Print Email Facebook Twitter A time-series analysis framework for the flood-wave method to estimate groundwater model parameters Title A time-series analysis framework for the flood-wave method to estimate groundwater model parameters Author Obergfell, C.C.A. (TU Delft Water Resources) Bakker, M. (TU Delft Water Resources) Maas, Kees (KWR Water Research Institute) Date 2016 Abstract The flood-wave method is implemented within the framework of time-series analysis to estimate aquifer parameters for use in a groundwater model. The resulting extended flood-wave method is applicable to situations where groundwater fluctuations are affected significantly by time-varying precipitation and evaporation. Response functions for time-series analysis are generated with an analytic groundwater model describing stream–aquifer interaction. Analytical response functions play the same role as the well function in a pumping test, which is to translate observed head variations into groundwater model parameters by means of a parsimonious model equation. An important difference as compared to the traditional flood-wave method and pumping tests is that aquifer parameters are inferred from the combined effects of precipitation, evaporation, and stream stage fluctuations. Naturally occurring fluctuations are separated in contributions from different stresses. The proposed method is illustrated with data collected near a lowland river in the Netherlands. Special emphasis is put on the interpretation of the streambed resistance. The resistance of the streambed is the result of stream-line contraction instead of a semi-pervious streambed, which is concluded through comparison with the head loss calculated with an analytical two-dimensional cross-section model. Subject The NetherlandsTime series analysisGroundwater/surface-water relationsAnalytical solutionsNumerical modeling To reference this document use: http://resolver.tudelft.nl/uuid:08bb182e-b16c-45a0-a763-40b73ce43e9a DOI https://doi.org/10.1007/s10040-016-1436-5 ISSN 1431-2174 Source Hydrogeology Journal, 24 (7), 1807–1819 Part of collection Institutional Repository Document type journal article Rights © 2016 C.C.A. Obergfell, M. Bakker, Kees Maas Files PDF art_3A10.1007_2Fs10040_01 ... 1436_5.pdf 3 MB Close viewer /islandora/object/uuid:08bb182e-b16c-45a0-a763-40b73ce43e9a/datastream/OBJ/view