| 引用本文: | 马宏秀,孙权,鲁海涛,等.风沙土地下渗灌水分运移特性研究[J].灌溉排水学报,0,():-. |
| MA Hongxiu,SUN Quan,LU Haitao,et al.风沙土地下渗灌水分运移特性研究[J].灌溉排水学报,0,():-. |
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| 风沙土地下渗灌水分运移特性研究 |
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马宏秀1, 孙权1, 鲁海涛1, 马文礼2, 蒋鹏1, 张晓娟1, 蔡崭红2, 贾登成3
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1.宁夏大学农学院;2.宁夏农垦农林牧技术推广服务中心;3.宁夏农垦国营简泉农场
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| 摘要: |
| 为掌握风沙土埋设新型地下渗灌系统后土体水分运移规律,明确地下渗灌管适宜的埋设间距和埋土深度,运用室外土箱模拟试验,监测了不同初始含水率(5.1%,11.5%,16.8%)湿润体承压后土壤水分入渗趋势和再分布规律,并运用数学模型对入渗过程进行了拟合。结果表明：地下渗灌下湿润体形状近似以渗灌管为中心的椭圆状,同一时段初始含水率越大,湿润锋运移速率越快,累计入渗量和入渗速率越小,累积入渗量和入渗时间呈幂函数关系,而入渗指数则随着初始含水率的增大而增大；四种模型中Horton模型更适用于描述地下渗灌风沙土的水分入渗过程；初始含水率为5.1%、11.5%、16.8%条件下,渗灌管适宜埋深应分别小于10 cm、20 cm和30 cm,管间距应分别小于30 cm、60 cm和90 cm,即风沙土湿度越大,渗灌管埋深越深,管间距可相应增大。 |
| 关键词: 风沙土;地下渗灌;入渗特性;初始含水率 |
| DOI： |
| 分类号:S275 |
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| Study on water transport characteristics of infiltration and irrigation under aeolian sandy soil |
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MA Hongxiu1, SUN Quan1, LU Haitao1, MA Wenli2, JIANG Peng1, ZHANG Xiaojuan1, CAI Zhanhong2, JIA Dengcheng3
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1.Agricultural College of Ningxia University,Yinchuan;2.Agriculture,Forestry and animal husbandry technology Extension Service Center,Ningxia Agricultural Reclamation Group;3.State-owned Jianquan farm,Ningxia Agricultural Reclamation Group
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| Abstract: |
| In order to grasp the water transport law of soil after the new underground infiltration irrigation system was buried in aeolian sand, and to clarify the suitable burial spacing and buried depth of underground infiltration and irrigation pipes, the soil water infiltration trend and redistribution law of different initial moisture content (5.1%, 11.5%, 16.8%) and wet body under pressure were monitored by outdoor soil tank simulation test, and the infiltration process was fitted by mathematical model. The results show that the shape of the wetted body under underground infiltration is approximately elliptical centered on the perfusion pipe, and the greater the initial moisture content in the same period, the faster the wetting front migration rate, the smaller the cumulative infiltration amount and infiltration rate, the cumulative infiltration amount and infiltration time are power function, and the infiltration index increases with the increase of the initial moisture content; Among the four models, the Horton model is more suitable for describing the water infiltration process of underground infiltration and irrigation aeolian sand; Under the condition that the initial moisture content is 5.1%, 11.5% and 16.8%, the suitable burial depth of the permeation pipe should be less than 10 cm, 20 cm and 30 cm, and the pipe spacing should be less than 30 cm, 60 cm and 90 cm, respectively, that is, the greater the humidity of aeolian sand, the deeper the burial depth of the permeation pipe, and the pipe spacing can be increased accordingly. |
| Key words: Aeolian sand; underground infiltration; infiltration characteristics; initial moisture content |
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