Advances in Earth Science ›› 2007, Vol. 22 ›› Issue (3): 241-248. doi: 10.11867/j.issn.1001-8166.2007.03.0241

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Application of Integrated Method to Assessment of Soil and Nutrient Losses in Miyun Reservoir Basin

XIA Li-zhong 1, BU Zhao-hong 1, ZHANG Zu-xing 2, YANG Lin-zhang 1, YANG Xiao-yong 2, JIANG Xiao-san 3   

  1. 1.Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008,China;2.Haihe Water Conservancy Commission, Ministry of Water Resources, Tianjin 300170,China;3.College of Resources and Enviromental Sciences, Nanjing Agriculture University, Nanjing 210095,China
  • Received:2006-08-28 Revised:2007-01-23 Online:2007-03-10 Published:2007-03-10

XIA Li-zhong, BU Zhao-hong, ZHANG Zu-xing, YANG Lin-zhang, YANG Xiao-yong, et al. Application of Integrated Method to Assessment of Soil and Nutrient Losses in Miyun Reservoir Basin[J]. Advances in Earth Science, 2007, 22(3): 241-248.

Based on the universal soil loss equation(USLE) and the revised universal soil loss equation ( RUSLE), integrated monitoring method for assessment of soil and nutrients losses has been calibrated by statistics of the data from runoff experiment plots and hydrological monitoring stations in the provinces of Shandong, Jiangsu, Fujian, Jiangxi and Hebe in China an area of more than 200 thousand km2. In this paper, the method was used for the assessment of soil and nitrogen losses in 2001in Miyun Reservoir Basin(115°25′E~117°35′E , 40°20′N~41°37′N), which possess an area of 15 365 km2 and is located in Hebei province. The spatial distribution of soil and nitrogen losses was calculated by GIS,RS and GPS technology and models, and the sand and nitrogen delivering ratios were also calculated. The accuracy of the monitoring method was tested by comparing the simulated values with that observed by hydrological monitoring station for the sediment and nitrogen delivered out off the catchment. The total simulated soil and nitrogen loss of Miyun Reservoir basin in 2001 was 14 617 782.10 t/a and 19 527.90 t/a respectively, and the sediment and nitrogen delivered into the reservoir was 634 332.80 t/a and 612.97 t/a respectively. The test showed the relative error of the simulated values with that observed by hydrological monitoring station was 2.75%~19.63% and -18.78% for sediment and nitrogen delivered into the reservoir in 2001 respectively. Because of its preferable accuracy, convenience, timesaving, easy for updating, the integrated monitoring method for the assessment of soil and nutrients losses is prospective for application in the erosive regions. 

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