浙江沿海地区景观格局及变化分析

Analysis of variation of landscape pattern in Zhejiang coastal area

基于浙江沿海地区1990、2000和2010年的土地分类数据,分析20年来浙江沿海地区的景观格局及变化情况。结果表明:浙江沿海地区各类景观面积比例很不均匀,各类景观面积大小排序为林地>耕地>建设用地>湿地>草地>未利用地;各类景观破碎化程度排序为未利用地>草地>建设用地>湿地>耕地>林地,且建设用地、草地和未利用地的破碎化程度在逐年加深;景观斑块边界曲折,形状不规则,景观斑块受人类活动的干扰强度逐渐加大;城镇用地急速扩张,主要挤占了耕地,其次是林地和湿地,部分草地和未利用地也变成了城镇用地;原有湿地遭到了不同程度的破坏,主要是由于城镇化和围海造田引起的;未利用地的利用情况较好,主要用来植树造林。

Landscape pattern and changes of coastal area in Zhejiang during the recent 20 years have been analyzed,based on the classification data of the coastal land in Zhejiang in 1999,2000 and 2010.The results show that the proportion of various types of landscape in coastal area in Zhejiang is rather uneven;the size sort of various types of landscape is woodland>cropland>construction land>wetlands>grassland> unused land;the fragmentation sort of various types of landscape is unused land>grassland>construction land>wetlands>cropland>woodland and the degree of fragmentation of grassland and unused land is in the deepening year;landscape patch is built with tortuous border and irregular shape,and the interference intensity of landscape patches gradually increased by the human activity;in the rapid expansion of urban land,the farmland is mainly occupied,followed by woodlands and wetlands,and some kind of grassland and unused land portion has become urban land either;original wetlands have been damaged in varying degrees,mainly due to the urbanization and land reclamation;the utilization situation of unused land is better,mainly being used for afforestation.