三峡库区菱角塘小流域土壤侵蚀量和泥沙输移比研究
Sediment delivery ratio and soil erosion quantity on Lingjiaopond small watershed in the Three Gorges Reservoir Region
查看参考文献25篇
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文摘
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泥沙输移比对正确评价水土保持减沙效益具有重要意义。以三峡库区菱角塘小流域为研究对象,在应用~(137)Cs示踪技术测定塘库和谷地泥沙沉积量的基础上,计算了小流域1963 - 2013年土壤侵蚀量和泥沙输移比,并讨论了采用不同侵蚀量算法计算的小流域泥沙输移比差异特征。结果表明:菱角塘小流域塘库和谷地水稻田泥沙沉积量分别为1 835.75 t和3 781.80 t;基于本文的测定法、常用的插值法和模型法计算的小流域土壤侵蚀量分别为5 821.52 t、7 240.50 t和10 504.25 t;不同侵蚀量算法计算的菱角塘小流域泥沙输移比差异明显。应用本文提出的~(137)Cs测定塘库和谷地泥沙沉积量的测定法,计算的库区小流域土壤侵蚀量和泥沙输移比相对合理可靠,具有一定的参考价值。 |
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其他语种文摘
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Sediment delivery ratio is critical in evaluating sediment yield reduction caused by soil and water conservation. The Lingjiao Pond small watershed in the central area of the Three Gorges Reservoir was investigated. Soil erosion amount and SDR were calculated on the basis of pond and paddy fields deposition determined by ~(137)Cs tracing technique for 1963 - 2013 years. Difference characteristics were proposed for SDR with three types of soil erosion amount estimation. Results showed that deposition amounts in pond and paddy fields in the study area was 1,835.75t and 3,781.80t,respectively. Soil erosion amount estimated by determination, interpolation as well as model method was 5,821.52 t,7,240.50 t and 10,504.25 t,respectively. SDR for 1963 - 2013 years in the small watershed differed apparently when different soil erosion amount estimation was utilized. Results of soil erosion amount and SDR were reliable with application of the determination method ( valley and pond sedimentation amount determined by ~(137)Cs technique) proposed in this study. |
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来源
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泥沙研究
,2018,43(2):67-72 【核心库】
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DOI
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10.16239/j.cnki.0468-155x.2018.02.011
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关键词
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泥沙输移比
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小流域
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~(137)Cs
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泥沙平衡
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土壤侵蚀量
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地址
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1.
宝鸡文理学院地理与环境学院, 陕西省灾害监测与机理模拟重点实验室, 陕西, 宝鸡, 721013
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中国科学院-水利部成都山地灾害与环境研究所, 山地表生过程与生态调控中国科学院重点实验室, 四川, 成都, 610041
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万源市水土保持局, 四川, 达州, 636350
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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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0468-155X |
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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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中科院STS项目
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国家重点研发计划项目
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宝鸡文理学院重点项目
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文献收藏号
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CSCD:6223929
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