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

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文摘 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, respec- tively). 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.
来源 Journal of Geographical Sciences ,2012,22(5):946-960 【核心库】
DOI 10.1007/s11442-012-0975-5
关键词 soil-and-water conservation ; Revised Universal Soil Loss Equation ; succession ; the Loess Plateau
地址

1. Institute of Soil and Water Conservation, CAS and Ministry of Water Resources, Shaanxi, Yangling, 712100  

2. Institute of Soil and Water Conservation, CAS and Ministry of Water Resources, Key Lab of Northwest Water Resources and Environment Ecology of Ministry of Education, Shaanxi, Yangling, 712100  

3. Xi'an University of Technology, Key Lab of Northwest Water Resources and Environment Ecology of Ministry of Education, Xi'an, 710048  

4. Upper and Middle Yellow River Bureau, Yellow River Conservancy Commission of the Ministry of Water Resources, Xi'an, 710021

语种 英文
ISSN 1009-637X
学科 自然地理学
基金 国家973计划 ;  National Natural Sci- ence fundation of China
文献收藏号 CSCD:4695625

参考文献 共 30 共2页

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引证文献 6 篇

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