Application of Groundwater Model to Groundwater Regulation in Cangzhou Area Juyan Zhu, Yunlong Wang, Haipeng Guo, Xisheng Zang and Tongchun Qin E3S Web Conf., 79 (2019) 03014 Published online: 15 January 2019 DOI: 10.1051/e3sconf/20197903014