| Cite this article: | 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,():-. |
|
| |
|
|
| This article has been：Browse 805Times Download 0Times |
|
|
|
| DOI： |
|
| Study on water transport characteristics of infiltration and irrigation under aeolian sandy soil |
|
MA Hongxiu1, SUN Quan1, LU Haitao1, MA Wenli2, JIANG Peng1, ZHANG Xiaojuan1, CAI Zhanhong2, JIA Dengcheng3
|
|
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
|
| 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 |
|
|
|
|
|
|
