The coastal wetlands of china ' s yellow sea , where the satellite - tracked godwits landed , are no exception : large areas of coastline continue to be reclaimed for agriculture , industry , urban expansion and other development ? an estimated c . 37 % of intertidal areas have been lost since 1950 国际鸟盟新闻里有这么一段话：卫星追踪斑尾塍鹬的停留地? ?中国黄海沿海湿地，也面临着巨大的威胁：大片海岸土地被持续开发成农田，工业用地和城市建设用地等等。
The study of " urban village " includes many parts , i . e . urban planning , sociology , economics and ecology . the most of existing research are focus on the population structure , economic structure , and the impact of urban expansion on agricultural land , urban planning and construction . the thesis is the supplement of the existing research , studying the living modality in " urban village " “城中村”问题首先暴露在我国沿海和南部开放城市，对“城中村”的研究涉及到城市规划、社会学、经济学、生态学等诸多领域，现有的研究成果主要从人口特性、经济发展、土地利用、规划建设等方面进行研究，本论文在已有研究成果基础上，主要研究“城中村”的居住形态，使对“城中村”的研究更加深入、系统。
This paper discuss the rural settlement spatial evolution impact factors in urbanization , and also point out that urban expansion , the labor mobility between urban and rural area , industry structure changes , infrastructure construction , people ' s concept changes are the major factors . according to the differences about the trends of rural settlement and feature of urban - rurual spatial evolutional , it is compartmentalized that the rural settlement spatial evolution into 3 types ( patterns ) , initiative , passivity , and nagative . simultaniously , the analysis for each type is put forward 城市化对乡村聚落空间演变的影响因素主要体现在城市用地扩张、城乡人口流动、产业结构变化、基础设施建设以及居民观念转变等方面，根据自身发展趋向与城乡空间演变特征的差异性，将乡村聚落空间演变的类型归纳为主动型、被动型和消极型，并对其发展演变特征分别进行总结分析。
