Open AccessCharacteristics test of single point source wetting body of surge and spring root irrigation
Author(s) -
Shenglan Ye,
Tiancheng Liu
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1549/3/032016
Subject(s) - wetting , water content , drip irrigation , environmental science , water flow , spring (device) , hydrology (agriculture) , soil water , geotechnical engineering , soil science , irrigation , geology , materials science , composite material , engineering , agronomy , mechanical engineering , biology
In order to further explore the change rule of soil wetting characteristics in surge and spring root irrigation, the single-point source flooding test of jujube micro-irrigation demonstration base in northern mountainous area was studied. Under different flow conditions, Soil wetting front migration distance and water distribution of the law, the results show that: wetting wet front movement quickly, with the passage of time and gradually slow down. The wetting radius of the horizontal flow increases with the increase of the drip flow. In the process of water redistribution, the wetting peak velocity of the small droplet shows a “failure” phenomenon, and the wet front migration rate larger drip flow significantly slows down. The general trend of soil moisture content of the single-point source moisturizing source is: the farther away from the straight line of the drip, the lower the water content of the soil; at the end of the irrigation, the soil water content decreases along the depth direction. As time goes on, the areas with high water content gradually migrate down from the surface layer, and finally the soil moisture distribution characteristics of low surface layer, high middle layer and low bottom layer are formed.