Study on Water Conservation Function of Main Forest Types in Jiangning Small Watershed

Studies on the canopy precipitation interception,litter layer water-holding capacity,soil infiltration characteristic and water holding capacity of main forests types in Jiangning small watershed.The results show that: the order of the stem-flow rates in earch forest was Bamboo forest(7.89%)Quercus forest(5.13%)Chinese fir forest(3.28%)Masson pine forests(1.85%);the order of the canopy interception rates in earch forest was Quercus forest(31.2%)Bamboo forest(24.17%)Chinese fir forest(20.57%) Masson pine forest(16.2%);the order of litter layers's maximum water-holding capacity and modified interception in earch forest was both for Quercus forestBamboo forestChinese fir forestMasson pine forest;the order of soil non-capillary porosity and general porosity in earth forest was both for Masson pine forestsChinese fir forestBamboo forestQuercus forest;the order of soil infiltration characteristic in earth forest was Masson pine forestsChinese fir forestQuercus forestBamboo forest.Using the methord of Topsis to compare the comprehensive water conservation function of different forest,the result show that:Quercus forest was the best,the second was Bamboo forest,the third was Chinese fir forest,the Masson pine forest was the worst.