Time-lapse microgravity surveys reveal water storage heterogeneity of a karst aquifer
Time‐lapse microgravity surveying combined with absolute gravity measurements is used to investigate water storage changes in a karst aquifer of ∼100 km2 area. The survey consists of 40 gravity stations measured with a relative gravimeter; absolute gravity is measured at three stations for each surv...
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| Veröffentlicht in: | Journal of Geophysical Research 2010-06, Vol.115 (B6), p.n/a |
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| creator | Jacob, Thomas Bayer, Roger Chery, Jean Le Moigne, Nicolas |
| description | Time‐lapse microgravity surveying combined with absolute gravity measurements is used to investigate water storage changes in a karst aquifer of ∼100 km2 area. The survey consists of 40 gravity stations measured with a relative gravimeter; absolute gravity is measured at three stations for each survey. In total, four gravity surveys are performed over a 2 year time period during consecutive wet and dry periods. Survey precisions range between 2.4 and 5 μGal, enabling statistically significant detection of 10 μGal change, i.e., ∼0.25 m equivalent water level change. Observed gravity changes are coherent between consecutive survey periods, i.e., net water withdrawal and net water recharge is observed, reaching changes as high as 22 μGal. Observed gravity changes allow refining evapotranspiration estimates, which may serve to improve the water budget of the aquifer. High‐and low‐gravity amplitude zones characterize the karst system, demonstrating spatially variable storage behavior. Geomorphologic considerations are invoked to explain the location of preferential zones of water storage, and a conceptual model of water storage is discussed for the studied karst. |
| doi_str_mv | 10.1029/2009JB006616 |
| format | Article |
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The survey consists of 40 gravity stations measured with a relative gravimeter; absolute gravity is measured at three stations for each survey. In total, four gravity surveys are performed over a 2 year time period during consecutive wet and dry periods. Survey precisions range between 2.4 and 5 μGal, enabling statistically significant detection of 10 μGal change, i.e., ∼0.25 m equivalent water level change. Observed gravity changes are coherent between consecutive survey periods, i.e., net water withdrawal and net water recharge is observed, reaching changes as high as 22 μGal. Observed gravity changes allow refining evapotranspiration estimates, which may serve to improve the water budget of the aquifer. High‐and low‐gravity amplitude zones characterize the karst system, demonstrating spatially variable storage behavior. Geomorphologic considerations are invoked to explain the location of preferential zones of water storage, and a conceptual model of water storage is discussed for the studied karst.</description><identifier>ISSN: 0148-0227</identifier><identifier>ISSN: 2169-9313</identifier><identifier>EISSN: 2156-2202</identifier><identifier>EISSN: 2169-9356</identifier><identifier>DOI: 10.1029/2009JB006616</identifier><language>eng</language><publisher>Washington, DC: Blackwell Publishing Ltd</publisher><subject>absolute gravity ; Aquifers ; Budgets ; Cryosphere ; Earth Sciences ; Earth, ocean, space ; Environmental Sciences ; Evapotranspiration ; Exact sciences and technology ; Geodetics ; Geophysics ; Global Changes ; Gravity ; Heterogeneity ; Hydrology ; Karst ; microgravity ; Ocean-atmosphere interaction ; Physics ; Polls & surveys ; Sciences of the Universe ; Water ; Water budget ; Water levels ; Water storage</subject><ispartof>Journal of Geophysical Research, 2010-06, Vol.115 (B6), p.n/a</ispartof><rights>Copyright 2010 by the American Geophysical Union.</rights><rights>2015 INIST-CNRS</rights><rights>Copyright 2010 by American Geophysical Union</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a5013-cee5b9e7190330f88a0e1d8dc7891caef773f7c7f9ee866775694e8f10c228503</citedby><cites>FETCH-LOGICAL-a5013-cee5b9e7190330f88a0e1d8dc7891caef773f7c7f9ee866775694e8f10c228503</cites><orcidid>0000-0001-9819-5165</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2009JB006616$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2009JB006616$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,314,777,781,882,1412,1428,11495,27905,27906,45555,45556,46390,46449,46814,46873</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=23065902$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-00496400$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Jacob, Thomas</creatorcontrib><creatorcontrib>Bayer, Roger</creatorcontrib><creatorcontrib>Chery, Jean</creatorcontrib><creatorcontrib>Le Moigne, Nicolas</creatorcontrib><title>Time-lapse microgravity surveys reveal water storage heterogeneity of a karst aquifer</title><title>Journal of Geophysical Research</title><addtitle>J. Geophys. Res</addtitle><description>Time‐lapse microgravity surveying combined with absolute gravity measurements is used to investigate water storage changes in a karst aquifer of ∼100 km2 area. The survey consists of 40 gravity stations measured with a relative gravimeter; absolute gravity is measured at three stations for each survey. In total, four gravity surveys are performed over a 2 year time period during consecutive wet and dry periods. Survey precisions range between 2.4 and 5 μGal, enabling statistically significant detection of 10 μGal change, i.e., ∼0.25 m equivalent water level change. Observed gravity changes are coherent between consecutive survey periods, i.e., net water withdrawal and net water recharge is observed, reaching changes as high as 22 μGal. Observed gravity changes allow refining evapotranspiration estimates, which may serve to improve the water budget of the aquifer. High‐and low‐gravity amplitude zones characterize the karst system, demonstrating spatially variable storage behavior. Geomorphologic considerations are invoked to explain the location of preferential zones of water storage, and a conceptual model of water storage is discussed for the studied karst.