梯田建设和淤地坝淤积对土壤侵蚀影响的定量分析

doi:10.11821/xb201205003

Abstract

Abstract: To research the terrace construction and check dam silting-up soil erosion effects, this paper firstly established a generalized model consisting of terrace, slope land, steep slope grassland, and check dam land in hilly and gully region of Loess Plateau, defined the pioneer phase, transitional phase and climax phase. Then it used the revised universal soil loss equation (RUSLE) to analyze soil erosion modulus in different periods. The results showed that pioneer phase and climax phase are the limit state of soil and water conservation. In pioneer phase, soil erosion modulus is 299.56 t×hm^-2×a^-1 and 136.64 t×hm^-2×a^-1 in the upper and lower parts of demarcation of hill and gully slope, respectively, and the average erosion modulus is 229.74 t×hm^-2×a^-1. In climax phase, soil erosion modulus is 39. 10 t×hm^-2×a^-1 and 1.10 t×hm^-2×a^-1 in the upper and lower parts, and the average erosion modulus is 22.81 t×hm^-2×a^-1. In the transitional phase, with the increase of the ratio of the terrace, soil erosion modulus index is reduced at upper Mao sideline; with the increase of the sedimentation of the height, soil erosion modulus shows a linear decrease at lower Mao sideline.

Key words: soil and water conservation, Loess Plateau, RUSLE, succession

GAO Haidong, LI Zhanbin, LI Peng, JIA Lianlian, ZHANG Xiang. Influences of Terrace Construction and Check Dam Silting-up on Soil Erosion[J].Acta Geographica Sinica, 2012, 67(5): 599-608.

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Influences of Terrace Construction and Check Dam Silting-up on Soil Erosion

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