基于栅格新安江模型的淮河上游土壤侵蚀预测

发布时间：2018-03-24 22:20

本文选题：栅格新安江模型　切入点：改进通用土壤侵蚀方程　出处：《南水北调与水利科技》2016年03期

【摘要】：将栅格新安江模型与改进通用土壤侵蚀方程进行耦合,建立基于栅格尺度的水沙模拟模型,以淮河上游息县水文站以上为研究区域,基于研究流域DEM数据、土地利用数据、土壤数据以及息县站2000年-2010年水文数据,模拟了淮河上游2000年-2010年输沙过程。并基于构建的水沙模型,结合流域2020年和2030年土地利用远景规划数据设定两种土地利用模式情景,定量分析了不同土地利用模式情景对流域土壤侵蚀的影响。研究结果表明:基于栅格新安江模型的水沙耦合模型在淮河上游具有较好的模拟精度,模拟的输沙量相对误差小于15%,确定性系数0.6以上,满足泥沙模拟精度要求;林地用地面积增加5%,流域土壤侵蚀量减少8.78%,城镇用地面积增加8%,流域土壤侵蚀量减少12.73%。研究成果可为淮河水土保持治理和规划提供参考。
[Abstract]:By coupling the grid Xinanjiang model with the improved general soil erosion equation, a raster-based simulation model of water and sediment is established. The study area is above Xixian hydrologic station in the upper reaches of Huaihe River, based on the DEM data and land use data. Soil data and hydrological data of Xixian station from 2000 to 2010 were used to simulate the sediment transport process in the upper reaches of Huaihe River from 2000 to 2010. Based on the constructed water and sediment model, two land use pattern scenarios were set up in combination with the land use long-term planning data of the basin for 2020 and 2030. The effects of different land use model scenarios on soil erosion were quantitatively analyzed. The results showed that the coupled model based on grid Xinanjiang model had good simulation accuracy in the upper reaches of Huaihe River. The relative error of sediment transport is less than 15 and the deterministic coefficient is more than 0.6, which can meet the requirement of sediment simulation precision. The area of forest land increased by 5%, the amount of soil erosion decreased by 8.78, the area of urban land increased by 8%, and the amount of soil erosion decreased by 12.73. The research results can provide reference for soil and water conservation management and planning of Huaihe River.
【作者单位】：四川建筑职业技术学院;
【分类号】：S157.1

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