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基于WaTEM/SEDEM模型的沂河流域土壤侵蚀产沙模拟
引用本文:李子君,许燕琳,王海军,马良,姜爱霞. 基于WaTEM/SEDEM模型的沂河流域土壤侵蚀产沙模拟[J]. 地理研究, 2021, 40(8): 2380-2396. DOI: 10.11821/dlyj020200714
作者姓名:李子君  许燕琳  王海军  马良  姜爱霞
作者单位:1. 山东师范大学地理与环境学院,济南 2503582. 山东省水文局水情处,济南 2500143. 山东省水利科学研究院 山东水土保持学会,济南 250013
基金项目:山东水土保持学会重点领域创新资助项目(2019003);山东省自然科学基金项目(ZR2020MD008);国家自然科学基金项目(41101079)
摘    要:基于WaTEM/SEDEM模型,结合临沂水文站和角沂水文站的输沙数据对模型进行校正和验证,分析模拟1975-2015年沂河流域侵蚀产沙的时空变化特征,并进一步研究降水、地形位和土地利用变化对流域侵蚀产沙的影响.结果 表明:①沂河流域输沙能力系数Ktc-low和Ktc-high曲在40 m和150m组合下效果最优,模型在...

关 键 词:WaTEM/SEDEM模型  土壤侵蚀产沙  时空变化  土地利用  沂河流域
收稿时间:2020-07-27

Modeling soil erosion and sediment yield using WaTEM/SEDEM for Yihe River Basin
LI Zijun,XU Yanlin,WANG Haijun,MA Liang,JIANG Aixia. Modeling soil erosion and sediment yield using WaTEM/SEDEM for Yihe River Basin[J]. Geographical Research, 2021, 40(8): 2380-2396. DOI: 10.11821/dlyj020200714
Authors:LI Zijun  XU Yanlin  WANG Haijun  MA Liang  JIANG Aixia
Affiliation:1. College of Geography and Environment, Shandong Normal University, Jinan 250358, China2. Hydrological Department of Shandong Provincial Bureau of Hydrology, Jinan 250014, China3. Water Resources Research Institute of Shandong Province, Shandong Society of Soil and Water Conservation, Jinan 250013, China
Abstract:Based on the WaTEM/SEDEM model calibrated and verified by the sediment transport data from Linyi and Jiaoyi hydrological stations, this paper analyzed and simulated the characteristics of spatio-temporal variation of soil erosion and sediment yield in the Yihe River Basin from 1975 to 2015, and further studied the effects of precipitation, terrain and land use changes on soil erosion and sediment yield in the basin. The results showed that: (1) The sediment carrying capacity coefficients Ktc-low and Ktc-high in the basin were optimal under the combined effect of 40 m and 150 m, and the model had good applicability. (2) From 1975 to 2015, the basin was dominated by soil erosion, and the area of micro soil erosion was the largest, followed by severe soil erosion, and soil deposition was mainly distributed in the valley. Soil erosion intensity increased first and then decreased, and the soil erosion modulus increased from 30.92 t·hm-2·a-1 in 1975 to 49.32 t·hm-2·a-1 in 1995, then decreased to 29.60 t·hm-2·a-1 in 2015. The average soil erosion modulus of each county (district) was listed in an order of Yishui county > Feixian county > Yinan county > Yiyuan county > Mengyin county > Pingyi county > Lanshan district. (3) The variation of soil erosion intensity was the result of the comprehensive effects of precipitation, terrain and land use. From 1975 to 2015, the rainfall erosivity of the basin showed a trend of first decreasing, then increasing and decreasing again. The average rainfall erosivity of each county (district) was in an order of Feixian county > Lanshan district > Yinan county > Mengyin county > Pingyi county > Yishui county > Yiyuan county, and the spatio-temporal variation of rainfall erosivity were not completely consistent with that of the soil erosion intensity. The spatial distribution of terrain niche grade basically coincided with that of the soil erosion intensity. The dominant terrain niche range of soil erosion was 4-6 grades, which meant that the elevation was 75-428 m, and the slope gradient was 5°-39°. The transformation between cultivated land and forest land was the main reason for the conversion of soil erosion intensity. The area of erosion intensity increased by 3389.97 hm 2·a-1 when forest land was transformed into cultivated land, and decreased by 2216.65 hm2·a-1 when farmland was converted to forest land. However, the conversion of grassland and other land use types had less impact on the soil erosion intensity of the basin. This study can provide a reference for regional land use pattern adjustment and soil erosion control.
Keywords:WaTEM/SEDEM model  soil erosion  spatio-temporal variation  land use  Yihe River Basin  
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