改进的通用土壤侵蚀方程在辽宁西部水土流失区的适用性研究
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摘要
为分析改进通用土壤侵蚀方程在区域土壤侵蚀计算中的适用性,以辽西两个水土流失较为严重的区域为研究实例,进行水土流失计算的适用性分析,并结合实测水土流失数据对比改进方程与传统方程的水土流失模拟精度,结果表明,改进方程可综合考虑地表径流及降雨因子对区域水土流失的影响,相比于传统方程仅考虑降雨因子,水土流失计算精度得到明显提高,方程改进后,两个区域水土流失模拟相对误差均值分别降低14. 85%和16. 9%,绝对误差均值分别减少2. 7万t和0. 6万t。研究成果对于北方干旱半干旱区域水土流失计算具有较为重要的参考价值。
In order to analyze the applicability of MULSE in soil erosion calculation,taking two regions with serious soil erosion in western Liaoning as an example,this paper analyzed the applicability of soil erosion calculation and compared the simulation accuracy of improved equation and traditional equation by the measured soil and water loss data. The results showed that the improved equation could comprehensively consider the effects of surface runoff and rainfall factors on regional soil erosion. Compared with the traditional equations,which only took rainfall factors into account,the calculation accuracy of soil erosion was obviously improved. After the improvement,the mean relative errors of soil and water loss simulation in the two regions were reduced by 14. 85% and 16. 9%,respectively,while the mean absolute error was reduced by 2. 7 and 0. 6 million t,respectively. The research results had important reference value for the prediction of soil erosion in arid and semi-arid regions in northern China.
In order to analyze the applicability of MULSE in soil erosion calculation,taking two regions with serious soil erosion in western Liaoning as an example,this paper analyzed the applicability of soil erosion calculation and compared the simulation accuracy of improved equation and traditional equation by the measured soil and water loss data. The results showed that the improved equation could comprehensively consider the effects of surface runoff and rainfall factors on regional soil erosion. Compared with the traditional equations,which only took rainfall factors into account,the calculation accuracy of soil erosion was obviously improved. After the improvement,the mean relative errors of soil and water loss simulation in the two regions were reduced by 14. 85% and 16. 9%,respectively,while the mean absolute error was reduced by 2. 7 and 0. 6 million t,respectively. The research results had important reference value for the prediction of soil erosion in arid and semi-arid regions in northern China.
引文
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[12]侯伟,廖晓勇,张岩,等.三峡库区典型小流域SWAT模型基础数据库构建[J].西藏大学学报(自然科学版),2015,30(2):118-124.
[13]蔡涛,于岚岚.非线性时变增益模型在辽宁西部旱区洪水预测的应用研究[J].人民珠江,2018,39(3):34-37+48.
[2]通用土壤流失方程USLE简介[J].水利规划与设计,2016(4):61.
[3]李彦涛.通用土壤流失方程在蓟县山区水土流失监测中的应用[J].海河水利,2015(6):59-61.
[4]刘赞,胡庭兴,赵安玖,等.基于通用土壤流失方程的长江防护林区的土壤侵蚀动态特征——以湖北省红安县倒水河流域为例[J].四川农业大学学报,2009,27(3):295-301.
[5]毕华兴,朱金兆,吴斌.国外土壤侵蚀与流域产沙模型研究综述[J].北京林业大学学报,1995(3):79-85.
[6]YANG C S,LI Q F,WEN H Y,et al. Simulation of Soil and Water Loss in the Upper Huaihe River Basin using the Xinanjiang Model[J]. Procedia Engineering,2012,28(12):501-505.
[7] MEQAUNINT A,SELESHI A. SWAT based runoff and sediment yield modelling:a case study of the Gumera watershed in the Blue Nile basin[J]. Ecohydrology& Hydrobiology,2010,10(2-4):191-199.
[8]WIKTOR H,EDYTA K,MAREK R. Loss of topsoil and soil erosion by water in agricultural areas:A multi-criteria approach for various land use scenarios in the Western Carpathians using a SWAT model[J]. Land Use Policy,2018,73:363-372.
[9]YESUF H M,ASSEN M,ALAMIREW T,et al. Modeling of sediment yield in Maybar gauged watershed using SWAT,northeast Ethiopia[J]. Catena,2015,127:191-205.
[10]刘晓哲.改进的通用土壤侵蚀方程在流域水土流失模拟中的运用[J].水利规划与设计,2016(4):69-71.
[11]刘海涛.基于改进通用土壤侵蚀方程的水土流失时空模拟——以淮河上游为例[J].人民长江,2016,47(4):17-19.
[12]侯伟,廖晓勇,张岩,等.三峡库区典型小流域SWAT模型基础数据库构建[J].西藏大学学报(自然科学版),2015,30(2):118-124.
[13]蔡涛,于岚岚.非线性时变增益模型在辽宁西部旱区洪水预测的应用研究[J].人民珠江,2018,39(3):34-37+48.