Coupling relationship between reclamation and social economics development in north Jiangsu coastal area

?????????????????????????????????????????????????????????????????????????????????????????????Environmental Kuznets Curve?EKC????????????????????????????????????????????????????????40????????????????????????????????????????????????????????40???????????????????????????????????????????????????????????????????????????????????????????????9.55????????????????????????????????????????????????????????????????U???????????????3?????????1980-2005??????????????????????2005-2014??????GDP??3.64×104???????????????2014-2018????????????????????3????????????????GDP?????4.11?/km2?17.08?/km2???60.77?/km2??????????????????????????????????????????????????????????????????????????????????;Tidal flat wetland is one of the most sensitive and fragile ecosystems in world, tidal reclamation plays an essential role for coastal countries or regions to expand land. In recent years, with rapid urbanization, areas has led a series environmental problems such as ecosystem degradation. Taking wetlands northern Jiangsu research area, based on Environmental Curve (EKC) model, this study attempted characterize process socio-economic development, reveal phase over past 40 explain coupling relationship between social economic development. The results showed that expansion aquaculture water been main characteristics flats years. Compared Yancheng City, where bodies are clustered developing, Nantong which represented by Qidong, experienced relatively complete bodies. An exponential was observed area regional fishery output value is, when per capita reached approximately 95,500 Yuan, increase no longer depended increasing through reclamation. There typical inverted U curve development north can be divided into three phases. early (1980-2005), increased sharply growth. middle (2005-2014), trends growth continued, turning point appeared, GDP about 3.64×104 maximum appeared speed up 146.34 km2/a. late (2014-2018), downward trend while economy still increasing. stages, from 4.11 Yuan/km2 17.08 60.77 Yuan/km2, showing significant growing trend. Economic agricultural rural reforms, national local policies make important impacts strictly protection would great significance effectively control protect ecological environment.