1. Bi EP, Gao Y, Liu CL (2000) Groundwater quality and its trend in Shijiazhuang City under the impacts of human activities (in Chinese). Hydrogeol Eng Geol 4:40–43
2. Chen JY (2003) Study on nitrate pollution in groundwater in the North China Plain from the viewpoint of groundwater flow system and land-use change based on chemistry and isotopes. PhD Thesis, Chiba University, Japan
3. Chen JY, Wu K (1997) Preliminary analyses for crop water consumption by using Lysimeter. J Chin Geogr 7(3):64–71
4. Chen JY, Tang CY, Sakura Y, Kondoh A, Shen YJ, Ouyang Z (2001) The impacts of diversion from the Yellow River on the local aquifer –case study in Shandong Province, China. In: Seiler KP, Wohnlich S (eds) New Approach Characterizing Groundwater Flow. A.A. Balkema Publishers, Lisse, pp 1143–1147
5. Chen JY, Tang CY, Sakura Y, Kondoh A, Shen YJ (2002) Groundwater flow and geochemistry in the lower reaches of the Yellow River: a case study in Shandong Province, China. Hydrogeol J 10:587–599