干旱区生态环境知识资源中心(Arid): 喀斯特区石漠化坡耕地产流产沙模拟试验

Arid

	喀斯特区石漠化坡耕地产流产沙模拟试验
其他题名	Simulation experiment on runoff and sediment yield in sloping farmland in the rocky desertification of karst region
	王玉红; 高儒学; 戴全厚; 甘艺贤; 姚一文
来源期刊	中国水土保持科学
ISSN	2096-2673
出版年	2021
卷号	19 期号:4 页码:78-86
中文摘要	为进一步了解掌握喀斯特区石漠化坡耕地土壤侵蚀规律,采用人工模拟降雨的方法,研究不同降雨强度及地下孔(裂)隙度下的坡耕产流产沙特征。结果表明:小降雨强度(30 mm/h)时,喀斯特区石漠化坡耕地无坡面产流、产沙,主要以地下漏失为主;降雨强度对坡耕地地表产流、产沙影响呈极显著正相关;地下孔(裂)隙度对坡耕地地下产流、产沙影响呈显著正相关;地表产流情况下,地下产流所占比例在35.87% ~ 80.32%之间;地下产沙所占比例在18.47% ~ 72.08%之间,所占比例均较大。产流量随降雨时长的变化趋势整体表现为先增加后趋于稳定,而产沙量则因降雨强度与地下孔(裂)隙度不同而异。研究结果补充完善了喀斯特区石漠化坡耕地土壤侵蚀机理,可为喀斯特石漠化治理和生态修复提供理论参考依据。
英文摘要	[Background] Sloping farmland is the main type of cultivated landand and also the main source of soil erosion in the karst mountain area of southwest China. Previous studies have not yet fully revealed the law of soil erosion in the karst sloping farmland,especially the influence of rainfall intensity and underground pore fissure degree on the runoff and sediment yield of sloping farmland. The proportion of surface and underground soil erosion of the total erosion in the karst sloping farmland is not clear. [Methods] In this paper,limestone soil,a representative soil in karst regin,was selected as the research soil sample,and the runoff and sediment yield characteristics of slope farmland under different rainfall intensity and underground pore fissure degree were studied by artificial rainfall simulation method. The double-layer structure of rocky desertification slope farmland in the field was simulated by drilling steel trough on the floor,and the soil was filled in three layers. One rainfall lasted for 30 min,and samples were collected and replaced every 3 minutes. The runoff was measured by measuring cylinder and sediment yield was measured by drying method. The experimental data processing was mainly completed by Excel 2013,and the mapping was completed by Origin 9.1. [Results]During the light rainfall intensity (30 mm/h),there was no runoff and sediment generated in the rocky desertification sloping farmland in karst area,mainly underground leakage. The influence of rainfall intensity on the surface runoff and sediment yield of sloping farmland was significantly positive,and the influence of underground pore fissure degree on runoff and sediment yield was significantly positive. In the case of surface runoff,the proportion of underground runoff was 35.87%-80.32%,and the proportion of underground sediment was 18.47%-72.08%. The variation trend of runoff with the rainfall duration was as follows: the overall performance increased first and then tended to stabilize of runoff yield,while the sediment yield varied with rainfall intensity and underground pore fissure degree. [Conclusions] Rainfall intensity is the main factor affecting soil and water loss of slopes in the rocky desertification area. More attention for soil erosion control should be paid to underground leakage for the slope in the rocky desertification area. Hence it can be considered to reduce soil erosion by maintaining or increasing vegetation cover on those slopes. The results may provide a theoretical reference for karst rocky desertification control and ecological restoration.
中文关键词	产流 ; 产沙 ; 降雨强度 ; 地下孔(裂)隙度 ; 喀斯特坡耕地
英文关键词	runoff sediment yield rainfall intensity underground pore fissure degree sloping farmland in karst region
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7043174
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378132
作者单位	王玉红, 贵州大学林学院, 贵阳, 贵州 550025, 中国.; 高儒学, 贵州大学林学院, 贵阳, 贵州 550025, 中国.; 戴全厚, 贵州大学林学院, 贵阳, 贵州 550025, 中国.; 甘艺贤, 贵州大学林学院, 贵阳, 贵州 550025, 中国.; 姚一文, 贵州大学林学院, 贵阳, 贵州 550025, 中国.
推荐引用方式 GB/T 7714	王玉红,高儒学,戴全厚,等. 喀斯特区石漠化坡耕地产流产沙模拟试验[J],2021,19(4):78-86.
APA	王玉红,高儒学,戴全厚,甘艺贤,&姚一文.(2021).喀斯特区石漠化坡耕地产流产沙模拟试验.中国水土保持科学,19(4),78-86.
MLA	王玉红,et al."喀斯特区石漠化坡耕地产流产沙模拟试验".中国水土保持科学 19.4(2021):78-86.