Research on Ecological Benefit to Polar Forest for Soil and Water Conservation in the Vergin Exploit Region of Iii River Basin

The seep rate of soil water,soil water content,soil temperture,soil evaporation,leaf transpiration were determined.The results showed that the order of the seep rate of soil water was 2 m×4 m1.5 m×2 mCK after water was added for 0~4 hours and the varying range of soil water content of 2 m×4 m forest was greatest(+2.09%),whose increased value were 1.47 and 4.18 times more than CK and 1.5 m×2 m forest.The highest temperature of soil in 2 m×4 m forest appeared at 16:00,and higher temperature of soil in 1.5 m×2 m forest appeared during 14:00-18:00.Soil evaporation of 2 m×4 m forest was larger than that of 1.5 m×2 m forest in all day.The total forest evaporation of 2 m×4 m forest [2.47 g/(dm2·d)]was higher than that of 1.5 m×2 m [0.91 g/(dm2·d)].The total leaf transpiration of 1.5 m×2 m forest [111.47 g/(dm2·d)] was higher than that of 2 m×4 m forest [87.81 g/(dm2·d)]in all day.