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本文以稻田、油田、虾田和苇田（四个土地利用类型）开发存在着尖锐矛盾的特殊地块──辽宁省大洼县小三角洲为研究对象，以生态和经济综合发展为原则。应用地理信息系统（ＧＩＳ）和王个评价模型进行四田的适宜性评价，较深入地研究了四个土地利用类型在空间上的配置。结果表明，大洼小三角洲适于四田开发的地区是相当大的。稻田适宜区域占总面积２９．６５％，虾田２５．０４％，苇田４２．６６％，其中苇田面积较大，这主要反映了在评价时注重生态因素，使用区域的经济发展与环境保护相协调。
In this paper, paddy fields, oil fields, shrimp fields and reed fields (four types of land use) there is a sharp contradiction of the special block ─ ─ Dawa County in Liaoning Province as a research object, with ecological and economic development as the principle. Applying Geographic Information System (GIS) and Wang evaluation model to evaluate the suitability of four fields, the spatial allocation of four land use types is studied in depth. The results show that the area suitable for the development of Si Tian in Dawa Delta is quite large. The suitable area of paddy fields accounts for 29.65% of the total area, 25.04% of shrimp fields and 42.66% of reed fields, of which, the area of reed fields is larger, which mainly reflects the emphasis on ecological factors during the evaluation, the economic development and environment of the used areas Protection coordination.