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文摘
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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/(km~2· 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/(km~2· 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。 |
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其他语种文摘
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In order to understand the characteristics of soil erosion in a basin and explore the applicability of the TETIS model for simulating runoff and sediment yield in the black soil region of Northeast China, the Wuyuer River Basin was taken as an example in this study. Daily runoff and sediment discharge data series from 1971 to 1987 were used to calibrate and validate the TETIS model. On this basis, characteristics of soil erosion intensity and their relationships with slope and land use types in the basin were analyzed. The results show that the TETIS model has good applicability in the Wuyuer River Basin. Nash-Sutcliffe efficiency coefficients of daily discharge and sediment ranged from 0.52 to 0.70, coefficients of determination ranged from 0.60 to 0.71, and volume errors were no more than 15%. Average soil erosion intensity was 397.2 t/(km~2· a) in the basin. Slight erosion and light erosion were the dominant soil erosion types and about 90% of sediment yield was from hillslope. Average erosion intensity increased with increasing slope gradients. Slopes of 0°~5° were the main erosion area in the basin. Different land use types have different soil erosion intensities and arable land has the highest value (556.3 t/(km~2 · a)). Priority of erosion control should focus on the arable lands with steep slopes and low vegetation covered regions. Comparison of these simulation results with other study results in the black soil region of Northeast China demonstrates a promising future of the TETIS model for simulating runoff and sediment yields in the region. This study may provide a scientific basis for the implementation of soil and water conservation measures in the study area. |
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来源
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地理科学进展
,2017,36(7):873-885 【核心库】
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DOI
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10.18306/dlkxjz.2017.07.009
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关键词
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TETIS模型
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东北黑土区
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乌裕尔河流域
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土壤侵蚀模拟
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地址
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中国科学院地理科学与资源研究所, 中国科学院陆地水循环及地表过程重点实验室, 北京, 100101
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-6301 |
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学科
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农业基础科学 |
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基金
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国家自然科学基金项目
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文献收藏号
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CSCD:6044794
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