Mon Dec 15, F. Flechtner
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Klemme, Alexandra, Warneke, Thorsten, Bovensmann, Heinrich, Weigelt, Matthias, Müller, Jürgen, Rixen, Tim, Notholt, Justus, and Lämmerzahl, Claus, 2024. Sediment Transport In South Asian Rivers High Enough To Impact Satellite Gravimetry. Hydrology and Earth System Sciences, 28:1527–1538, doi:10.5194/hess-28-1527-2024.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2024HESS...28.1527K,
author = {{Klemme}, Alexandra and {Warneke}, Thorsten and {Bovensmann}, Heinrich and {Weigelt}, Matthias and {M{\"u}ller}, J{\"u}rgen and {Rixen}, Tim and {Notholt}, Justus and {L{\"a}mmerzahl}, Claus},
title = "{Sediment Transport In South Asian Rivers High Enough To Impact Satellite Gravimetry}",
journal = {Hydrology and Earth System Sciences},
year = 2024,
month = apr,
volume = {28},
pages = {1527-1538},
abstract = "{Satellite gravimetry is used to study the global hydrological cycle. It
is a key component in the investigation of groundwater depletion
on the Indian subcontinent. Terrestrial mass loss caused by
river sediment transport is assumed to be below the detection
limit in current gravimetric satellites of the Gravity Recovery
and Climate Experiment Follow-On mission. Thus, it is not
considered in the calculation of terrestrial water storage (TWS)
from such satellite data. However, the Ganges and Brahmaputra
rivers, which drain the Indian subcontinent, constitute one of
the world's most sediment-rich river systems. In this study, we
estimate the impact of sediment mass loss within their
catchments on local trends in gravity and consequential
estimates of TWS trends. We find that for the Ganges-
Brahmaputra-Meghna catchment sediment transport accounts for (4
{\ensuremath{\pm}} 2) \% of the gravity decrease currently
attributed to groundwater depletion. The sediment is mainly
eroded from the Himalayas, where correction for sediment mass
loss reduces the decrease in TWS by 0.22 cm of equivalent water
height per year (14 \%). However, sediment mass loss in the
Brahmaputra catchment is more than twice that in the Ganges
catchment, and sediment is mainly eroded from mountain regions.
Thus, the impact on gravimetric TWS trends within the Indo-
Gangetic Plain - the main region identified for groundwater
depletion - is found to be comparatively small (< 2 \%).}",
doi = {10.5194/hess-28-1527-2024},
adsurl = {https://ui.adsabs.harvard.edu/abs/2024HESS...28.1527K},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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Mon Dec 15, F. Flechtner