Uncertainty in groundwater recharge estimation using groundwater level fluctuation and aquifer test

ABSTRACT For sustainable groundwater management the rate of recharge and specific yield are both most important elements in analysis resources, and, sometimes, estimation these parameters remains a challenge. This research presents combining approach water-table fluctuation method (WTF) with an aquifer test to estimate quantify their uncertainty. The methodology requires at least three wells: two instrumented observation wells level sensor for long-term monitoring pump well located nearby testing. interpretation was supported by Aqtsolv Demo software obtaining best fit proposed Tartakovsky-Neuman, varying, 2σ, between 9.4% 10.6%. Recharge estimated WTF, uncertainty is obtained propagating uncertainties about (Bayesian inference) recession dynamics WTF. stems from yield. applied on campus Federal University Pará, Belém, Brazil. 1078.9 mm, 03/sep/2020 30/sep/2021, associated 129.5 mm which equates range 33.9 39.8% terms precipitation. Through use cost-effective instrumentation methodology, replication that can be encouraged provide reliable estimates site specific. Such condition useful reduce predictive management.