乾隆帝曾在4年间(1768—1771年)派人考察了承德境内的滦河、热河,根据考察结果写下《热河考》、《滦河濡水源考证》,并命人开挖承德市中心旱河,以《开新河记》记录兴修原因、经过和效果。这三篇河记是记录承德地区水生态环境的重要文献。滦河、热河、新河(人工河)水系,曾在皇家园林建设、塞外政治中心形成、城市发展中发挥重要作用。深入研究历史水系发展状况,有助于优化世界文化遗产地生态环境、推动承德文物事业与旅游文化产业、现代农业产业开发。 During the four years (1768-1771), Emperor Qianlong dispatched officers to inspect the Luanhe River and the Jehol River in Chengde, and wrote the “Rehekao” and “Luanhe Ruyuan Source Textual Research” according to the inspection results, and ordered the excavation of Chengde Downtown dry river, “open a new river in mind,” recorded the reasons for the rise, after and effect. These three rivers are recorded in Chengde area aquatic environment important literature. Luanhe River, Rehe, New River (artificial river) water system, has played an important role in the imperial garden construction, the formation of extra-serous political center and urban development. Studying the development of historical water systems in depth will help to optimize the ecological environment of the World Cultural Heritage sites and promote the development of Chengde’s cultural relics, tourism and cultural industries and modern agricultural industries.