Helmand river hydrologic studies using ALOS PALSAR InSAR and ENVISAT altimetry

Zhong Lu, Jin Woo Kim, Hyongki Lee*, C. K. Shum, Jianbin Duan, Motomu Ibaraki, Orhan Akyilmaz, Chung Hye Read

*Bu çalışma için yazışmadan sorumlu yazar

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26 Atıf (Scopus)


The Helmand River wetland represents the only fresh-water resource in southern Afghanistan and one of the least mapped water basins in the world. The relatively narrow wetland consists of mostly marshes surrounded by dry lands. In this study, we demonstrate the use of the Advanced Land Observing Satellite (ALOS) Phased Array type L-band Synthetic Aperture Radar (PALSAR) Interferometric SAR (InSAR) to detect the changes of the Helmand River wetland water level. InSAR images are combined with the geocentric water level measurements from the retracked high-rate (18-Hz) Environmental Satellite (Envisat) radar altimetry to construct absolute water level changes over the marshes. It is demonstrated that the integration of the altimeter and InSAR can provide spatio-temporal measurements of water level variation over the Helmand River marshes where in situ measurements are absent.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)320-333
Sayfa sayısı14
DergiMarine Geodesy
Basın numarası3
Yayın durumuYayınlandı - Tem 2009


This research is partially supported by grants from the National Geospatial-Intelligence Agency’s University Research Initiatives Program, HM1582-07-1-2024; the Climate, Water, and Carbon Program at the Ohio State University; and the U.S. Geological Survey Land Remote Sensing Program. PALSAR data are copyrighted by JAXA/METI 2006–2008 and are provided by ASF. Envisat radar altimetry data are provided by ESA/ESRIN. We also thank two anonymous reviewers for their constructive comments which have improved the manuscript.

FinansörlerFinansör numarası
U.S. Geological Survey Land Remote Sensing Program
Ohio State University

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