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一、前言合理拟定长江干流下游各站防洪设计水位是做好下游防洪规划的前提条件,沿江的港口、城镇、桥梁、涵闸和堤防建设都需要防洪设计水位,它是确定各项工程防洪设计标准和工程规模的依据,因此做好这一工作是十分必要的。下游各站防洪设计水位的拟定与中游防洪设计水位是密切相关的,中游各站防洪设计水位经过1972年、1980年两次防洪规划座谈会已经协商确定,因此下游防洪设计水位的拟定目前已具备条件,根据下游各省市的需要我们开展了下游防洪设计水位的探讨工作。
Preface The reasonable design of the flood control design water level of all stations in the lower reaches of the mainstream of the Yangtze River is a prerequisite for good flood control planning in downstream areas. Flood control design levels are required for the construction of ports, towns, bridges, culverts and embankments along the river. And the basis for the size of the project, so it is very necessary to do this work. The design of downstream flood control design level is closely related to the flood control design water level in the middle reaches. The mid-course flood control design water level has been negotiated after two flood control planning symposiums in 1972 and 1980, so the design of downstream flood control design water level is now available Conditions, according to the needs of downstream provinces and cities we conducted a flood control design of downstream water level work.