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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/00216208:11310/25:10499115

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10503 - Water resources

Projekt

<a href="/cs/project/SS02030040" target="_blank" >SS02030040: Predikce, hodnocení a výzkum citlivosti vybraných systémů, vlivu sucha a změny klimatu v Česku</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Hydrology

ISSN

0022-1694

e-ISSN

1879-2707

Svazek periodika

661

Číslo periodika v rámci svazku

133685

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

nestránkováno

Kód UT WoS článku

001546893900005

EID výsledku v databázi Scopus

2-s2.0-105008220011