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Titel (primär) Assessment of small-diameter shallow wells for managed aquifer recharge at a site in southern Styria, Austria
Autor Händel, F.; Liu, G.; Fank, J.; Friedl, F.; Liedl, R.; Dietrich, P.;
Journal / Serie Hydrogeology Journal
Erscheinungsjahr 2016
Department MET;
Band/Volume 24
Heft 8
Sprache englisch;
POF III (gesamt) T34;
Keywords Austria; Small-diameter wells; Numerical modeling; Managed aquifer recharge; Field experiment
UFZ Querschnittsthemen RU5;
Abstract An approach to establish the recharge component of managed aquifer recharge (MAR) has recently been proposed that uses small-diameter shallow wells installed using relatively inexpensive drilling methods such as direct push. As part of further development of that approach, a generalized procedure is presented for a technical and economic assessment of the approach’s potential in comparison to other systems. Following this procedure, the use of small-diameter wells was evaluated both experimentally and numerically for a site located in southern Styria, Austria. MAR is currently done at the site using a horizontal pipe infiltration system, and system expansion has been proposed with a target rate of 12 l/s using small-diameter wells as one possible option. A short-duration single-well field recharge experiment (recharge rate 1.3–3.5 l/s) was performed (recharge by gravity only). Numerical modeling of the injection test was used to estimate hydraulic conductivity (K). Quasi-steady-state, single-well recharge simulations for different locations, as well as a long-term transient simulation, were performed using the K value calibrated from the field injection test. Results indicate that a recharge capacity of 4.1 l/s was achievable with a maximum head rise of 0.2 m at the injection well. Finally, simulations were performed for three different well fields (4, 6 and 8 wells, respectively) designed to infiltrate a target rate of 12 l/s. The experimental and numerical assessments, supported by a cost analysis of the small-diameter wells, indicate that the small-diameter wells are a viable, cost-effective recharge approach at this and other similar sites.
ID 18216
dauerhafte UFZ-Verlinkung
Händel, F., Liu, G., Fank, J., Friedl, F., Liedl, R., Dietrich, P. (2016):
Assessment of small-diameter shallow wells for managed aquifer recharge at a site in southern Styria, Austria
Hydrogeol. J. 24 (8), 2079 - 2091