediments relationship in Beiluo River Basin

1.
Center for Hydrogeology and Environmental Geology Survey, China Geological Survey, Ministry of Natural Resources, Baoding, Hebei　071051, China
2.
School of Environmental Science and Engineering , Southern University of Science and Technology , Shenzhen, Guangdong　518055, China
3.
Collage of Environment, Harbin Institute of Technology, Harbin, Heilongjiang　150090, China
4.
The First Geological brigade of Hubei Geological Bureau, Daye, Hubei　435000, China
5.
School of Environmental Studies, China University of Geosciences, Wuhan, Hubei　430078, China
6.
China Institute for Geo-Environmental Monitoring, Beijing　100081, China

More Information

Corresponding author: WANG Sai, wangsai@mail.cgs.gov.cn

Received Date: 17 May 2023

Revised Date: 19 July 2023

Publish Date: 15 November 2023

Abstract

Abstract

The Loess Plateau region is seriously affected by soil erosion, water scarcity, and fragile ecosystems, which severely hinder social and economic development in the region. There is currently a lack of quantitative analysis and research on how human activities will affect the changes in water and sediment on the Loess Plateau and how to allocate the areas for reforestation and grassland restoration. This study focuses on the Beiluo River Basin in the Loess Plateau, analyzing the spatiotemporal variations of precipitation, runoff, water resources, sediment yield and normalized difference vegetation index (NDVI) over the past 20 years. The study establishes a distributed hydrological model for the basin, quantitatively evaluates the impact of returning farmland to forests and grassland on water resources and sediment transport, and explores the optimal land retirement plan under different decision-making conditions. The results show that the total water resources, runoff, groundwater resources and sediment yield in the basin are decreasing, and the annual reductions are 7×10⁸ m³, 1×10⁸ m³, 1.2×10⁸ m³, and 1.6×10⁴ tons respectively. While NDVI and precipitation is increasing, and the annual increases are 0.0064 and 65×10⁸ m³ respectively. The continuous increase in NDVI has resulted in a reduction in runoff volume and sediment transport. Returning farmland to forests and grassland or increasing vegetation density can reduce the amount of runoff and sediment transport, with sediment transport being more sensitive. Considering both the impact on runoff and sediment transport, based on multi-objective optimization, an optimal allocation proposal for the area of returning farmland to forest and grass is proposed. The optimal land retirement area is 28.1%. This study provides decision-making support for ecological environment construction, soil and water conservation, and rational utilization of water and sediment resources in the Loess Plateau region.
- ecological environment /
- water-sediment relationship /
- NDVI /
- distributed hydrological model /
- grain-for-green project /
- Beiluo River Basin

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References

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