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基于MANN-KENDALL方法的胶东半岛海岸带NDVI趋势分析
Analysis of NDVI trends in the coastal zone based on Mann-Kendall test: A case in the Jiaodong peninsula
投稿时间:2009-09-02??修订日期:2010-02-01
DOI:
中文关键词:??NDVI,时间序列,Mann-Kendall趋势分析,海岸带,胶东半岛
英文关键词:NDVI, time series, Mann-Kendall test, coastal zone
基金项目:山东省自然科学基金重点项目
作者单位E-mail
刘亚龙?鲁东大学地理与规划学院?liuyalong008@163.com?
王庆?鲁东大学海岸研究所??
毕景芝?鲁东大学海岸研究所??
张明明?鲁东大学海岸研究所??
邢前国?中国科学院烟台海岸带研究所??
施 平?中国科学院烟台海岸带研究所??
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中文摘要:
??????利用1998~2008年SPOT/VEGETATION逐旬共372期NDVI时间序列影像数据,引入Mann-Kendall非参数趋势检验方法,分析了胶东半岛最近10年来的植被NDVI变化趋势。结果表明,最近10年来,胶东半岛植被NDVI变化趋势以衰减区域居主导地位。其中,有明显衰减变化趋势的区域占半岛总面积的19.3%,有明显增强变化趋势的区域仅占半岛总面积的2.8%。NDVI衰减区域在空间上沿海岸线呈环状分布,从沿海岸到远离海岸,NDVI增强趋势逐渐明显,衰减最明显的区域大部分位于半岛沿海30km以内,植被增强趋势最明显区域位于半岛中部山地及沿海防护林地区。人类活动及其空间分布是NDVI变化的主要因素,其中沿海城市化、工业化和海岸湿地开发利用程度的提高导致NDVI衰减,而山地植被保护和海岸防护林建设导致NDVI增强。
英文摘要:
??????On the basis of 372 images of Spot/Vegetation from 1998 to 2008, the Mann-Kendall Non-parametric trend test method was used to analyze the NDVI trends at the Jiaodong penisula.During past decade, the areas with decreasing NDVI trends dominated the Jiaodong peninsula. About 19.3% of the whole area exhibited significant declining trends in NDVI, and merely 2.8% of areas showed increasing trends. The areas with decreasing trends distributed annularly along the coastline. The increasing trends gradually became more prominent from the coastline to the inner land. Most regions which manifested distinct weakening trends were mainly located within a distance of 30 km apart from the coastline. Regions showing obvious improvement were located in the central peninsula and the coastal forest shelterbelt areas. Human activity and their spatial distribution were the main causes of NDVI changes. Urbanization,industrialization and exploitation of the coastal wetlands resulted in the decaying of NDVI. Protection of the mountain vegetation and construction of the coastal forest shelterbelt promoted the increasing of NDVI.
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