Measurement and Mapping of Riverine Environments by Optical Remote Sensing
2011
Legleiter, Carl J
The overarching objective of this investigation is to develop an advanced, operational capacity for characterizing river systems via remote sensing. We are particularly interested in methods for obtaining continuous, high resolution measurements of channel morphology and hydraulics from optical image data. The ability to efficiently and non-invasively map river corridors in this manner would afford a number of significant advantages to both the defense and research communities and could foster novel insight regarding fluvial processes. Before this potential can be realized, however, several important issues must be considered. More specifically, the overall goals of this project are to: 1. Improve our understanding of radiative transfer processes governing the interaction of electromagnetic energy with the atmosphere, air-water interface, water column, and substrate, and the measurement of this energy by a remote detector. Because these processes both enable and limit the retrieval of river information from optical data, this effort could lead to novel techniques for measuring depth, velocity, bottom composition, and water optical properties. 2. Systematically evaluate the ability of various remote sensing instruments to map a broad range of riverine environments. This assessment will help to define the extent to which different types of sensors deployed above diverse types of channels can provide the accuracy, precision, and dynamic range necessary for specific kinds of applications. 3. Develop more efficient procedures for extracting river information from optical data. Establishing integrated workflows for processing and analyzing such data will allow optical remote sensing to become a viable, operational tool for quantitative mapping of river systems.
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