caa a22 4500 445815574 CHVBK 20180317145227.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10040-010-0695-9 doi (NATIONALLICENCE)springer-10.1007/s10040-010-0695-9 Groundwater recharge in Pleistocene sediments overlying basalt aquifers in the Palouse Basin, USA: modeling of distributed recharge potential and identification of water pathways [Elektronische Daten] [Roel Dijksma, Erin Brooks, Jan Boll] Recharge de sédiments pléistocènes surmontant des aquifères basaltiques dans le Palouse Basin, USA modélisation du potentiel de répartition de charge et identification de chenaux d'écoulement Groundwater levels in basalt aquifers around the world have been declining for many years. Understanding water pathways is needed for solutions like artificial drainage. Water supply in the Palouse Basin, Washington and Idaho, USA, primarily relies on basalt aquifers. This study presents a combination of modeling and field observations to understand the spatial distribution of recharge pathways in the overlying Pleistocene sediments. A spatially distributed model was used to quantify potential recharge rates. The model shows clearly that recharge predominantly occurs through non-argilic soils and soils that are not underlain by fine-grained sediments, i.e. the upper area of the watershed. A field survey was conducted to determine recharge pathways from this area. It revealed 83 perennial springs. Drillings near springs showed connection of coarse-grained layers within the fine-grained Sediments of Bovill to these springs. Such layers, with streambed-like features, act as paleo-channels. Water from one of these coarse-grained layers had a similar electrical conductivity (200 μS cm-1) to water from a downstream perennial spring, also suggesting the existence of a lateral conduit for deep percolation water. Springer-Verlag, 2010 Groundwater exploration nationallicence Basalt aquifers nationallicence Numerical modeling nationallicence Sustainable water use nationallicence USA nationallicence Dijksma Roel Hydrology and Quantitative Water Management Group, Department of Environmental Science, Wageningen University, PO Box 47, 6700 AA, Wageningen, The Netherlands aut Brooks Erin Biological and Agricultural Engineering, University of Idaho, 83844-2060, Moscow, ID, USA aut Boll Jan Biological and Agricultural Engineering, University of Idaho, 83844-2060, Moscow, ID, USA aut Hydrogeology Journal Springer-Verlag 19/2(2011-03-01), 489-500 1431-2174 19:2<489 2011 19 10040 https://doi.org/10.1007/s10040-010-0695-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10040-010-0695-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dijksma Roel Hydrology and Quantitative Water Management Group, Department of Environmental Science, Wageningen University, PO Box 47, 6700 AA, Wageningen, The Netherlands aut NATIONALLICENCE 700 1- Brooks Erin Biological and Agricultural Engineering, University of Idaho, 83844-2060, Moscow, ID, USA aut NATIONALLICENCE 700 1- Boll Jan Biological and Agricultural Engineering, University of Idaho, 83844-2060, Moscow, ID, USA aut NATIONALLICENCE 773 0- Hydrogeology Journal Springer-Verlag 19/2(2011-03-01), 489-500 1431-2174 19:2<489 2011 19 10040 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer