Floodplain water storage in the Negro River basin estimated from microwave remote sensing of inundation area and water levels

被引:174
作者
Frappart, F
Seyler, F
Martinez, JM
León, JG
Cazenave, A
机构
[1] Observ Midi Pyrenees, Lab Etud Geophys & Oceanog Spatiale,UMR 5566, CNES,CNRS, IRD,UPS, F-31401 Toulouse 9, France
[2] Observ Midi Pyrenees, Lab Mecanismes & Transferts Geol, UMR 5563, CNRS,IRD,UPS, F-31400 Toulouse, France
[3] Maison Teledetect, Lab Mecanismes & Transferts Geol, UMR 5563,CNRS, IRD,UPS, F-34093 Montpellier 5, France
关键词
remote sensing; hydrology; altimetry; water level and water volume variation;
D O I
10.1016/j.rse.2005.08.016
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The objective of this study is to determine spatio-temporal variations of water volume over inundated areas located in large river basins using combined observations from the Synthetic Aperture Radar (SAR) onboard the Japanese Earth Resources Satellite (JERS-1), the Topex/poseidon (T/P) altimetry satellite, and in-situ hydrographic stations. Ultimately, the goal is to quantify the role of floodplains for partitioning water and sediment fluxes over the great fluvial basins of the world. SAR images are used to identify the type of surface (open water, inundated areas, forest) and, hence, the areas covered with water. Both radar altimetry data and in-situ hydrographic measurements yield water level time series. The basin of the Negro River, the tributary which carries the largest discharge to the Amazon River, was selected as a test site. By combining area estimates derived from radar images classification with changes in water level, variations of water volume (focusing on a seasonal cycle) have been obtained. The absence of relationship between water volume and inundated area, reflecting the diverse and widely dispersed floodplains of the basin, is one of the main result of this study. (C) 2005 Elsevier Inc. All rights reserved.
引用
收藏
页码:387 / 399
页数:13
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