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BeiLun River is a natural boundary, because this kind of special reasons, it is sensitive to the research, design and research.This paper starts from the natural geographical situation, BeiLun eastry introduces the temperature, precipitation, wind speed, severe weather and other natural conditions, a deep research of the estuary landforms. While collecting the estuary in the 1960s, 1990 and 2000, and the corresponding terrain physiognomic maps show its color is represented in different areas of geomorphology, through the comparison of several pictures, analyzes the trend BeiLun eastry evolution. On this basis, combining the recent investigation of environmental quality estuary, including water environment, the present situation, the Marine biological sediments, the environmental quality of mangrove investigation data, the paper analyses the present situation and BeiLun eastry nature environment conditions of water. Mainly seafloor topography, estuary special terrain, the sediment transport and water power relations. Underwater topography make water circulation, transverse lateral circulation of water erosion along the north shore there in south west of sediment accumulation, BeiLun eastry accelerated erosion of north, BeiLun eastry special terrain can be from the east wind - south west the - 180°, make BeiLun eastry role in any of the north sea to river estuary caused by erosion of transport of north.Although the main factors that affect estuary evolution is the natural factors, but human factors are also cannot ignore. Main human factors are seawall disrepair greatly reduces the prevention of Marine natural disasters erosion; Vietnam to the river side main channle accelerated sandbar reclamation north (our side) : Coast revetment of the vegetation in the role of coastal erosion and reduce sediment transporting underwater changes, Some of BeiLun River eastry artificial sand-excavating engineering environment, etc.To maintain our last BeiLun eastry Marine territorial rights and ensure land resources, the sustainable development of environment, puts forward the following countermeasures: comprehensive environmental rights to maintain positive territory as the core, comprehensive governance, Formulate and implement comprehensive environment and development of estuarine planning, Vigorously promote biological engineering, protection and development of mangrove resources, Accelerate revetments, maintenance and construction of river levees along the stability.
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