基于TETIS模型的黑土区乌裕尔河流域径流与侵蚀产沙模拟研究

发布时间：2018-10-29 10:34

【摘要】：为科学地认识中国东北黑土区流域土壤侵蚀特征,探讨TETIS模型在该区的适用性,本文以乌裕尔河流域为例,利用1971-1987年日径流与泥沙实测数据对TETIS模型进行了校正与验证,进而分析了流域土壤侵蚀强度特征及其与坡度、土地利用方式的关系。研究结果表明:TETIS模型在乌裕尔河流域适用性好,日径流与日输沙量的纳什效率系数在0.52~0.70之间,决定系数在0.60~0.71之间,体积误差均不超过15%。流域平均侵蚀模数为397.2 t/(km2·a),流域以微度和轻度侵蚀为主,约90%的产沙来自于坡面。平均土壤侵蚀模数随坡度的增大而增大,流域侵蚀量主要来自于0°~5°坡面。不同土地利用方式具不同的土壤侵蚀模数,耕地土壤侵蚀模数最大,达556.3 t/(km2·a)。坡度较大的耕地和植被覆盖度较低的区域是水土流失治理的重点。研究表明,TETIS模型在黑土区模拟土壤侵蚀产沙应用前景好,可为研究区制定水土保持措施提供科学依据。
[Abstract]:In order to scientifically understand the characteristics of soil erosion in the black soil basin of Northeast China and discuss the applicability of TETIS model in this area, this paper takes the Wuyu River Basin as an example, and uses the daily runoff and sediment data from 1971 to 1987 to calibrate and verify the TETIS model. Furthermore, the characteristics of soil erosion intensity and the relationship between soil erosion intensity and slope and land use patterns were analyzed. The results show that the TETIS model has good applicability in the Wuyue River basin. The Nash efficiency coefficient of daily runoff and daily sediment transport is between 0.52 and 0.70, the determining coefficient is between 0.60 and 0.71, and the volume error is not more than 15. The average erosion modulus of the watershed is 397.2 t / (km2 a), basin is dominated by slight and mild erosion), and about 90% of the sediment yield comes from the slope. The average soil erosion modulus increased with the increase of slope, and the amount of erosion mainly came from 0 掳~ 5 掳slope. Different land use patterns have different soil erosion modulus, and the soil erosion modulus of cultivated land is the largest, reaching 556.3 t / (km2 a). Cultivated land with high slope and low vegetation coverage are the key points of soil erosion control. The results show that TETIS model has a good application prospect in simulating soil erosion and sediment yield in black soil area and can provide scientific basis for formulating soil and water conservation measures in the study area.
【作者单位】：中国科学院地理科学与资源研究所陆地水循环及地表过程重点实验室;中国科学院大学资源与环境学院;
【基金】：国家自然科学基金项目(41571271)~~
【分类号】：S157

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