[1]蔡雄飞,雷丽,王济,等.前期含水量对喀斯特山地石灰土坡面产流产沙的影响[J].水土保持研究,2019,26(01):29-33.
 CAI Xiongfei,LEI Li,WANG Ji,et al.Effect of Antecedent Soil Water Content on Runoff and Sediment in Limestone Soil of Slopes in Karst Mountain Area[J].,2019,26(01):29-33.
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前期含水量对喀斯特山地石灰土坡面产流产沙的影响()
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《水土保持研究》[ISSN:1005-3409/CN:61-1272/P]

卷:
26卷
期数:
2019年01期
页码:
29-33
栏目:
出版日期:
2019-02-28

文章信息/Info

Title:
Effect of Antecedent Soil Water Content on Runoff and Sediment in Limestone Soil of Slopes in Karst Mountain Area
作者:
蔡雄飞 雷丽 王济 段志斌 胡国锋
贵州师范大学 地理与环境科学学院, 贵阳 550001
Author(s):
CAI Xiongfei LEI Li WANG Ji DUAN Zhibin HU Guofeng
School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang 550001, China
关键词:
前期含水量喀斯特石灰土产流产沙
Keywords:
antecedent soil water contentkarstlimestone soilrunoff and sediment yields
分类号:
S157.2
摘要:
为了探讨前期含水量对喀斯特山区坡耕地坡面产流产沙过程及机制的影响,以该区域广泛分布的石灰土为研究对象,通过人工模拟降雨的试验方法,系统研究了干态、稍湿态和湿态石灰土坡面产流产沙过程。结果表明:(1)坡面初始产流时间随土壤前期含水量的增加而减少,初始产流时间与土壤前期含水量呈线性负相关关系。(2)在0~25 min期间,径流量呈逐渐增大的趋势,变化率呈现稍湿态 > 干态 > 湿态。25 min之后,径流量逐渐趋于稳定,随土壤前期含水量与坡度的增大,径流量增大。(3)稍湿态土壤坡面径流含沙量变化较小,基本趋于稳定;干态土壤坡面径流含沙量变化较大,呈开始增大,在第20分钟之后减小并趋于稳定;湿态土壤坡面径流含沙量变化最大,总体呈陡降、缓增,最后逐渐减小并趋于稳定的趋势。(4)径流平均含沙量与土壤前期含水量的关系呈近似抛物线变化,径流平均含沙量湿态 > 干态 > 稍湿态。
Abstract:
To study the effect of antecedent soil water content on the processes and mechanism of runoff and sediment on sloping farmland in karst mountain area, the wet, slightly wet and dry limestone soils which wide distributed in Karst mountain area were selected, the processes and characteristics of runoff and sediment yields in limestone soil slopes under different antecedent soil moisture levers were systematically tested by rainfall simulation experiment. The results showed that:(1) the initial-yielding times of runoff on slopes decreased with increase of antecedent soil water contents under different slopes, and there was the negative linear relation between the initial-yielding time of runoff and the antecedent soil water content; (2) the runoff tended to increase within 0~25 min, the rates of change decreased in the order:slightly wet soil > dry soil > wet soil, and then gradually stabilized and the rates of runoff increased with increase of antecedent soil water contents and slopes; (3) the sediment concentration in slope with the slightly wet soil changed little, it had great variation in slope with the dried soil, it increased until 20 min and then decreased slowly and tended to be stable; the sediment concentration in slope with the wet soil had most variation, and which sharply declined, slowly increased and finally gradually decreased and tended to be stable as the whole; (4) there was approximate parabola-shape variation between average sediment concentration and the antecedent soil water content, average sediment concentrations decreased in the sequence:wetted soil > dried soil > slightly wetted soil.

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备注/Memo

备注/Memo:
收稿日期:2017-11-30;改回日期:2018-3-8。
基金项目:贵州科技厅联合基金"不同坡度下喀斯特山区土壤径流可蚀性研究"(黔科合J字LKS[2012]27号)
作者简介:蔡雄飞(1982-),男,贵州盘县人,博士,副教授,研究方向:土壤侵蚀与水土保持。E-mail:624420800@qq.com
通讯作者:雷丽(1982-),女,贵州大方县人,硕士,讲师,研究方向:喀斯特环境。E-mail:19568797@qq.com
更新日期/Last Update: 1900-01-01