CHEN San-xiong1,3,CHEN Jia-dong1,XIE Li2,LIAO Jian-wen3,ZHANG Jin-chi1,YANG Qun-liang3(1.Nanjing Forestry University,Nanjing 210037,2.Pearl River Water Resources Commission,Ministry of Water Resources,Guangzhou 510061,3.China Pearl River Water Resources Planning Designing & Surveying Co.,LTD,Guangzhou 510610)
