000005827 001__ 5827
000005827 005__ 20220914162421.0
000005827 037__ $$aCTALK-2022-0073
000005827 100__ $$aVan Noten, Koen
000005827 245__ $$aBedrock depth characterisation below public buildings with a geothermal interest using ambient seismic noise
000005827 260__ $$c2022
000005827 269__ $$c2022-09-08
000005827 520__ $$aBelow several public buildings in Brussels (Belgium), one aims to transform the main heating source away from hydrocarbons towards shallow geothermal energy. The GeoCamb project investigates the geothermal potential of the Brabant Massif bedrock below Brussels. For each potential project, however, prospecting drilling and hydrogeological surveys costs remain high. With the use of three-component seismic nodes, either mounted on tripods installed on sealed surfaces or classic spikes coupled to the ground, we use passive seismic ambient noise methods to characterize bedrock variation around the geothermal open wells below the buildings of interest. Bedrock depth variation is studied by converting resonance frequency (f0), obtained from H/V spectral ratio analysis of ambient noise, to depth using a f0-to-depth power law relation specifically developed for Brussels. With additional ongoing urban array measurements, we aim to understand which impedance contrast the H/V curve represents in this urban setting. We currently hypothesize that the main H/V peak below Brussels illuminates the sediment-weathered bedrock contrast, rather than the weathered-intact bedrock interface deeper within the Brabant Massif.
000005827 536__ $$aB2/$$c191/$$fP1/GEOCAMB
000005827 594__ $$aNO
000005827 700__ $$aZeckra, Martin
000005827 773__ $$t3rd European conference on earthquake engineering and seismology
000005827 8560_ $$fkoen.vannoten@observatoire.be
000005827 8564_ $$s964064$$uhttp://publi2-as.oma.be/record/5827/files/3ECEES2022_VanNotenetal_GeoCamb.pdf
000005827 8564_ $$s16723$$uhttp://publi2-as.oma.be/record/5827/files/3ECEES2022_VanNotenetal_GeoCamb.gif?subformat=icon$$xicon
000005827 8564_ $$s20947$$uhttp://publi2-as.oma.be/record/5827/files/3ECEES2022_VanNotenetal_GeoCamb.jpg?subformat=icon-180$$xicon-180
000005827 906__ $$aContributed
000005827 980__ $$aCTALKCONT