[1]袁水龙,李占斌,张扬,等.黄土高原小流域坝地水分时空分布特征[J].水土保持研究,2018,25(03):29-34.
　YUAN Shuilong,LI Zhanbin,ZHANG Yang,et al.Impact of Layered Deposition on Temporal and Spatial Distribution Characteristic of Soil Moisture of Check Dam Land[J].Research of Soil and Water Conservation,2018,25(03):29-34.
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黄土高原小流域坝地水分时空分布特征

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 25 期数: 2018年03期 页码: 29-34 栏目: 出版日期: 2018-04-10
Title:
Impact of Layered Deposition on Temporal and Spatial Distribution Characteristic of Soil Moisture of Check Dam Land
作者:
袁水龙1,2, 李占斌2,3, 张扬1,2, 董起广1, 王丹2
1. 陕西地建土地工程技术研究院有限责任公司, 西安 710075;
2. 西安理工大学 西北旱区生态水利工程国家重点实验室培育基地, 西安 710048;
3. 中国科学院 水利部 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, 陕西 杨凌 712100
Author(s):
YUAN Shuilong1,2, LI Zhanbin2,3, ZHANG Yang1,2, DONG Qiguang1, WANG Dan2
1. Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an 710075, China;
2. State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi’an University of Technology, Xi’an 710048, China;
3. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
关键词:
淤地坝; 分层淤积; 土壤水分; 时空分布
Keywords:
check dam; layered deposition; soil moisture; temporal and spatial distribution
分类号:
S157
摘要:
为有效认识黄土高原淤地坝坝地土壤水分时空分布特征，通过对王茂沟小流域2号坝坝地土壤水分长期监测，分析了坝地土壤水分的统计特征。结果表明：（1） 坝地各层土壤水分均表现为中等变异，表层土壤含水量的极差较大，0~2.40 m土层土壤平均含水量变化范围为9.92%~23.70%，随深度的增加，土壤平均含水量表现为先减小后增大的趋势；（2） 坝地土壤水分具有明显的分层现象，多数监测点的土壤水分在时间上属于中等变异，表层土壤水分变化剧烈，随着深度的增加变异系数开始变小，水分变化程度减弱；根据变异系数的大小，坝地土壤水分可以划分为4个层次：水分剧变层（0~0.20 m），水分活跃层（0.20~0.60 m），水分次活跃层（0.60~1.40 m），水分相对稳定层（1.40 m以下）；（3） 坝前各层土壤含水量均明显高于坝中和坝后，在0~0.40 m坝地的含水量明显高于坡地，0.40~1.40 m坡地含水量高于坝地，1.40 m以下坝地含水量高于坡地，且坝地各层土壤含水量随时间的变异系数均小于坡地。
Abstract:
In order to effectively understand the spatial and temporal distribution characteristics of soil moisture in the check dam land of the Loess Plateau, we analyzed the statistical characteristic of soil moisture in check dam land through the long-term monitoring of soil moisture of the check dam No.2 in the Wangmaogou watershed. The results showed that:(1) the soil moisture in different soil layers moderately varied, among which the range of the surface layer was relatively larger; the water content of layer 0~2.4 m was between 9.92% and 23.70%, which tended to decrease at first and then increase with the increase of soil depth; (2) soil moisture of check dam land had an obvious stratification, which were moderately variable over time in most monitoring sites; the surface soil moisture changed sharply and its variation coefficient began to decrease with the increase of depth, which means the water change degree reduced; based on the variation coefficient, the soil moisture of check dam land could be divided into four levels:the drastic change layer (0~0.20 m), the active layer (0.20~0.60 m),the less active layer (0.60~1.40 m), the relatively stable layer (below1.40 m); (3) soil moisture contents of the different layers in front of dam were obviously higher than those of the dam and behind the dam. The soil moisture between 0~0.4 m and below 1.4 m layers of check dam land were significantly higher than that of slope land, while those between 0.40~1.40 m layer showed an opposite trend, and the variation coefficients of water contents over time of different soil layers in check dam land were all less than those of slope land.

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备注/Memo

收稿日期:2017-07-27;改回日期:2017-08-21。
基金项目:国家自然科学基金重点项目黄土高原生态建设的生态—水文过程响应机理研究（No.41330858）；陕西省重点科技创新团队计划项目（2016KCT-23）
作者简介:袁水龙(1990-)男,陕西扶风人,硕士,助理工程师,主要从事水文模型与水土保持研究。E-mail:yuanshuilong@163.com
通讯作者:李占斌(1962-)男,河南镇平人,博士,教授,主要从事土壤侵蚀与水土保持研究。E-mail:zhanbinli@126.com

更新日期/Last Update: 1900-01-01