Vadose Zone Lag Time Effect on Groundwater Drought in a Temperate Climate
An essential factor in the propagation of drought, from meteorological drought to groundwater drought, is the delay between a precipitation event and the groundwater recharge reaching the groundwater table. This delay, which mainly occurs in the vadose zone of the hydrological cycle, is often poorly...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-07-01
|
| Series: | Water |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4441/12/8/2123 |
| _version_ | 1797561344185073664 |
|---|---|
| author | Buruk Kitachew Wossenyeleh Boud Verbeiren Jan Diels Marijke Huysmans |
| author_facet | Buruk Kitachew Wossenyeleh Boud Verbeiren Jan Diels Marijke Huysmans |
| author_sort | Buruk Kitachew Wossenyeleh |
| collection | DOAJ |
| description | An essential factor in the propagation of drought, from meteorological drought to groundwater drought, is the delay between a precipitation event and the groundwater recharge reaching the groundwater table. This delay, which mainly occurs in the vadose zone of the hydrological cycle, is often poorly studied. Therefore, this paper proposes a method for estimating the spatially distributed delay in the vadose zone using the kinematic wave approximation of Richards’ equation combined with the van Genuchten–Burdine and Brooks–Corey parametric model. The modeling was approached (1) using a detailed parametrization of soil and geological layers and (2) using lumped hydraulic and physical properties of geological layers. The results of both approaches were compared against the physically based flow model Hydrus-1D. This analysis shows that using a detailed parametrization of soil and geological layers results in good comparison, with a Nash–Sutcliffe efficiency of 0.89 for Brooks–Corey and 0.80 for van Genuchten–Burdine. The delay result of the Brooks–Corey model was incorporated into the groundwater recharge time series from 1980 to 2013 to analyze the effect of this delay on groundwater drought. The results show that the delay in the vadose zone influences groundwater drought characterization features such as the number, duration, and intensity of drought events. |
| first_indexed | 2024-03-10T18:12:37Z |
| format | Article |
| id | doaj.art-fd288e4a9ce84760bf9c90387e829885 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T18:12:37Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-fd288e4a9ce84760bf9c90387e8298852023-11-20T08:01:04ZengMDPI AGWater2073-44412020-07-01128212310.3390/w12082123Vadose Zone Lag Time Effect on Groundwater Drought in a Temperate ClimateBuruk Kitachew Wossenyeleh0Boud Verbeiren1Jan Diels2Marijke Huysmans3Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, BE-3001 Leuven, BelgiumDepartment of Hydrology and Hydraulic Engineering, Vrije Universiteit Brussel, Pleinlaan 2, BE-1050 Brussels, BelgiumDepartment of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, BE-3001 Leuven, BelgiumDepartment of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, BE-3001 Leuven, BelgiumAn essential factor in the propagation of drought, from meteorological drought to groundwater drought, is the delay between a precipitation event and the groundwater recharge reaching the groundwater table. This delay, which mainly occurs in the vadose zone of the hydrological cycle, is often poorly studied. Therefore, this paper proposes a method for estimating the spatially distributed delay in the vadose zone using the kinematic wave approximation of Richards’ equation combined with the van Genuchten–Burdine and Brooks–Corey parametric model. The modeling was approached (1) using a detailed parametrization of soil and geological layers and (2) using lumped hydraulic and physical properties of geological layers. The results of both approaches were compared against the physically based flow model Hydrus-1D. This analysis shows that using a detailed parametrization of soil and geological layers results in good comparison, with a Nash–Sutcliffe efficiency of 0.89 for Brooks–Corey and 0.80 for van Genuchten–Burdine. The delay result of the Brooks–Corey model was incorporated into the groundwater recharge time series from 1980 to 2013 to analyze the effect of this delay on groundwater drought. The results show that the delay in the vadose zone influences groundwater drought characterization features such as the number, duration, and intensity of drought events.https://www.mdpi.com/2073-4441/12/8/2123groundwater droughtgroundwater recharge delayvadose zonekinematic wave approximationdrought propagation |
| spellingShingle | Buruk Kitachew Wossenyeleh Boud Verbeiren Jan Diels Marijke Huysmans Vadose Zone Lag Time Effect on Groundwater Drought in a Temperate Climate Water groundwater drought groundwater recharge delay vadose zone kinematic wave approximation drought propagation |
| title | Vadose Zone Lag Time Effect on Groundwater Drought in a Temperate Climate |
| title_full | Vadose Zone Lag Time Effect on Groundwater Drought in a Temperate Climate |
| title_fullStr | Vadose Zone Lag Time Effect on Groundwater Drought in a Temperate Climate |
| title_full_unstemmed | Vadose Zone Lag Time Effect on Groundwater Drought in a Temperate Climate |
| title_short | Vadose Zone Lag Time Effect on Groundwater Drought in a Temperate Climate |
| title_sort | vadose zone lag time effect on groundwater drought in a temperate climate |
| topic | groundwater drought groundwater recharge delay vadose zone kinematic wave approximation drought propagation |
| url | https://www.mdpi.com/2073-4441/12/8/2123 |
| work_keys_str_mv | AT burukkitachewwossenyeleh vadosezonelagtimeeffectongroundwaterdroughtinatemperateclimate AT boudverbeiren vadosezonelagtimeeffectongroundwaterdroughtinatemperateclimate AT jandiels vadosezonelagtimeeffectongroundwaterdroughtinatemperateclimate AT marijkehuysmans vadosezonelagtimeeffectongroundwaterdroughtinatemperateclimate |