Application of Remote Sensing Techniques to Environmental Assessment
Date Issued
2009
Date
2009
Author(s)
Su, Yuan-Fong
Abstract
With the fast advancement of remote sensing technology, efficient and timely monitoring of environmental changes has become a reality. Among all kinds of environmental monitoring, climate changes and water resources are of most concern due to their extensive and potentially devastating impact. In this dissertation, feasibilities of three types of environmental monitoring – coastal water quality monitoring, effect of landcover changes on ambient air temperature, and forest drought monitoring using remote sensing techniques are investigated. multivariate water quality estimation model which can take into consideration the combined effect of various seawater constituents on water surface reflectance was proposed. The multivariate model was found to be superior to traditional univariate models. Changes in coverage ratio of individual landcover types within a NOAA pixel affect the NOAA-pixel average air temperature. Forest drought monitoring involves drought classification using NDVI derived from SPOT images. Seasonal variations of NDVI and ambient air temperature were assessed using multispectral SPOT images and NOAA thermal images.
Subjects
environment monitoring and assessment
remote sensing
water quality
multivariate mode
landcover change
air temperature
drought
Type
thesis
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