[1]张玮,杨明义,张风宝,等.黄丘区小流域坝地沉积泥沙粒径剖面分布特征[J].水土保持研究,2015,22(02):17-21.
　ZHANG Wei,YANG Mingyi,ZHANG Fengbao,et al.Profile Distribution of Particle Size of Sediment at a Check Dam in a Small Watershed of the Loess Plateau[J].Research of Soil and Water Conservation,2015,22(02):17-21.
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黄丘区小流域坝地沉积泥沙粒径剖面分布特征

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 22 期数: 2015年02期 页码: 17-21 栏目: 出版日期: 2015-04-28
Title:
Profile Distribution of Particle Size of Sediment at a Check Dam in a Small Watershed of the Loess Plateau
作者:
张玮1, 杨明义1,2, 张风宝1,2, 张加琼1, 赵恬茵1
1. 西北农林科技大学 水土保持研究所, 陕西 杨凌 712100;
2. 中国科学院 水利部 水土保持研究所, 陕西 杨凌 712100
Author(s):
ZHANG Wei1, YANG Mingyi1,2, ZHANG Fengbao1,2, ZHANG Jiaqiong1, ZHAO Tianyin1
1. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
关键词:
土壤侵蚀; 沉积旋回; 粒径; 黄土高原; 淤地坝
Keywords:
soil erosion; cycle of sedimentation; particle size; check dam; Loess Plateau
分类号:
S157
摘要:
坝地沉积泥沙记录了坝控小流域内土壤侵蚀特征及侵蚀环境演变的相关信息，是研究流域土壤侵蚀的重要媒介。研究通过在淤地坝内洪水冲开的一个11.66 m的垂直剖面上按沉积旋回自下而上分层取样，分析沉积泥沙不同组分百分含量、特征粒径的剖面变化规律。结果表明：1）淤地坝内沉积泥沙主要以粗粉粒（0.01～0.05 mm）为主，其平均含量为53.61%，且变异系数最小；2）个别层次出现粗砂（0.25～1 mm），粗颗粒泥沙的出现对流域内大暴雨有一定的指示作用；3）沉积剖面的0～67 cm为累积耕作层，该层的出现具有一定的时标意义；4）淤地坝沉积剖面存在粒径变异的转折点（600 cm），该点可用来衡量水沙动力条件和沟道比降对泥沙粒径分布所起的作用。
Abstract:
The sediment is an important medium for retrieval of the soil erosion characteristics, which indicates the important information about the environmental processes in relation to soil erosion and deposition. We analyzed the variation of the different components，percentages and the characteristics of particle sizes, which were sampled from a 11.66 m depth soil profile in the typical check dam on the Loess Plateau. The result showed that:1)the deposition sediment mainly contains coarse silt(0.25～1 mm) with the average content of 53.61%, and the coefficient of variation was minimum; 2) sand(0.25～1 mm) was found only in a few layers, indicating the heavy rain in watershed; 3) there was an accumulated cultivated layer at the depth of 0—67 cm in the profile, which had indicative role for special time; 4) there was a turning point(600 cm) in the profile, which can be used to measure the effect of the water and sediment conditions and channel gradient, and had an indicative role for the sediment erosion environment of check dam.

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备注/Memo

收稿日期:2014-09-30;改回日期:2014-11-16。
基金项目:水利部公益性行业科研专项经费项目（201201084）；水利部黄土高原水土流失过程与控制重点实验室开放基金（201202）；中国科学院重点部署项目（KZZD-EW-04-03）；西北农林科技大学基本科研业务费专项经费项目（QN2011146）
作者简介:张玮(1989-),女,山西省长治人,硕士研究生,主要从事土壤侵蚀方面的研究。E-mail:835153093@qq.com
通讯作者:杨明义(1970-),男,山东莱州人,博士,研究员,主要从事土壤侵蚀核示踪技术研究。E-mail:ymyzly@163.com

更新日期/Last Update: 1900-01-01