The water environment of the ancient Liaocheng consisted of the Grand Canal and lakes around the city.The construction of water environment had a decisive impact on the existence,development and prosperity and decline of the city.At the beginning of the Ming dynasty,the defensive system was built by the masonry walls and Guangyue Tower,and at the same time urban drainage was discharged from the center of the city to Huancheng Lake.During the Ming and Qing Dynasties,the hydraulic facilities in the Liaocheng section of the Grand Canal continued to increase or decrease,and management officials also changed.Grain transportation and commerce resulted in thegrowing flourish of the ancient Liaocheng,and also influenced the city layout,especially the distribution of government buildings and business district,forming the unique waterside town.%河、湖环绕的水环境决定性地影响着古聊城的存在、发展与兴衰.明初砖石筑城在构筑防御体系的同时,形成中心向四周排入环城湖的排水组织方式.明清“保运”的国策促使聊城河道水工设施不断增减,通过涵闸、桥梁、码头组织漕船和物资的集散:管理职官亦有变更,合理的管理体制确保漕运畅通,川流不息的漕运行商使运河畔的古聊城日渐繁盛,并影响了古城衙署、商业建筑的分布和城市格局,形成河、湖、城环绕相依的独特“水城”格局.
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