基于极化SAR和可见光/近红外成像光谱的土地退化研究

Proceedings of IEEE Topical Symposium on Combined Optical, Microwave, Earth and Atmosphere Sensing Pub Date : 1993-03-22 DOI:10.1109/COMEAS.1993.700227

T. W. Ray, T. Farr, J. V. Van Zyl

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引用次数: 0

摘要

莫哈韦沙漠的曼尼克斯盆地地区已被广泛用于种植苜蓿与中心枢纽喷灌系统。自1972年以来，一系列这样的油田已被废弃。1990年夏季，利用机载合成孔径雷达和机载可见/红外成像光谱仪采集数据。AIRSAR数据的极化分析揭示了废弃农田表面形态的变化，从耕作模式到风蚀模式。基于AVIRIS数据的归一化植被指数(NDVI)计算结果表明，撂荒前几年撂荒区植被支持度高于未垦区，但撂荒6年以上撂荒区植被密度低于未垦区。实地观测证实了遥感结果。

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Study Of Land Degradation With Polarimetric SAR And Visible/near-infrared Imaging Spectroscopy

The Manix Basin Area of the Mojave Desert has been used extensively for the cultivation of alfalfa with center-pivot sprinkler irrigation systems. Since 1972, a series of these fields has been abandoned. Data were collected using the Airborne Synthetic Aperture Radar and Airborne Visible/Infrared Imaging Spectrometer instruments in the summer of 1990. Polarimetric analysis of the AIRSAR data reveal changes in the morphology of the surfaces of the abandoned fields from cultivation patterns to patterns resulting from wind erosion. Calculation of a normalized difference vegetation index (NDVI) based on the AVIRIS data suggests that the abandoned fields support more vegetation than the undisturbed areas for the first few years of abandonment, but that the vegetation density on fields which have been abandoned for six or more years is lower than the undisturbed desert. Field observations confirm the remote sensing results.

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Proceedings of IEEE Topical Symposium on Combined Optical, Microwave, Earth and Atmosphere Sensing

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