快速城市化地区海岸线分维动态演变研究——以深圳市为例  

Research on Dynamic Change of Fractal Dimensions of Temporal Series of Coastline in Rapid Urbanization Area: A Case Study of Shenzhen

作　　者：李猷[1,2] 王仰麟[1] 彭建[1] 刘珍环[1,2] 吴健生[2] 

机构地区：[1]北京大学城市与环境学院,北京100871 [2]北京大学深圳研究生院城市人居环境科学与技术重点实验室,广东深圳518055

出　　处：《热带地理》2009年第5期429-433,共5页Tropical Geography

基　　金：国家自然科学基金重点项目(40635028);国家自然科学基金青年项目(40801066);中国博士后科学基金项目(20070420001:200801017)

摘　　要：以快速城市化地区深圳市为研究区域,以1978、1986、1995和2005年4期Landsat MSS/TM影像为数据源,利用阈值结合NDVI指数法提取海岸线,计算海岸线分维数,系统分析了深圳市多期海岸线分维变化特征,并初步揭示快速城市化地区海岸线分维变化机制,为进一步掌握快速城市化地区人类活动对海岸带变化影响进行了探索与总结。研究结果表明:(1)不同类型海岸的海岸线分维不同,由基岩海岸、人工海岸到淤泥质海岸递减;(2)研究时段内,深圳市东海岸海岸线分维总体降低,西海岸总体上升;(3)人类活动对海岸线分维变化影响显著。人类活动强度与海岸线分维变化程度呈正相关,人类活动方式包括滩涂围垦和填海造地对海岸线的分维变化幅度影响不同,其中滩涂围垦使海岸线分维变化幅度较小,填海造地使海岸线分维变化幅度显著。Taking Shenzhen, a region of rapid urbanization, as the study area, using 1978, 1986, 1995 and 2005 Landsat MSS/TM images as data sources to extract coastlines with the method combined with threshold and NDVI, we calculate the coastline fractal dimension, systematically analyze the fractal dimension changes, and initially reveal the change mechanism of coastline in the region of rapid urbanization. The results show that： （1） different types of coasts have different fractal dimensions which descend from bedrock coasts, artificial coasts to mud coasts; （2） in the study period, the fractal dimension of east coast reduces while that of west coast increases; （3） human activity has a significant impact on the changes of fractal dimensions of coastlines. The intensity of human activities has a positive correlation with the changes of fractal dimensions, and the modes of human activities Land reclamation from the sea and beachs has different impacts on the changes of fractal dimensions. The impact of land reclamation from the sea is more significant than that from beachs.

关 键 词：海岸线分维 动态演变 人类活动 

分 类 号：K903[历史地理—人文地理学] P737.11[天文地球—海洋地质]