Simulation of future groundwater recharge using a climate model ensemble and SAR-image based soil parameter distributions — A case study in an intensively-used Mediterranean catchment

Herrmann, Frank; Baghdadi, Nicolas; Blaschek, Michael; Deidda, Roberto; Duttmann, Rainer; Jeunesse, Isabelle La; Sellami, Haykel; Vereecken, Harry; Wendland, Frank

doi:10.1016/j.scitotenv.2015.07.036

Cited by 21 publications

(5 citation statements)

References 56 publications

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“…These researchers applied the fully distributed, semi-empirical GROWA model (Herrmann et al, 2015;Kunkel and Wendland, 2002;Panagopoulos et al, 2015Panagopoulos et al, , 2016 and the fully distributed deterministic mGROWA model (Panagopoulos et al, 2017), which enables spatiotemporal discretization of the soil zone hydrodynamic evolution. Although the application of the mGROWA model to other Mediterranean basins and beyond (Ehlers et al, 2016;Herrmann et al, 2016;Tetzlaff et al, 2015) produced accurate results, the outcome for the RPB remained questionable due to a lack of reliable model input data and profound knowledge about the hydrodynamic evolution mechanisms (pathways of groundwater recharge from the surrounding marginal aquifer systems into the basin). These problems, accompanied by other critical questions and issues, resulted in eight motives that led us to establish the PHO.…”

Section: Motivationmentioning

confidence: 99%

Hydrologic and Geochemical Research at Pinios Hydrologic Observatory: Initial Results

Pisinaras¹,

Παναγόπουλος²,

Herrmann

et al. 2018

Vadose Zone Journal

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The Pinios Hydrologic Observatory (PHO) is located in the River Pinios basin, which is one of the most productive basins in Greece. The PHO was established to develop deep knowledge of water balance at the river basin scale and to improve understanding of the major hydrodynamic mechanisms to improve hydrological modeling and ultimately sustainable water resource management. The PHO comprises three meteorological stations, 12 groundwater monitoring sites, and one soil moisture monitoring site, which includes frequency domain reflectometry sensors (SoilNet) and a cosmic-ray neutron sensor (CRNS) probe. Although the PHO was recently established (at the end of 2015), the preliminary findings from data analysis are promising. Calculated reference evapotranspiration (ETo) gradients demonstrate differences regarding their annual cycle, total amount, and altitude level. Moreover, climate analysis indicates nocturnal mountain-valley winds. Groundwater level spatial distribution indicates the dominant recharge mechanisms to the alluvial aquifer system. These findings are also supported by the hydrochemical data analysis (electrical conductivity and, secondarily, NO 3 distribution). Locally elevated NO 3 concentrations are attributed to agricultural activities and call for review of the adopted farming practices. Results from the soil moisture monitoring site indicate a very good match between the CRNS probe and the average SoilNet data. Future perspectives of the PHO include geophysical surveys to accurately delineate the geometry of the groundwater system, the expansion of groundwater and soil moisture observation networks, and the application of the mGROWA hydrologic model to accurately simulate the hydrological processes in the PHO and upscale in the entire River Pinios basin. Finally, in support of the local farmers, we plan to develop and implement a distributed irrigation programming protocol in the entire area of the PHO.

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Section: Motivationmentioning

confidence: 99%

Hydrologic and Geochemical Research at Pinios Hydrologic Observatory: Initial Results

Pisinaras¹,

Παναγόπουλος²,

Herrmann

et al. 2018

Vadose Zone Journal

Self Cite

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“…The rise in temperatures can cause increases in potential ET [14]. Similarly, climate change has been reported to impact the amount and seasonality of P regime [15] which can alter surface runoff and streamflow [16][17][18][19], soil moisture [20], and GR rates [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of Potential Groundwater Recharge to Projected Climate Change Scenarios: A Site-Specific Study in the Nebraska Sand Hills, USA

