堵河流域叶面积指数遥感反演及其时空变化
Leaf area index estimation and spatial-temporal change by remote sensing in Duhe watershed
水源涵养林具有涵养水源，保持水土，净化水质等作用。动态监测水源涵养林的生长状况及水文生态效益是目前的研究热点。本文以堵河流域水源涵养林为研究对象，主要考察了水源涵养林叶面积指数与相关植被指数之间的关系。利用冠层分析仪在堵河流域竹山以下的部分水源涵养林内随机采集地面样点80个，并建立了叶面积指数（LAI）与两种植被指数归一化植被指数（NDVI）和比值植被指数（RVI）的四种相关模型。研究发现，LAI-NDVI的幂函数模型拟合效果最好，相关系数达到了0.6308。利用该模型遥感反演了2010年堵河流域的叶面积指数，在此基础上推广到相同时段的1990年和1999年的TM影像上，并研究该地区叶面积指数的时空变化。结果显示，在1990至2010年之间，叶面积指数在[0,1]内的面积减小了90.5296%，而在[3,4]增加了1496.226%，生态恢复相当明显。
Water conservation forest has a great contribution to soil and water conservation and water purification. The dynamic monitoring of the growth condition of the Water conservation forest and the hydrologicaleco-efficiency have been the present research hot topics. The paper focuses on the Water conservation forests of Duhe river basin, and analyzes the relationship between the leaf area index of Water conservation forests and the relevant vegetation index. According to the 80 random sampling sites selected by canopy analysis system, four models of LAI, NDVI, and RVI are built respectively. The LAI of Duhe river basin in 2010 is inversed by the remote sensing of the model, and it is promoted to the TM images of same period in 1990 and 1999 on this basis as well as temporal and spatial variation of the LAI in this area. The results showed that ,LAI within [0,1] has reduced 90.5296% between 1990-2010, while within [3,4] has increased 1496.226% , so the ecological restoration is fairly obvious.
宋艳暾、郝蓉、陈方鑫、武晓菲
水利调查、水利规划环境科学理论环境科学技术现状
水源涵养林叶面积指数幂函数遥感时空变化
water conservation forestLAIpower functionremote sensingspatial and temporal changes
宋艳暾,郝蓉,陈方鑫,武晓菲.堵河流域叶面积指数遥感反演及其时空变化[EB/OL].(2013-01-07)[2025-08-02].http://www.paper.edu.cn/releasepaper/content/201301-320.点此复制
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