Journal of Geographical Sciences

, Volume 22, Issue 5, pp 946–960 | Cite as

Quantitative study on influences of terraced field construction and check-dam siltation on soil erosion

  • Haidong Gao
  • Zhanbin Li
  • Peng Li
  • Lianlian Jia
  • Xiang Zhang
Article

Abstract

To study the influences of terraced field construction and check-dam siltation on soil erosion of a watershed, we built a simplified watershed model for the Loess Plateau hilly-gully region including terraced fields, slope farmlands, steep-slope grasslands, and dam farmlands, and defined three states of watershed (i.e., pioneer, intermediate, and climax stages, respectively). Then, the watershed soil erosion moduli at various stages were studied by using a revised universal soil loss equation. Our results show that the pioneer and climax stages are the extreme states of watershed soil-and-water conservation and control; in the pioneer stage, the soil erosion modulus was 299.56 t·ha−1·a−1 above the edge of gully, 136.64 t·ha−1·a−1 below the edge of gully, and 229.74 t·ha−1·a−1 on average; in the climax stage, the soil erosion modulus was 39.10 t·ha−1·a−1 above the edge of gully, 1.10 t·ha−1·a−1 below the edge of gully, and 22.81 t·ha−1·a−1 on average; in the intermediate stage, the soil erosion modulus above the edge of gully exhibited an exponential decline along with the increase in terraced field area percentage, while the soil erosion modulus below the edge of gully exhibited a linear decline along with the increase in siltation height.

Keywords

soil-and-water conservation Revised Universal Soil Loss Equation succession the Loess Plateau 

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Copyright information

© Science Press and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Haidong Gao
    • 1
  • Zhanbin Li
    • 1
    • 2
  • Peng Li
    • 2
  • Lianlian Jia
    • 3
  • Xiang Zhang
    • 2
  1. 1.Institute of Soil and Water ConservationCAS and Ministry of Water ResourcesYanglingShaanxi, China
  2. 2.Key Lab of Northwest Water Resources and Environment Ecology of Ministry of EducationXi’an University of TechnologyXi’anChina
  3. 3.Upper and Middle Yellow River BureauYellow River Conservancy Commission of the Ministry of Water ResourcesXi’anChina

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