水动力学研究与进展B辑
水動力學研究與進展B輯
수동역학연구여진전B집
JOURNAL OF HYDRODYNAMICS
2013年
6期
867-870
,共4页
黄辉%钱家忠%匡星星%陈冰宇%马雷%吴亚楠
黃輝%錢傢忠%劻星星%陳冰宇%馬雷%吳亞楠
황휘%전가충%광성성%진빙우%마뢰%오아남
low-permeability soil%water content%water pressure%capillary pressure%vadose zone%pumping test
The pumping test in an unconfined aquifer with and without a low-permeability soil was studied experimentally to reveal the influence of the negative air pressure (NP) caused by the upper layer on the water content(w), the water pressure(Pw), as well as on the capillary pressure(Pc). The study demonstrates that the NP generated in the vadose zone during pumping in the capper aquifer has a significant influence onw,wP andPc. ThecP obtained from the capped aquifer is smaller than that without the upper layer. After the NP reaches a peak, the influence of the NP onPc is gradually declined as the air inflows through the upper layer which makes the NP gradually return to zero. When the air pressure returns to the atmospheric pressure,Pc in the vadose zone is only correlated withPw, the same as the case with no upper layer.
