1989-2019年环渤海地区养殖池的空间变化特征

Spatial variation of aquaculture ponds in the Bohai Rim region during 1989-2019

养殖池是海水养殖业的重要表现形式,研究环渤海地区养殖池的时空变化对判断该区域海水养殖的发展历程具有重要意义。本研究基于1989-2019年共44景Landsat影像,利用目视解译的方法获取养殖池的矢量分布数据,在此基础上利用平均中心及标准差椭圆等方法对环渤海地区近30年来养殖池的空间变化特征进行分析。研究结果表明:1989-2019年,(1)养殖池面积呈现逐年增长的趋势,共增加450.15 km2;(2)养殖池平均中心从渤海湾附近逐渐沿莱州湾至辽东湾一线向东北方向偏移;(3)养殖池分布的向心性越来越明显,其分布区域逐渐由陆向海推进;(4)养殖池空间变化明显的区域主要集中在莱州湾、渤海湾以及辽东湾。

Aquaculture pond is an important form of mariculture.Studying the temporal and spatial changes of aquaculture ponds in the Bohai Sea region is of significant reference for evaluating the development of mariculture in the region.Based on a total of 44 Landsat images from 1989 to 2019,the vector distribution data of aquaculture ponds were obtained by visual interpretation.On this basis,the spatial variation characteristics of aquaculture ponds in the Bohai Sea region in the past 30 years were analyzed by average center analysis and standard deviation ellipse.The results show that:(1)from 1989 to 2019,the area of aquaculture pond showed a trend of increasing year by year,with a total increase of 450.15 km2.(2)The average center of the pond gradually shifts from the vicinity of Bohai Bay to the northeast along the line from Laizhou Bay to Liaodong Bay.(3)The centripetal distribution of the culture ponds is becoming more and more obvious,and its distribution area gradually moves from land to sea.(4)Obvious spatial variation were mainly in Laizhou Bay,Bohai Bay and Liaoning Bay.