The Improved Hydrological Gravity Model for Moxa Observatory, Germany

Weise, A.; Jahr, T.

doi:10.1007/s00024-017-1546-6

Cited by 8 publications

(2 citation statements)

References 10 publications

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“…These studies mostly concern Europe (e.g. Creutzfeld et al 2010;Weise and Jahr, 2018;Van Camp et al 2006;Boy and Hinderer 2006) and hence the Djougou station is interesting by its unique location in Africa and because the investigation of monsoonal effects in West Africa has shown a clear intensification of rainfall and hydrological cycles that might be linked to climate changes (see Taylor et al 2017;Galle et al 2018, Nkrumah et al, 2019. Gravity data processing The gravity record has been processed jointly with air-pressure in a classical way starting with a preprocessing to remove the major disturbances (spikes, offsets, gaps, offsets) of instrumental and/or manmade origin.…”

Section: Introductionmentioning

confidence: 99%

A study of the monsoonal hydrology contribution using a 8-yr record (2010–2018) from superconducting gravimeter OSG-060 at Djougou (Benin, West Africa)

Hinderer

Hector

Riccardi

et al. 2020

Geophysical Journal International

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SUMMARY We analyse a nearly 8-yr record (2010–2018) of the superconducting gravimeter OSG-060 located at Djougou (Benin, West Africa). After tidal analysis removing all solid Earth and ocean loading tidal contributions and correcting for the long-term instrumental drift and atmospheric loading, we obtain a gravity residual signal which is essentially a hydrological signal due to the monsoon. This signal is first compared to several global hydrology models (ERA, GLDAS and MERRA). Our superconducting gravimeter residual signal is also superimposed onto episodic absolute gravity measurements and to space gravimetry GRACE data. A further comparison is done using local hydrological data like soil moisture in the very superficial layer (0–1.2 m), water table depth and rainfall. The temporal evolution of the correlation coefficient between the gravity observation and both the soil moisture and the water table is well explained by the direct infiltration process of rain water together with the lateral transfer discharging the water table. Finally, we compute the water storage changes (WSC) using a simulation based on the physically based Parflow-CLM numerical model of the catchment, which solves the water and energy budget from the impermeable bedrock to the top of the canopy layer using the 3-D Richards equation for the water transfers in the ground, the kinematic wave equation for the surface runoff and a land surface model (CLM) for the energy budget and evapotranspiration calculation. This model forced by rain is in agreement with evapotranspiration and stream flow data and leads to simulated water storage changes that nicely fit to the observed gravity signal. This study points out the important role played by surface gravity changes in terms of a reliable proxy for water storage changes occurring in small catchments.

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Section: Introductionmentioning

confidence: 99%

A study of the monsoonal hydrology contribution using a 8-yr record (2010–2018) from superconducting gravimeter OSG-060 at Djougou (Benin, West Africa)

Hinderer

Hector

Riccardi

et al. 2020

Geophysical Journal International

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“…Other studies utilized gravimetry to characterize water flow in porous media (Güntner et al, 2017;Weise and Jahr, 2017) or to monitor fluids relevant for geothermal exploitation (Hinderer et al, 2016;Portier et al, 2018).…”

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confidence: 99%

Gravity as a tool to improve the hydrologic mass budget in karstic areas

Pivetta

Braitenberg

Gabrovšek

et al. 2021

Preprint

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Abstract. Monitoring the water movements in karstic areas is a fundamental but challenging task due to the complexity of the drainage system and the difficulty in deploying a network of observations. Gravimetry offers a valid complement to classical hydrologic measurements in order to characterize such systems in which the recharge process causes temporarily accumulation of large water volumes in the voids of the epi-phreatic system. We show an innovative integration of gravimetric and hydrologic observations that constrains a hydrodynamic model of the Škocjan cave system (Slovenia). We demonstrate how the inclusion of gravity observations improves water mass budget estimates for the Škocjan area based on hydrological observations only. Finally, the detectability of water storage variations in other karstic contexts is discussed with respect to the noise performances of spring and super-conducting gravimeters.

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