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水蚀风蚀交错带小流域淤地坝泥沙沉积特征
王永吉1; 杨明义1,2; 张加琼1,2; 张风宝1,2; 赵恬茵1
2017
Source Publication水土保持研究
Volume24Issue:2Pages:1-5
Abstract

淤地坝泥沙沉积特征是小流域土壤侵蚀及坝地内泥沙运移沉积过程的信息载体。通过对水蚀风蚀交错带典
型坝地内不同剖面中泥沙沉积旋回厚度及粒径组成变化的分析,初步探讨了坝地内泥沙沉积空间分布特征及对小流
域土壤侵蚀和泥沙运移沉积过程的响应。结果表明:坝地泥沙沉积旋回厚度从坝尾到坝前呈现不均匀变化,但沉积
旋回厚度总体呈逐渐变薄的趋势,沉积旋回中沙层厚度普遍大于粘层厚度;坝地内不同剖面沉积旋回泥沙主要由细
砂粒组成,其平均含量为59.8%,其次为粉砂粒(23.4%),黏粒(11.2%)和粗砂粒(5.6%)含量较少;从坝前到坝尾各
个剖面中沉积泥沙颗粒组成粗化度逐渐增大,且沉积旋回中沙层的粗化度变化大于粘层的变化。初步揭示了淤地坝
沉积泥沙从坝尾到坝前的沉积规律,可以为以后相关工作的开展提供参考。

Other Abstract

Check dam and sediment deposition characteristics play the important role in studying the progress
of eroded sediment migration and characteristics.In this paper,we analyzed the thickness and grain composition
of sediment in different soil profiles in check dam in wind-water erosion cross region,we discussed the
spatial distribution characteristics of sediment,and its response to soil erosion and sediment transport
process.The results show that the sediment presents a non-uniform change from the tail to the front of the
dam,but the layers of sedimentary cycle gradually becomes thin as a whole,the thickness of the sandy layer
is generally greater than that of the clayey layer;the sediment in different location of dam is mainly composed
of the fine sand,the average content of fine sand is 59.77%,followed by silt(23.41%),clay(11.21%),
coarse sand(5.62%);deposition of sediment particles gradually become coarse from the tail to the front of
the dam,and coarsening degree becomes greater,the coarsening degree of sand horizon is bigger than that of
the clayey layer

Keyword黄土高原水蚀风蚀交错带 水土保持 沉积旋回 颗粒组成 粗化度 厚度
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8469
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室
2.中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
王永吉,杨明义,张加琼,等. 水蚀风蚀交错带小流域淤地坝泥沙沉积特征[J]. 水土保持研究,2017,24(2):1-5.
APA 王永吉,杨明义,张加琼,张风宝,&赵恬茵.(2017).水蚀风蚀交错带小流域淤地坝泥沙沉积特征.水土保持研究,24(2),1-5.
MLA 王永吉,et al."水蚀风蚀交错带小流域淤地坝泥沙沉积特征".水土保持研究 24.2(2017):1-5.
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