基于RUSLE模型的抚仙湖流域土壤侵蚀时空分布特征被引量：1

Spatial and Temporal Distribution Characteristics of Soil Erosion in Fuxian Lake Basin Based on RUSLE Model

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摘要土壤侵蚀是引起区域生态环境问题的主要因素之一,也是水土保持研究的重要内容.因此基于GIS技术和修正的土壤流失方程(RUSLE)对抚仙湖流域2000~2018年土壤侵蚀的时空分布格局进行定量研究.结果表明:2000年、2005年、2010年、2015年和2018年全流域平均土壤侵蚀模数分别为117.41 t/(km^(2)·a)、123.13 t/(km^(2)·a)、85.49 t/(km^(2)·a)、100.49 t/(km^(2)·a)和72.0 t/(km^(2)·a),土壤侵蚀总量分别为7.92万(t/a)、8.37万(t/a)、5.76万(t/a)、6.77万(t/a)和4.85万(t/a).RUSLE模拟结果显示五车河土壤侵蚀量为744.118 t/a,通过与实测值(718.29 t/a)对比,相对误差为3.59%,误差较小,该模型可以应用于抚仙湖流域土壤侵蚀研究.抚仙湖流域土壤侵蚀以微度侵蚀和轻度侵蚀为主,微度侵蚀面积占土地总面积的94.29%,说明抚仙湖流域整体水土保护情况良好.RUSLE模型预测,抚仙湖在2016~2035年出现暖干的现象,土壤侵蚀会有一定减少,2046~2065年和2080~2099年降水增加,土壤侵蚀会有增加.应该提前做好抚仙湖流域的水土保持规划. Based on GIS technology and Revised Universal Soil Loss Equation(RUSLE),this paper makes a quantitative study on the temporal and spatial distribution pattern of soil erosion in Fuxian Lake Basin from 2000 to 2018.The results show that the average soil erosion modulus in 2000,2005,2010,2015 and 2018 were 117.41 t/(km^(2).a),123.13 t/(km^(2).a),85.49 t/(km^(2).a),100.49 t/(km^(2).a)and 72.0 T/(km^(2).A);the total amount of soil erosion was 79,200(t/a),83,700(t/a),57,600(t/a),67,700(t/a)and 48,500(t/a),respectively.RUSLE simulation results show that the amount of soil erosion in Wuche River is 744.118 t/a.Its comparison with the measured value(718.29 t/a)shows a small relative error 3.59%.The model can be applied to the study of soil erosion in Fuxian Lake Basin.The soil erosion in Fuxian Lake Basin is mainly micro erosion and mild erosion,and the micro erosion area accounts for 94.29%of the total land area,indicating that the overall water and soil protection in Fuxian Lake Basin is good.RUSLE model predicts that Fuxian Lake will be warm and dry from 2016 to 2035,and soil erosion will decrease to a certain extent.With the increase of precipitation from 2046 to 2065 and 2080 to 2099,soil erosion will increase.The water and soil conservation planning of Fuxian Lake Basin should be done in advance.

作者赵健霞李奎段立曾 ZHAO Jianxia;LI Kui;DUAN Lizeng(School of Geography and Territorial Engineering,Yuxi Normal University,Yuxi 653100,China;Affiliated High School of Yuxi Normal University,Yuxi 653100,China;Yunnan University,Kunming 650500,China)

机构地区玉溪师范学院地理与国土工程学院玉溪师范学院附属中学云南大学

出处《玉溪师范学院学报》 2022年第3期47-56,共10页 Journal of Yuxi Normal University

基金云南省应用基础研究计划青年项目(项目编号:2016FD111).

关键词抚仙湖流域 RUSLE模型土壤侵蚀水土流失水土保持 Fuxian Lake Basin RUSLE model soil erosion soil and water loss soil and water conservation

分类号 S159 [农业科学—土壤学]

作者简介赵健霞,硕士,讲师,研究方向:自然地理学;通讯作者:李奎,硕士,中学二级教师,研究方向:自然地理学.