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Influence of Landscape Pattern Changes on Runoff and Sediment in the Dali River Watershed on the Loess Plateau of China

Author

Listed:
  • Yan Zhang

    (Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China)

  • Zhilei Bi

    (Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China)

  • Xin Zhang

    (Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China)

  • Yang Yu

    (Department of Sediment Research, China Institute of Water Resources and Hydropower Research (IWHR), State key Laboratory of Simulation and Regulation of Water Cycle in River Basin, Beijing 100038, China)

Abstract

The large-scale Grain for Green project on the Loess Plateau of China significantly changes the regional landscape pattern, which has a profound impact on runoff and sediment process. The relationship between landscape pattern and runoff and sediment in the Dali River watershed is established. Cropland and grassland areas in the watershed show a downward trend, whereas the woodland and building land increases continuously. The Number of Patches (NP), Patch Density (PD) and Landscape Diversity (SHDI), Landscape Division Index (DIVISION) increase significantly. The Largest Patch Index (LPI) and Landscape Shape Index (LSI) show overall change in the rising and falling rule. The Contagion Index (CONTAG) and Cohesion Index (COHESION) first increase, then decrease. A decreasing trend is shown by runoff and sediment. The annual runoff in 2010 was 29.76% less than in 1960, and the annual sediment load was 84.87% less. NP, PD, COHESION, DIVISION and SHDI have a significant negative correlation with runoff and sediment, and CONTAG and runoff sediment are positively related. This study could provide theoretical support for guiding watershed land use and landscape planning to effectively reduce runoff and sediment transport.

Suggested Citation

  • Yan Zhang & Zhilei Bi & Xin Zhang & Yang Yu, 2019. "Influence of Landscape Pattern Changes on Runoff and Sediment in the Dali River Watershed on the Loess Plateau of China," Land, MDPI, vol. 8(12), pages 1-12, November.
    • Handle: RePEc:gam:jlands:v:8:y:2019:i:12:p:180-:d:290379
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    Citations

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    Cited by:

    1. Jiahui Zhou & Peng Gao & Changxue Wu & Xingmin Mu, 2023. "Analysis of Land Use Change Characteristics and Its Driving Forces in the Loess Plateau: A Case Study in the Yan River Basin," Land, MDPI, vol. 12(9), pages 1-20, August.
    2. Min Xia & Linyan Wang & Bo Wen & Wei Zou & Weixin Ou & Zhongqiong Qu, 2021. "Land Consolidation Zoning in Coastal Tidal Areas Based on Landscape Security Pattern: A Case Study of Dafeng District, Yancheng, Jiangsu Province, China," Land, MDPI, vol. 10(2), pages 1-13, February.
    3. Ning Huang & Tao Lin & Junjie Guan & Guoqin Zhang & Xiaoying Qin & Jiangfu Liao & Qiming Liu & Yunfeng Huang, 2021. "Identification and Regulation of Critical Source Areas of Non-Point Source Pollution in Medium and Small Watersheds Based on Source-Sink Theory," Land, MDPI, vol. 10(7), pages 1-23, June.
    4. Mingming Deng & Qiyue Li & Wenya Li & Geying Lai & Yue Pan, 2022. "Impacts of Sand Mining Activities on the Wetland Ecosystem of Poyang Lake (China)," Land, MDPI, vol. 11(8), pages 1-13, August.
    5. Ara Jeong & Ronald I. Dorn & Yeong-Bae Seong & Byung-Yong Yu, 2021. "Acceleration of Soil Erosion by Different Land Uses in Arid Lands above 10 Be Natural Background Rates: Case Study in the Sonoran Desert, USA," Land, MDPI, vol. 10(8), pages 1-28, August.

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