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首页> 外文期刊>Journal of Geoscience and Environment Protection >Landsat Time Series Analysis of Vegetation Changes in Solar Energy Development Areas of the Lower Colorado Desert, Southern California
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Landsat Time Series Analysis of Vegetation Changes in Solar Energy Development Areas of the Lower Colorado Desert, Southern California

机译：南加州下科罗拉多沙漠太阳能开发区植被变化的Landsat时间序列分析

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Land cover change from renewable energy development in southernCalifornia is receiving increasing attention due to potential impacts onprotected area conservation, endangered species, and greenhouse gas emissions.This study was designed to quantify and map, for the first time, variationsdesert vegetation canopy density and related growth rates using 30 consecutiveyears of Landsat satellite image data across the Lower Colorado Desert. Thetime-series for mean normalized difference vegetation index (NDVI) valuessampled from each of the three major land cover types (shrubland, barren sanddune, and developed urban) showed no significant positive or negative trend invegetation canopy density. Three periods of significant decrease in NDVI weredetected during the drought periods of 1989-1990, 2002-2003, and 2013-2015,indicating that annual precipitation has been the main controller of shrublandcanopy growth and green cover. Shrubland canopy cover has been relativelystable in renewable energy development zones since the mid-2000s. NDVI changein the period after nearly all southern California solar energy developmentswere initiated (post-2010) could be attributed largely to topographic waterflow pathways through canyons and desert washes, both in and around all solarenergy development zones.
机译：由于对保护区保护，濒危物种和温室气体排放的潜在影响，加利福尼亚州南部可再生能源开发带来的土地覆盖变化受到越来越多的关注。本研究旨在首次量化和绘制沙漠植被冠层密度和相关生长的变化图使用连续30年的Landsat卫星图像数据横跨科罗拉多下沙漠的速度。从三种主要土地覆被类型（灌木丛，贫瘠的沙丘和发达的城市）中取样的平均归一化差异植被指数（NDVI）值的时间序列显示植被盖层密度没有明显的正或负趋势。在1989-1990年，2002-2003年和2013-2015年干旱期间，NDVI出现了三个显着下降的时期，这表明年降水量一直是灌木林冠层生长和绿色覆盖的主要控制因子。自2000年代中期以来，灌木丛的树冠覆盖在可再生能源开发区一直相对稳定。在几乎所有南加州太阳能开发项目启动之后（2010年后），NDVI的变化可能主要归因于所有太阳能开发区中和周围通过峡谷和沙漠冲刷的地形水流路径。

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