7Hibbs B J. Groundwater and surface water salinization in the E1 Paso/Juarez Region [ Z ]. SAHRA Strategic Plan, Basin Scale Water Balance ( Project ID : B11 ), 2005.
8Ibe K M, Agbamu Pat U. Impacts of human activities on groundwater quality of an alluvial aquifer: a case study of the Warri River, Delta State, SW, Nigeria[ J]. International Journal of Environmental Health Research, 1999,9 ( 4 ) : 329 - 334.
9Yang Dawen, Li Chong, Hu Heping. et al. Analysis of water resources variability in the Yellow River of China during the last half century using historical data [ J ]. Water Resour. Res., 2004, 41}(6),W06502.