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Water resources research v.52 no.9, 2016년, pp.7244 - 7261   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Time‐lapse gravity data for monitoring and modeling artificial recharge through a thick unsaturated zone

Kennedy, Jeffrey (Department of Hydrology and Water Resources, University of Arizona, Tucson, Arizona, USA ) ; Ferré, Ty P. A. (Senate Department for Urban Development and the Environment, Berlin, Germany ) ; Creutzfeldt, Benjamin ;
  • 초록  

    Abstract Groundwater‐level measurements in monitoring wells or piezometers are the most common, and often the only, hydrologic measurements made at artificial recharge facilities. Measurements of gravity change over time provide an additional source of information about changes in groundwater storage, infiltration, and for model calibration. We demonstrate that for an artificial recharge facility with a deep groundwater table, gravity data are more sensitive to movement of water through the unsaturated zone than are groundwater levels. Groundwater levels have a delayed response to infiltration, change in a similar manner at many potential monitoring locations, and are heavily influenced by high‐frequency noise induced by pumping; in contrast, gravity changes start immediately at the onset of infiltration and are sensitive to water in the unsaturated zone. Continuous gravity data can determine infiltration rate, and the estimate is only minimally affected by uncertainty in water‐content change. Gravity data are also useful for constraining parameters in a coupled groundwater‐unsaturated zone model (Modflow‐NWT model with the Unsaturated Zone Flow (UZF) package).


    Key Points: Continuous gravity data are useful to measure infiltration rate and are relatively insensitive to the change in water content Little or no gravity change after 14 months indicates oscillatory steady state groundwater storage, with little accumulated storage The spatial sensitivity of gravity makes it better than groundwater levels for recharge‐basin‐scale infiltration model calibration


  • 주제어

    gravity .   microgravity .   time‐lapse gravity .   hydrogeophysics .   artificial recharge.  

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