| Drain engineering programming is divided into two parts,rainwater project and sewage works,which occupies an important position in city infrastructure.Based on sufficient investigation of drainage system and problems in current situations, according to "Xuancheng City General Planning (2007-2020)",the principles and concrete measures of drainage engineering are further refined and optimized. In accordance with the principle of combining short and long term,different programs are analyzed and compared,urban rainwater will be used to effectively solve the shortage of water resources and water environmental degradation,which will be one of the optimization ways.We tried to be technically feasible in planning, economically rational,persist in urban development and ecological environment of synchronized planning,implementation and simultaneous development of policy, and realize economic,social and environmental benefits unification. |