ISWC OpenIR  > 水保所知识产出(1956---)
粗质地土壤坡度和前期含水量对土壤侵蚀的影响
游微1,2; 樊军
2017-08
Source Publication水土保持学报
description.correspondentemailfanjun@ms.iswc.ac.cn
Volume31Issue:4Pages:18-24
Abstract
利用野外模拟降雨试验,研究了粗质地土壤裸地和苜蓿地在不同坡度( 5° ,
15° , 25° )、不同前期含水量
(低、中、高)条件下坡面降雨产流、产沙的过程及其特征,以此探究该区退耕还草效益。结果表明: 3 种坡度
条件下裸地和苜蓿地的产流过程在不同前期含水量下均为先增大后趋于稳定,不同坡度之间的径流量差
异不显著,但泥沙流失量随着坡度的增大而显著增加,在降雨过程中先增大达到峰值趋于稳定波动,裸地
的波动幅度大于苜蓿地。 2 种处理的前期含水量对径流量以及平均入渗率的影响均达显著水平,裸地在相
同的坡度下,前期含水量由低水平增加到中水平、低水平增加到高水平,径流量分别增加 38.2%~52.8% ,
39.7%~42.8% ,苜蓿地径流量分别增加 27.3%~77.8% , 45.5%~91.1% 。坡度对泥沙流失量及含沙率
影响显著,在相同的前期含水量下,裸地由 5° 增加到 15° , 15° 增加到 25° 的泥沙流失量分别增加 96.3%~
268.7% , 6.9%~40.3% ,苜蓿地的泥沙流失量分别增加 81.1%~384.2% , 61.7%~169.9% 。在相同坡
度和前期含水量下,苜蓿地的径流量和泥沙流失量均显著低于裸地。研究结果表明粗质地土壤前期含水
量和坡度显著影响坡地土壤侵蚀过程和总量,植被不但因为冠层拦截而减少径流,而且因为耗水量增加,
降低了土壤前期含水量而减水减沙。
Other Abstract

The effects of slope gradients and antecedent soil water content on the characteristics and interactions of rainfall runoff and sediment on bare land and alfalfa land were investigated under the simulated rainfall experiment of coarse texture soil. The experiment treatment included three slopes(5°, 15° and 25°)and three antecedent soil water content(low, middle and high).Studying the effects of slope gradients and antecedent soil water content on coarse texture soil erosion is to clarify the efficiency of the project of The Grain to Green. The results show that, the processes of runoff on bare land and alfalfa land were at first increased and then trending to be stable under different slopes and antecedent soil water content, the impact of slopes on runoff volume is unapparent, but sediment losses were greatly increased with the increasing of slopes, which is increased the peak and tending to be stable fluctuations during the process of rainfall, the magnitude of bare land’s fluctuation is higher than alfalfa land. The runoff volume and the mean infiltration were greatly affected by antecedent soil water content. Under the same slope gradient, when antecedent soil water content increased from low to middle, and from low to high, the runoff volume of bare land increased 38.2%~52.8%, 39.7%~42.8%, and the runoff volume of alfalfa land increased 27.3%~77.8%, 45.5%~91.1%. Slope had a significant influence onsediment losses and sediment concentration. Under the same antecedent soil water content, when slope increased from 5° to 15°, and from 15° to 25°, the sediment losses of bare land increased 96.3%~268.7%, 6.9%~40.3%, and the sediment losses of alfalfa land increased 81.1%~384.2%, 61.7%~169.9%. The result showed runoff volume and sediment losses of alfalfa land were significantly lower than bare land at same slope and antecedent soil water content. Antecedent soil water content and slope of coarse texture soil played important roles on the process and amount of soil erosion. The vegetation not only reduces runoff by canopy interception, but also decreases antecedent soil water content through consuming soil moisture.

Keyword黄土高原 人工模拟降雨 径流 泥沙流失
Subject Area土壤学
DOI10.13870/j.cnki.stbcvb.2017.04.004
Indexed ByCSCD
Publication Place陕西省杨凌区西农路26号
Language中文
CSCD IDCSCD:6057157
Publisher水土保持学报
Funding Organization国家自然科学基金项目(41571224,41571130082) ; 国家自然科学基金项目(41571224,41571130082)
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8106
Collection水保所知识产出(1956---)
Corresponding Author樊军
Affiliation1.中国科学院教育部水土保持与生态环境研究中心
2.中国科学院大学
3.西北农林科技大学资源环境学院
Recommended Citation
GB/T 7714
游微,樊军. 粗质地土壤坡度和前期含水量对土壤侵蚀的影响[J]. 水土保持学报,2017,31(4):18-24.
APA 游微,&樊军.(2017).粗质地土壤坡度和前期含水量对土壤侵蚀的影响.水土保持学报,31(4),18-24.
MLA 游微,et al."粗质地土壤坡度和前期含水量对土壤侵蚀的影响".水土保持学报 31.4(2017):18-24.
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