基于RS和GIS的现代黄河三角洲植被覆盖动态变化研究

RESEARCH ON DYNAMIC CHANGE OF VEGETATION COVER IN THE MODERN YELLOW RIVER DELTA BASED ON RS AND GIS

以配准后的4时相遥感影像数据为基础，应用归一化植被指数（NDVI），研究了现代黄河三角洲植被覆盖变化，探讨了植被演替的空间分布特征．结果表明，现代黄河三角洲植被演替活跃区主要集中在北部和东部近海岸区和东南部黄河新淤进区域．在过去27年间，植被覆盖面积呈增加趋势，植被累计增加面积91089．43hm^2．植被以低盖度植被为主，高盖度植被所占面积较小，但高盖度植被逐年增加，平均每年增加412．83hm^2．

Based on 4 period registration remote sensing data, vegetation cover change in the Modem Yellow River Delta was studied by using the normalized difference vegetation index （NDVI）. Space distribution character of vegetation succession was approached. The results are as follows： dynamic zone of vegetation succession concentrated mainly in north, east region near seacoast and new region deposited by the yellow fiver in southeast. During 27 years, vegetation cover area was tend to increase, and total increased area of vegetation was 91 089.43 hm^2. Vegetation in study area was main in lower coverage, vegetation in higher coverage was minor, but area of vegetation in higher coverage was increased yearly, with an average increase of 412.83 hm^2 per year.