Phreatic Water Evaporation Test of Bare-sandy Land in Northwest of Liaoning Province

Based on the date obtained from the experiment station of phreatic water evaporation on sandy land in A'erxiang Town,which is from mid April to early October 2010,the influence factors and its variation rules of sandy phreatic water evaporation at condition of bare land is analyzed.The results show that the variation trend of phreatic water evaporation is in accord with water surface evaporation;the main factor which influences the whole process of phreatic water evaporation and infiltration recharge is rainfall;at the depth interval of 0.0 to 1.0 m,the effect of groundwater buried depth on phreatic water evaporation is great;the infiltration recharge reaches maximum when the groundwater buried depth is 1.5 m;the critical depth of phreatic water balance in unsaturated-saturated system on sandy land is between 0.5 and 1.0 m and the best buried depth of phreatic water is 1.5 m.