The physical characteristics of soil water and their drought resistance in Hongge immigration’s reclamation area of Ertan
hydropower station were studied. The results showed that in comparison with the paddy soil and vegetable soil with higher fertility in nearby regions, the soil water percolation is high because the layer distribution of soil profile was disturbed, and the plow pan with preservation of soil water was not found in the soil profile. Maximum hygroscopicity, wilting coefficient, field capacity and available water content were positively related with content of <0.01 mm physical clay. The
water retention capacity of soil was depended on content of <0.01 mm physical clay. The soils with higher contents of organic matter and good structure could coordinate contradictory of water retention capacity and water release capacity of soil. The water
evaporation and drought resistance of various soils was covered by potential evaporation of climate in the district. The research and application of soil irrigation technology would play a role in development of agriculture in the district.