Land conservation practices induced by soil loss simulation with GIS in Loess Plateau, China
A typical small watershed (5.91km2) located in the Loess Plateau (Mizhi County, Shanxi Province, China) was selected for the trial study. The objective of this study was to quantify the amount of soil eroded under current land use and to predict soil loss according to different conservation measurem...
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Published in | Journal of Irrigation Engineering and Rural Planning Vol. 1996; no. 30; pp. 48 - 61 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
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The Japanese Society of Irrigation, Drainage and Rural Engineering
1996
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Abstract | A typical small watershed (5.91km2) located in the Loess Plateau (Mizhi County, Shanxi Province, China) was selected for the trial study. The objective of this study was to quantify the amount of soil eroded under current land use and to predict soil loss according to different conservation measurements simulated with pc-ARC/INFO GIS (Geographical Information System) on the principle of the USLE (Universal Soil Loss Equation). Thematic maps of the watershed related to land use, soil, soil erosion, and land type were drawn from aerial photo field surveying, and the slope map was derived from DTM (Digital Terrain Model) analysis. The rill and interrill erosion region where most of the crops are planted was extracted from the watershed based on the concept of the division of geomorphological characteristics and erosive types. Through overlaying of thematic maps, a distributive map unit was generated with an attached attributive data file that consists of all necessary information for soil loss quantification and land evaluation and planning. The amount of soil loss under present land use was calculated and used as the baseline for comparing soil loss under different conservation simulations. Land use planning was conducted with the methodology of linear planning, and it was dependent on the results of land quality evaluation and the possibility of economic development prediction in the village. The potential soil loss was evaluated and compared to simulations of other biological and engineering land conservation practices. The results by computer simulation showed that both biological and engineering countermeasures can effectively protect soil against water erosion. However, the best approach was the combination of terrace engineering and the adjustment of land use pattern, which was based on linear planning of the general development of the watershed. |
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AbstractList | A typical small watershed (5.91km2) located in the Loess Plateau (Mizhi County, Shanxi Province, China) was selected for the trial study. The objective of this study was to quantify the amount of soil eroded under current land use and to predict soil loss according to different conservation measurements simulated with pc-ARC/INFO GIS (Geographical Information System) on the principle of the USLE (Universal Soil Loss Equation). Thematic maps of the watershed related to land use, soil, soil erosion, and land type were drawn from aerial photo field surveying, and the slope map was derived from DTM (Digital Terrain Model) analysis. The rill and interrill erosion region where most of the crops are planted was extracted from the watershed based on the concept of the division of geomorphological characteristics and erosive types. Through overlaying of thematic maps, a distributive map unit was generated with an attached attributive data file that consists of all necessary information for soil loss quantification and land evaluation and planning. The amount of soil loss under present land use was calculated and used as the baseline for comparing soil loss under different conservation simulations. Land use planning was conducted with the methodology of linear planning, and it was dependent on the results of land quality evaluation and the possibility of economic development prediction in the village. The potential soil loss was evaluated and compared to simulations of other biological and engineering land conservation practices. The results by computer simulation showed that both biological and engineering countermeasures can effectively protect soil against water erosion. However, the best approach was the combination of terrace engineering and the adjustment of land use pattern, which was based on linear planning of the general development of the watershed. |
Author | Xie, Y Lin, P Nakano, M Dunyao, Z Liu, L |
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References | 1) Hillel, D. J.: Out of the Earth: Civilization and the Life of the Soil, The Free Press, 1991. 4) Wischmeier, W.H., and Smith, D.D, : Rainfall Energy and Its Relationship to Soil Loss, Trans. Am. Geophys. U., 39, 285, 1958. 6) Xi, J, Z.: A Study of Soil Loss Prediction Equation of Water Erosion, The Journal of China Soil and Water Conservation, No.6, 1983 (In Chinese 5) Wischmeier, W.H., and Smith, D.D.: Predicting Rainfall-Erosion Losses. Agriculture Handbook No.537. U.S. Department of Agriculture, Washington, D.C., 1978. 3) Sys, : Land Evaluation (I, II, III), Gent University Press, 1986. 2) Lin, P.: Remote Sensing Application in Loess Plateau, Beijing University Press, 1990. (In Chinese 7) Zhu, X, M.: Loess Plateau Overall Conservation, Academic Science Press, 1989 (In Chinese |
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Snippet | A typical small watershed (5.91km2) located in the Loess Plateau (Mizhi County, Shanxi Province, China) was selected for the trial study. The objective of this... |
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SubjectTerms | computer simulation erosion control geographic information systems land evaluation land use loess soils losses from soil mizhi county, shanxi province, china pc-arc/info (geographical information system) plateaus soil conservation Universal Soil Loss Equation water erosion watersheds |
Title | Land conservation practices induced by soil loss simulation with GIS in Loess Plateau, China |
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