Terrestrial water dynamics in the lower Ganges—estimates from ENVISAT and GRACE
In this study, the hydrodynamics of lower Ganges basin in India has been monitored using radar altimetry data from environmental satellite (ENVISAT) mission and microgravity data from the Gravity Recovery and Climate Experiment (GRACE) mission. River stage time series have been constructed for different virtual stations on the lower Ganges. Time series for the integrated water volume changes from microgravity measurements have also been constructed to characterize the seasonal and interannual fluctuation patterns in water storage and flux. The ENVISAT dataset indicates an average seasonal river stage fluctuation of 8 m in the lower Ganges River. The GRACE dataset reveals a seasonal fluctuation ranging from 0.18 to 0.40 m in the vertically integrated total water storage in the lower Ganges basin. The two independent datasets show broad similarity in the lower Ganges basin and outline the importance of space-based techniques for monitoring continental water resources.
KeywordAltimetry ENVISAT GRACE Virtual station Ganges River stage Time series
The first author wishes to acknowledge the French Embassy in India for the financial support (Cellules Mixtes de Recheche PhD Fellowship) during the visit to LEGOS at Toulouse, France for the accomplishment of this work.
- Central Ground Water Board of India (CGWB) (1997) Report of the ground water resource estimation committee, Ministry Of Water Resources, Government of India, New DelhiGoogle Scholar
- Central Ground Water Board of India (CGWB) (2006) Dynamic groundwater resources of India, 370 Central Ground Water Board of India, New Delhi. Available at http://cgwb.gov.in/
- Harvey KD, Grabs W (Eds.) (2003) WMO report of the GCOS/GTOS/HWRP expert meeting on hydrological data for global studies, Toronto, Canada, 18–20 Novemeber 2002 Report GCOS 84, Report GTOS 32,WMO/TD-No. 1156Google Scholar
- Koster RD, Houser PR, Engman ET, Kustas WP (1999) Remote sensing may provide unprecedented hydrological data. American Geophysical Union. Available at http://www.agu.org/eos_elec
- Ngo-Duc T, Laval K, Ramillien G, Polcher J, Cazenave A (2007) Validation of the land water storage simulated by Organising Carbon and Hydrology in Dynamic Ecosystems (ORCHIDEE) with Gravity Recovery and Climate Experiment (GRACE) data. Water Resour Res 43:W04427. doi: 10.1029/2006WR004941 CrossRefGoogle Scholar
- Parua PK (2010) The Ganga: water use in the Indian subcontinent. Springer, Berlin, pp 267–272. ISBN 9789048131020. doi: 10.1007/978-90-481-3103-7_14
- Rowlands DD, Luthcke SB, Klosko SM, Lemoine FG, Chinn DS, McCarthy JJ, Cox CM, Andersen OB (2005) Resolving mass flux at high spatial and temporal resolution using GRACE intersatellite measurements. Geophys Res Lett 32(L04310). doi: 10.1029/2004GL021908
- Singh RL (1994) India: a regional geography, National Geographical Society of India. UBS Publishers’ Distribution Limited, India, pp 183–252Google Scholar
- Tapley B, Ries J, Bettadpur S, Chambers D, Cheng M, Condi F, Gunter B, Kang Z, Nagel P, Pastor R, Pekker T, Poole S, Wang F (2005) GGM02—an improved Earth gravity field model from GRACE. J Geodesy 79. doi: 10.1007/s00190-005-0480-z, 467-478