This paper took Hubei and Hunan plain area(hereinafter referred to as"Two Lakes")as an ex-ample,using 0.30 m high-resolution remote sensing images and the survey data of sampling village farmers to con-firm the utilization status of homestead and the efficiency of living homestead.Then,according to the 3S technology and the method of per household construction land standard, this paper evaluated the homestead release potential under different utilization status and explored its influencing factors.The findings show that:①19.64%of the rural residential is vacant and abandoned,and the using rural residential use less efficient,the efficiency as 73.17%;②The Two Lakes plain can release 44.39 m2area of per capita,and the total release potential of Two Lakes plain is 103 746.53 hm2;③The release potential is significant correlation with the rate of rural non-agriculture labor,the difference in economic development level,the resource endowment of cultivated land and historical reasons.%以两湖(湖北、湖南)的平原区为例,采用0.30 m高分遥感影像和抽样村农户宅基地利用情况调查数据,确定宅基地利用现状并估计使用中宅基地利用效率;利用3S技术和户均建设用地法测算不同利用状态的宅基地退出潜力并分析其影响因素.结果表明:① 两湖平原区宅基地空置废弃占比19.64%,使用中宅基地利用效率为73.17%.②两湖平原区人均可退出面积为44.39 m2,进而推算出可退出潜力为103746.53 hm2.③ 退出潜力大小与农村劳动力非农化、地区经济水平差异、村庄耕地资源禀赋以及历史原因有关.
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