摘要:
利用1971年和1981年2版次地形图数据以及1981年、1990年、2001年和2011年4期遥感影像数据对近40 a来椒江一台州湾的滩涂围垦土地利用变化进行了调查.依据上述资料,利用GIS空间分析功能,获得了5期滩涂围垦土地利用现状及各期次之间的滩涂围垦土地利用变化转移矩阵.调查结果表明,近40 a来,椒江一台州湾滩涂围垦总体上呈增加趋势,土地利用变化的类型逐渐增多.1971-1990年间滩涂围垦土地利用类型多为耕地、养殖场和围垦用地;1990年以后,滩涂处于围垦开发利用热潮,光滩及围垦用地等多向耕地、居住用地、港口码头及养殖场等类型转化,而原本耕地及养殖场用地则多转化为居住用地.2001-2011年间,有80.77%的滩涂转化为围垦用地,光滩面积减少程度大,椒江一台州湾滩涂围垦扩张速度达到各时期最大值.
Abstract:
In this paper,not only the topographic maps of 1971 and 1981 but also the remote sensing images of 1981,1990,2001 and 2011 were used for investigating the land use change of reclaimed mud flats of Jiaojiang-Taizhou Estuary in the past 40 years or so.Based on the topographic maps and satellite images and supported by the GIS spatial analysis functions,the authors acquired the current land use status of five periods and the land use change matrix between each period of reclaimed mud fiats.The remote sensing survey results showed that in the past 40 years or so the trend of reclaimed mud flats of Jiaojiang-Taizhou Estuary was totally exacerbated and the types of land use were gradually increased.From 1971 to 1990,the land use types of reclamation zone mostly were converted into cultivated fields,breeding farms and reclamation land.After 1990,the upsurge of developing the reclamation of mud flats appeared.The beach and the reclamation land were converted into other land use patterns,such as cultivated fields,residential land,port land,and breeding farms.From 2001 to 2011,80.77% of the beach was converted into the reclamation land.The area of beach was reduced heavily.The expanding speed of reclamation of mud flats achieved the maximum in this period.
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