Adane

Zlotnik

Rossman

et al. 2019

Water

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Assessing the relationship between climate forcings and groundwater recharge (GR) rates in semi-arid regions is critical for water resources management. This study presents the impact of climate forecasts on GR within a probabilistic framework in a site-specific study in the Nebraska Sand Hills (NSH), the largest stabilized sand dune region in the USA containing the greatest recharge rates within the High Plains Aquifer. A total of 19 downscaled climate projections were used to evaluate the impact of precipitation and reference evapotranspiration on GR rates simulated by using HYDRUS 1-D. The analysis of the decadal aridity index (AI) indicates that climate class will likely remain similar to the historic average in the RCP2.6, 4.5, and 6.0 emission scenarios but AI will likely decrease significantly under the worst-case emission scenario (RCP8.5). However, GR rates will likely decrease in all of the four emission scenarios. The results show that GR generally decreases by ~25% under the business-as-usual scenario and by nearly 50% in the worst-case scenario. Moreover, the most likely GR values are presented with respect to probabilities in AI and the relationship between annual-average precipitation and GR rate were developed in both historic and projected scenarios. Finally, to present results at sub-annual time resolution, three representative climate projections (dry, mean and wet scenarios) were selected from the statistical distribution of cumulative GR. In the dry scenario, the excessive evapotranspiration demand in the spring and precipitation deficit in the summer can cause the occurrence of wilting points and plant withering due to excessive root-water-stress. This may pose significant threats to the survival of the native grassland ecology in the NSH and potentially lead to desertification processes if climate change is not properly addressed.

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“…Moreover, the longest records of groundwater level histories measured by instruments are not more than 150 years in Europe and the United States (Liu, Gou, Zhang, & Chen, ). Consequently, it is necessary to reconstruct groundwater levels by utilizing a variety of methods to lengthen relatively short observational records (Dogrul, Kadir, Brush, & Chung, ; Herrmann, Baghdadi, & Blaschek, ; Jackson et al, ; Singh, Eldho, & Kumar, ; Tapoglou, Karatzas, Trichakis, & Varouchakis, ).…”

Section: Introductionmentioning

confidence: 99%

Tree rings: A key ecological indicator for reconstruction of groundwater depth in the lower Tarim River, Northwest China

et al. 2019

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Groundwater is becoming increasingly important in extremely arid areas due to climate change and human activities. Little is known, however, regarding the longterm dynamics of groundwater due to the lack of long-term historical records of groundwater depth data. In this study, we investigated the relationship between hydrometeorology and tree rings of Populus euphratica (P. euphratica) and the feasibility of reconstructing historical groundwater depths from these tree rings in the lower reaches of the Tarim River, an extremely arid area in China. Tree-ring growth of P. euphratica mainly reflected historical changes in regional water environments (including runoff and shallow groundwater), rather than climatic variables (including temperature, precipitation, relative humidity, and sunshine hours). Groundwater depth constituted the key environmental factor for directly controlling P. euphratica growth.Linear regression models using tree rings were developed to reconstruct historical changes of groundwater depths in the calendar year (January-December) and the growing season (April-August) from 1950 to 2015. Results tracked well with the main hydrological events in the study area. Our findings demonstrate that tree rings of P. euphratica are a key and effective ecological indicator for quantitatively reconstructing and elucidating historical changes of groundwater depth in the lower reaches of the Tarim River. Additionally, the suitable sampling range for establishing tree-ring chronologies of P. euphratica and reconstructing groundwater depth is 0-300 m from the river channel in the lower Tarim River. Taking into consideration the lagged effect between runoff of the Ecological Water Conveyance Project (EWCP), decrease in groundwater and tree growth, we recommend that the optimal implementation time of ecological water conveyance is between the previous September and November in the lower Tarim River. This application will effectively improve the groundwater environment in the current year and ensure the growth of riparian trees.

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Simulation of future groundwater recharge using a climate model ensemble and SAR-image based soil parameter distributions — A case study in an intensively-used Mediterranean catchment

Cited by 21 publications

References 56 publications

Hydrologic and Geochemical Research at Pinios Hydrologic Observatory: Initial Results

Hydrologic and Geochemical Research at Pinios Hydrologic Observatory: Initial Results

Sensitivity of Potential Groundwater Recharge to Projected Climate Change Scenarios: A Site-Specific Study in the Nebraska Sand Hills, USA

Tree rings: A key ecological indicator for reconstruction of groundwater depth in the lower Tarim River, Northwest China

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