浙江乐清湾海岸带人为干扰度的分形研究

发布时间：2018-02-15 13:30

本文关键词： 乐清湾分形维数人为干扰度　出处：《科技通报》2017年07期 　论文类型：期刊论文

【摘要】：以浙江省乐清湾多期遥感影像数据作为数据源,借助GIS和RS技术,分别提取了1981、1991、2001和2013年4个时期的海岸线矢量数据,通过计算海岸线分形维数,确定海岸线人为干扰等级的分形维数区间范围,界定海岸线分形维数与人为干扰强度的关系,从而进行乐清湾海岸带人为干扰强度评价。结果如下:(1)由分维数计算结果可看出,从1981-2013年乐清湾沿海地区人类干扰强度不断增大,分维数值由1.0764下降到1.0523。(2)从干扰强度来看,1981-2013年乐清湾沿海由微干扰进入中度干扰阶段。(3)乐清湾海岸线逐渐向海湾内部推进,并且海岸线复杂程度降低,人类活动对乐清湾作用强度逐渐增大,成为影响乐清湾海岸线分维数变化的主要驱动因素之一。
[Abstract]:Taking the multi-period remote sensing image data of Yueqing Bay in Zhejiang Province as data source, the coastline vector data of four periods (1981 ~ 1991 ~ 2001 and 2013) were extracted by means of GIS and RS techniques, respectively, and the fractal dimension of coastline was calculated. The range of fractal dimension of artificial disturbance grade of shoreline is determined, and the relation between fractal dimension of shoreline and intensity of man-made interference is defined, so as to evaluate the intensity of anthropogenic interference in the coastal zone of Yueqing Bay. The results are as follows: 1) from the fractal dimension calculation, we can see, From 1981 to 2013, the intensity of human interference in the coastal area of Yueqing Bay increased, and the fractal dimension value decreased from 1.0764 to 1.0523.2) from 1981 to 2013, the coastal area of Yueqing Bay moved from micro-disturbance to moderate interference stage. Moreover, with the decrease of coastline complexity, the intensity of human action on Yueqing Bay increases gradually, which becomes one of the main driving factors affecting the fractal dimension of Yueqing Bay coastline.
【作者单位】：浙江师范大学地理与环境科学学院;
【基金】：国家自然基金项目(41071002,41371206)资助
【分类号】：P237;P737

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