caa a22 4500 445814845 CHVBK 20180317145223.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s10040-011-0761-y doi (NATIONALLICENCE)springer-10.1007/s10040-011-0761-y Exact and approximate analytical solutions of groundwater response to tidal fluctuations in a theoretical inhomogeneous coastal confined aquifer [Elektronische Daten] [Leonardo Monachesi, Luis Guarracino] Solutions analytiques exactes et approchées de la réponse des nappes d'eau souterraines aux fluctuations induites par la marée dans un aquifère captif côtier non homogène théorique The influence of hydraulic conductivity heterogeneity on tide-induced head fluctuations is presented for a theoretical coastal confined aquifer. The conceptual model assumes that the hydraulic conductivity increases linearly with the distance from the coastline. This type of heterogeneity has been observed in many alluvial coastal aquifers. An exact analytical solution that predicts induced head fluctuations is obtained in terms of a Hankel function. The exact solution can be approximated by a simple mathematical expression, valid for small rates of increase of hydraulic conductivity. Both exact and approximate solutions show significant differences from the classical solution obtained for a homogeneous aquifer. Near the coastline the amplitude of the induced head fluctuation is damped but it is enhanced as the distance to the coast increases. The time-lag between sea tide and induced head fluctuation in the aquifer is not linear; it behaves as a square-root type function leading to a faster transmission of the tidal fluctuation. Hypothetical examples show that the influence of hydraulic conductivity heterogeneity can be significant and should be considered for a correct description of the groundwater response. Springer-Verlag, 2011 Analytical solutions nationallicence Coastal aquifers nationallicence Groundwater flow nationallicence Heterogeneity nationallicence Tidal fluctuation nationallicence Monachesi Leonardo CONICET, Facultad de Ciencias Astronómicas y Geofísicas, Consejo Nacional de Investigaciones Científicas y Técnicas and Universidad Nacional de La Plata, Paseo del Bosque s/n, 1900, La Plata, Buenos Aires, Argentina aut Guarracino Luis CONICET, Facultad de Ciencias Astronómicas y Geofísicas, Consejo Nacional de Investigaciones Científicas y Técnicas and Universidad Nacional de La Plata, Paseo del Bosque s/n, 1900, La Plata, Buenos Aires, Argentina aut Hydrogeology Journal Springer-Verlag 19/7(2011-11-01), 1443-1449 1431-2174 19:7<1443 2011 19 10040 https://doi.org/10.1007/s10040-011-0761-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10040-011-0761-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Monachesi Leonardo CONICET, Facultad de Ciencias Astronómicas y Geofísicas, Consejo Nacional de Investigaciones Científicas y Técnicas and Universidad Nacional de La Plata, Paseo del Bosque s/n, 1900, La Plata, Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Guarracino Luis CONICET, Facultad de Ciencias Astronómicas y Geofísicas, Consejo Nacional de Investigaciones Científicas y Técnicas and Universidad Nacional de La Plata, Paseo del Bosque s/n, 1900, La Plata, Buenos Aires, Argentina aut NATIONALLICENCE 773 0- Hydrogeology Journal Springer-Verlag 19/7(2011-11-01), 1443-1449 1431-2174 19:7<1443 2011 19 10040 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer