通过对江苏省情、水域现状及20世纪50年代以来水域变化的调查分析，评价了现状水域状况，指明了研究适宜水面率的重要意义。以现状水面率调查评价为基础，借鉴国内外适宜水面率相关研究成果，对适宜水面率作了界定。根据江苏省情，提出了一种新的水面率研究方法——类比法，采用该方法对江苏各地级行政区和全省总体适宜水面率进行了详细研究，提出了相应成果，并进行了合理性分析。研究方法及思路对类似地区和大尺度地域适宜水面率研究提供了经验和借鉴。

Through investigation on water area and changes of water area since the 1950s in Jiangsu province, we evaluated the current situation of water area, and expounded the importance of researches on suitable water surface ratio. Based on research achievements of suitable water surface ratio at home and abroad, we put forward a new approach, analogy, to research the suitable water surface ratio in Jiangsu and its prefecture-level districts. Results show that suitable water surface ratio is around 17.30% and is proved to be reasonable. This approach provides reference for the research on suitable water surface ratio in similar regions or larger regions.