New groundwater recharge model for water table fluctuation method calibration using easily available data

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F25%3A10169796" target="_blank" >RIV/00025798:_____/25:10169796 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/25:10499115

Result on the web

<a href="https://doi.org/10.1016/j.jhydrol.2025.133685" target="_blank" >https://doi.org/10.1016/j.jhydrol.2025.133685</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jhydrol.2025.133685" target="_blank" >10.1016/j.jhydrol.2025.133685</a>

Result language

angličtina

Original language name

New groundwater recharge model for water table fluctuation method calibration using easily available data

Original language description

Groundwater recharge is an essential input for groundwater resources management, yet it is not directly measurable. Here we present a new model for calibrating specific yield of unconfined aquifers, which improves the estimation of groundwater recharge using the water table fluctuation method. The new soil moisture deficit model of root zone (for shallow and deep rooting plants separately) was derived from existing bucket models. The model simulates water table levels in wells using easily available data, namely precipitation and air temperature. The specific yield was calibrated by comparing the modelled and observed water table. The observed water table and the calibrated specific yield are used in water table fluctuation method to determine groundwater recharge. The model was applied to 9 wells in the lowland along the river Labe (Czechia), for which decadal records of water table fluctuation are available. The obtained values of specific yield ranged from 5 % to 17 %, which is realistic for the studied fluvial aquifers with unconfined water table. The results were compared with an established model HYDRUS-1D, which yielded similar results. The obtained long-term mean groundwater recharge is in alignment with the outcomes of a previous study for the nearby sites. The proposed model provides a valuable tool for calibrating the specific yield, thus overcoming a major obstacle in determining groundwater recharge using the water table fluctuation method. Furthermore, the model can potentially be employed to estimate the impact of future climate characteristics on groundwater resources, as it can capture changes in vegetation patterns.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10503 - Water resources

Project

<a href="/en/project/SS02030040" target="_blank" >SS02030040: Prediction, Evaluation and Research for Understanding National sensitivity and impacts of drought and climate change for Czechia</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Hydrology

ISSN

0022-1694

e-ISSN

1879-2707

Volume of the periodical

661

Issue of the periodical within the volume

133685

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

15

Pages from-to

nestránkováno

UT code for WoS article

001546893900005

EID of the result in the Scopus database

2-s2.0-105008220011