</description><subject>absolute gravity</subject><subject>Aquifers</subject><subject>Budgets</subject><subject>Cryosphere</subject><subject>Earth Sciences</subject><subject>Earth, ocean, space</subject><subject>Environmental Sciences</subject><subject>Evapotranspiration</subject><subject>Exact sciences and technology</subject><subject>Geodetics</subject><subject>Geophysics</subject><subject>Global Changes</subject><subject>Gravity</subject><subject>Heterogeneity</subject><subject>Hydrology</subject><subject>Karst</subject><subject>microgravity</subject><subject>Ocean-atmosphere interaction</subject><subject>Physics</subject><subject>Polls & surveys</subject><subject>Sciences of the Universe</subject><subject>Water</subject><subject>Water budget</subject><subject>Water levels</subject><subject>Water 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microgravity surveys reveal water storage heterogeneity of a karst aquifer</title><author>Jacob, Thomas ; Bayer, Roger ; Chery, Jean ; Le Moigne, Nicolas</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a5013-cee5b9e7190330f88a0e1d8dc7891caef773f7c7f9ee866775694e8f10c228503</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>absolute gravity</topic><topic>Aquifers</topic><topic>Budgets</topic><topic>Cryosphere</topic><topic>Earth Sciences</topic><topic>Earth, ocean, space</topic><topic>Environmental Sciences</topic><topic>Evapotranspiration</topic><topic>Exact sciences and technology</topic><topic>Geodetics</topic><topic>Geophysics</topic><topic>Global Changes</topic><topic>Gravity</topic><topic>Heterogeneity</topic><topic>Hydrology</topic><topic>Karst</topic><topic>microgravity</topic><topic>Ocean-atmosphere interaction</topic><topic>Physics</topic><topic>Polls & surveys</topic><topic>Sciences of the Universe</topic><topic>Water</topic><topic>Water budget</topic><topic>Water levels</topic><topic>Water storage</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jacob, Thomas</creatorcontrib><creatorcontrib>Bayer, Roger</creatorcontrib><creatorcontrib>Chery, Jean</creatorcontrib><creatorcontrib>Le Moigne, Nicolas</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Environment Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central 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Nicolas</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Time-lapse microgravity surveys reveal water storage heterogeneity of a karst aquifer</atitle><jtitle>Journal of Geophysical Research</jtitle><addtitle>J. Geophys. Res</addtitle><date>2010-06</date><risdate>2010</risdate><volume>115</volume><issue>B6</issue><epage>n/a</epage><issn>0148-0227</issn><issn>2169-9313</issn><eissn>2156-2202</eissn><eissn>2169-9356</eissn><abstract>Time‐lapse microgravity surveying combined with absolute gravity measurements is used to investigate water storage changes in a karst aquifer of ∼100 km2 area. The survey consists of 40 gravity stations measured with a relative gravimeter; absolute gravity is measured at three stations for each survey. In total, four gravity surveys are performed over a 2 year time period during consecutive wet and dry periods. Survey precisions range between 2.4 and 5 μGal, enabling statistically significant detection of 10 μGal change, i.e., ∼0.25 m equivalent water level change. Observed gravity changes are coherent between consecutive survey periods, i.e., net water withdrawal and net water recharge is observed, reaching changes as high as 22 μGal. Observed gravity changes allow refining evapotranspiration estimates, which may serve to improve the water budget of the aquifer. High‐and low‐gravity amplitude zones characterize the karst system, demonstrating spatially variable storage behavior. Geomorphologic considerations are invoked to explain the location of preferential zones of water storage, and a conceptual model of water storage is discussed for the studied karst.</abstract><cop>Washington, DC</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2009JB006616</doi><tpages>18</tpages><orcidid>https://orcid.org/0000-0001-9819-5165</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | absolute gravity Aquifers Budgets Cryosphere Earth Sciences Earth, ocean, space Environmental Sciences Evapotranspiration Exact sciences and technology Geodetics Geophysics Global Changes Gravity Heterogeneity Hydrology Karst microgravity Ocean-atmosphere interaction Physics Polls & surveys Sciences of the Universe Water Water budget Water levels Water storage |
| title | Time-lapse microgravity surveys reveal water storage heterogeneity of a karst aquifer |
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