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| Regional division for soil and water conservation based on Bayes discriminant analysis model |
| Wu Haibo1, Zhao Xiaoshen1, Wang Zhiguo2 , Zhang Chao1 |
| 1.North China University of Water Resources and Electric Power,450011, Zhengzhou;2.Water Resources and Hydropower Planning and Design General Institute, MWR, 100011, Beijing: China |
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Abstract In order to divide the districts of soil and water conservation in Hilly-gullied areas of the Loess Platean Gansu Province, Ningxia Province, and Qinghai Province reasonablely, regional division mathematical model of soil and water conservation was established based on Bayes discriminant analysis theory. Combining the natural conditions, social economic conditions and the characteristics of soil and water resources loss in Gansu Province, Ningxia Province and Qinghai Province, six indexes were chosen to be discriminant factors such as: cultivation rate, forestry and grass coverage rate, population density, grain production per unit area, rainfall, and evaporation. The calculation and analysis show that it’s in accordance with the result of the division of soil erosion types, and in accordance with the actual regional division in Gansu Province, Ningxia Province and Qinghai Province. It can be promoted in other regional division for soil and water conservation with the accuracy rate 100%.
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Received: 23 May 2011
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