Abstract: Natural calamities occur when variOus natural phenomna endanger life,minds and properties,but some potential environmental disasters such as rnan－made and anthropogenous natural disasters develop slowly and profoundly,whlch are unobvious and not readily understandable.Thixpaper deals with the impacts of potential envlronmental disasters on agricuIture,and based on the geographic differentiation and calami-tous characteristics in Liaoning province,sets a framework of calamity divisioning and provides a guidance for preventing calarnities in this province.

Key words: wave-elimination weir, riparian area, ecological restoration, stability of water quality, artificial lake bay, Taihu Lake.