4Lanrent Pfister, Jaap Kwadijk, Andr6 Musy, et al. Climate change, land use change and runoff prediction in the Rhine - Meuse basins [ J ]. Riv- er Research and Applications, 2004, 20 (3) : 229 -241.
5Ren Liliang, Wang Meirong, Li Chunhong, et al. hnpacts of human activity on river runoff in the northern area of China [ J ~. Journal of Hydrolo- gy, 2002, 261 (1 -4):204-217.
6Li Lijuan, Zhang Lu, Wang Hao, et al. Assessing the impact of climate variability and human activities on streamflow from the Wuding River ba- sin in China[J]. Hydrological Processes, 2007, 21:3485 -3491.
7Yang Dawen, Li Chong, Hu Heping, et al. Analysis of water resources vari',&ility in the Yellow River of China during the last half century using historical data[ J ]. Water Resources Research, 2004, 40, W06502 ( 1 - 12).
8Yu Pengtao, Valentina Krysanova Wang Yanhui, et al. Quantitative estimate of water yield reduction caused by forestation in a water- limited area in northwest China[ J]. Geophysical Research Letters, 2009, 36:1 - 5.
9Wang Yanhui, Yu Pengtao, Xiong Wei, et al. Water yield reduction after Afforestation and related processes in the semiarid Liupan Mountains, Northwest China[ J]. Journal of the American Water Resources Association, 2008, 44(5) : 1086 - 1097.
