A Multi-Grade Fuzzy Pattern Recognition Model on Assessment of Wetland Hydrological Functions Impacts of Ice-snow Storm on Litter Storage and Hydrological Function of Broad-leaved Forest in Jiufeng Mountains, North Guangdong Province Ecohydrological functions of litter in man-made Acacia Mangium and Pinus elliotii plantations Study on Eco-hydrolog ica l Function of Forest-litter and So il in the SouthSide of L iupan Mounta ins, Ningx ia Hui Autonomous Region, China Ecohydrological Functions of a Human-disturbed Pinus massoniana Forest in Dinghushan Biosphere Reserve Application of Physically based Distributed Models in Forest Hydrology STUDIES ON REGULATING FUNCTION OF FOREST HYDROLOGY AND MICROCLIMATE IN ARID AND SEMI-ARID AREA OF WEST CHINA