| 引用本文: | 朱 磊,尤 今,陈玖泓.裂隙网络对坡面流及土壤水分入渗影响[J].灌溉排水学报,2017,36(12):. |
| ZHU Lei,YOU Jin,CHEN Jiuhong.裂隙网络对坡面流及土壤水分入渗影响[J].灌溉排水学报,2017,36(12):. |
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| 摘要: |
| 为研究裂隙对坡面流及土壤水分入渗的影响，通过染色示踪试验，对染色示踪图像进行二值化处理，提取出各像素点染色信息。对染色信息及试验数据处理得到径流量、土壤水分入渗量等参数，进而分析裂隙网络对入渗深度、染色面积、坡面流及土壤水分入渗的影响。结果表明，裂隙网络的存在减小了坡面径流系数，增大了降雨入渗系数；较无裂隙试验相比，50 mm/h雨强下裂隙试验平均径流系数减小了0.42，降雨入渗系数增大了0.53； 30 mm/h雨强裂隙试验平均径流系数减小了0.15，降雨入渗系数增大了0.38。裂隙网络的存在增大了剖面的入渗深度、染色面积；较无裂隙试验相比，50 mm/h雨强下裂隙试验平均入渗深度增大了21.34 cm，平均染色面积增大了36.0%；30 mm/h雨强下裂隙试验平均入渗深度增大了5.70 cm，平均染色面积增大了9.5%。 |
| 关键词: 裂隙网络； 坡面流； 土壤水分; 入渗 |
| DOI：10.13522/j.cnki.ggps.2017.12.016 |
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| The Influence of Fracture Network on Overland Flow and Water Infiltration in Soil |
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ZHU Lei, YOU Jin, CHEN Jiuhong
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School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China; Efficient Use of Water Resources in Arid Modern Agriculture Ministry of Educational Engineering Research Center, Yinchuan 750021, China
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| Abstract: |
| This paper studied the impact of fracture network on overland flow and water infiltration in soil using dye tracer. By digitizing the two-dimensional dye images, we calculated the parameters related to runoff volume, infiltration volume in the absence and presence of the soil fracture network respectively. The result indicated that compared with the non-fractured soil, the fracture network reduced surface runoff coefficient and increased rainfall infiltration coefficient; the average runoff coefficient with the fracture network reduced by 0.42 and the rainfall infiltration coefficient increased by 0.53 under rainfall intensity of 50 mm/h. The average runoff coefficient with the fracture network reduced by 0.15 and the average rainfall infiltration increased by 0.38 under the rainfall intensity of 30 mm/h. Meanwhile, the fracture network increased infiltration depth and the wetting areas, compared with those in the absence of fracture network. The average rainfall infiltration depth in the presence of the fracture network increased 21.34 cm and the average wetting area increased 36.0% under a rainfall intensity of 50 mm/h, and 5.70 cm and 9.5% under a rainfall intensity of 30 mm/h. |
| Key words: fracture network; overland flow; soil water content; water infiltration in soil |
