000005755 001__ 5755
000005755 005__ 20220405152557.0
000005755 0247_ $$2DOI$$a10.1029/2022EF002737
000005755 037__ $$aSCART-2022-0054
000005755 100__ $$aVan Camp, M.
000005755 245__ $$aExtreme hydrometeorological events, a challenge for gravimetric and seismology networks
000005755 260__ $$c2022
000005755 520__ $$axtreme events will become more common due to global change, requiring enhanced monitoring and pushing conventional observation networks to their limits. This encourages us to combine all the possible sources of information to obtain a complete picture of extreme events and their evolution. This commentary builds on an example of the July 2021 catastrophic floods that hit northwest Europe, for which the use of seismometer and gravimeter captures complementary data and brings a new understanding of the event and its dynamics. A sudden increase in seismic noise coincides with the testimony reporting on a “tsunami” downstream of the geophysical station. Concurrently, the gravimeter showed increasing saturation of the weathered zone, showing less and less water accumulation and increasing runoff. When rain re-intensified after a 3-hour break, the subsoil’s saturation state induced an accelerated runoff increase, as revealed by the river flow, in a much stronger way than during the rainy episodes just before. We show that the gravimeter detected the saturation of the catchment subsoil and soil in real-time. When the rain re-intensified, this saturation resulted in a sudden, devastating and deadly flood. Our study opens up the possibility of integrating real-time gravity in early warning systems for such events.
000005755 594__ $$aNO
000005755 6531_ $$aFlash flood 2021
000005755 6531_ $$aVesdre River 
000005755 6531_ $$aMembach station
000005755 6531_ $$aEarly warning
000005755 6531_ $$aSuperconducting gravimeter
000005755 6531_ $$aBelgian seismic network
000005755 700__ $$ade Viron, O. 
000005755 700__ $$aDassargues, A.
000005755 700__ $$aDelobbe, L.
000005755 700__ $$aChanard, K.
000005755 700__ $$aGobron, K.
000005755 773__ $$pEarth's Future$$y2022
000005755 8560_ $$fmichel.vancamp@observatoire.be
000005755 85642 $$ahttps://agupubs-onlinelibrary-wiley-com.insu.bib.cnrs.fr/doi/10.1029/2022EF002737
000005755 905__ $$apublished in
000005755 980__ $$aREFERD