학술논문
Multi-Sensor Imaging and Space-Ground Cross-Validation for 2010 Flood along Indus River, Pakistan.
Document Type
Article
Source
Subject
*FLOOD risk
*FLOODS
*OPTICAL sensors
*IMAGE analysis
*MODIS (Spectroradiometer)
*RADIOMETERS
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Language
ISSN
2072-4292
Abstract
Flood monitoring was conducted using multi-sensor data from space-borne optical, and microwave sensors; with cross-validation by ground-based rain gauges and stream flow stations along the Indus River; Pakistan. First; the optical imagery from the Moderate Resolution Imaging Spectroradiometer (MODIS) was processed to delineate the extent of the 2010 flood along Indus River; Pakistan. Moreover; the all-weather all-time capability of higher resolution imagery from the Advanced Synthetic Aperture Radar (ASAR) is used to monitor flooding in the lower Indus river basin. Then a proxy for river discharge from the Advanced Microwave Scanning Radiometer (AMSR-E) aboard NASA's Aqua satellite and rainfall estimates from the Tropical Rainfall Measuring Mission (TRMM) are used to study stream flow time series and precipitation patterns. The AMSR-E detected water surface signal was cross-validated with ground-based river discharge observations at multiple stream flow stations along the main Indus River. A high correlation was found; as indicated by a Pearson correlation coefficient of above 0.8 for the discharge gauge stations located in the southwest of Indus River basin. It is concluded that remote-sensing data integrated from multi spectral and microwave sensors could be used to supplement stream gauges in sparsely gauged large basins to monitor and detect floods. [ABSTRACT FROM AUTHOR]