Articles | Volume 21, issue 9
Hydrol. Earth Syst. Sci., 21, 4495–4516, 2017
https://doi.org/10.5194/hess-21-4495-2017

Special issue: Observations and modeling of land surface water and energy...

Hydrol. Earth Syst. Sci., 21, 4495–4516, 2017
https://doi.org/10.5194/hess-21-4495-2017

Research article 11 Sep 2017

Research article | 11 Sep 2017

Necessary storage as a signature of discharge variability: towards global maps

Kuniyoshi Takeuchi and Muhammad Masood

Data sets

Creation of the WATCH Forcing Data and Its Use to Assess Global and Regional Reference Crop Evaporation over Land during the Twentieth Century G. P. Weedon, S. Gomes, P. Viterbo, W. J. Shuttleworth, E. Blyth, H. Österle, J. C. Adam, N. Bellouin, and M. Best https://doi.org/10.1175/2011JHM1369.1

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Short summary
There are many global maps of hydrology and water resources, but none on necessary storage to smooth out discharge variability. This paper provides a methodology to create such a map, taking the Ganges–Brahmaputra–Meghna basin as an example. Necessary storage is calculated by a new method, intensity–duration–frequency curves of flood and drought (FDC–DDC). Necessary storage serves as a signature of hydrological variability and its geographical distribution provides new insights for hydrology.