Drywell infiltration and hydraulic properties in heterogeneous soil profiles

Sasidharan, Salini; Bradford, Scott A.; Šimůnek, Jiřı́; Kraemer, Stephen R.

doi:10.1016/j.jhydrol.2018.12.073

Cited by 29 publications

(26 citation statements)

References 32 publications

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“…In this study, the receptive medium is regarded as homogeneous, and the effects of changing the material properties are not assessed. In this sense, the available literature suggests that well, trench and wadi infiltration rates are positively correlated to higher hydraulic conductivity (Sasidharan et al 2020a;Heilweil et al 2015;Händel et al 2014), while the sensitivity to other material parameters such as water content (θ r ), saturated water content (θ s ), n, and α is not significant (Händel et al 2014;Heilweil et al 2015;Quichimbo et al 2020;Sasidharan et al 2019).…”

Section: Limitationsmentioning

confidence: 99%

“…The trench has a depth of 3 m and a width of 1 m based on average values mentioned in the literature (Bouwer 2002;Schueler 1987). The vadose zone well is 5 m in depth and 1 m in diameter using the same criteria (Bouwer 2002;Liang et al 2018;Sasidharan et al 2019). In the shallow WT scenarios, the domain dimensions are set as 20 m in the vertical direction and 25 m in the horizontal one.…”

Section: Model Dimensionsmentioning

confidence: 99%

“…Several studies have assessed the use of trenches and wells to enhance surface (SF) infiltration, and the key findings are summarised in the Appendix. Sasidharan et al (2018Sasidharan et al ( , 2019Sasidharan et al ( , 2020a and Heilweil et al (2015) focus on the numerical modelling of vadose zone wells and trenches, respectively. The research of and Kalwa (2013) tries to bring a solution to the problem posed by evaporation in wadi dams.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stormwater harvesting in ephemeral streams: how to bypass clogging and unsaturated layers

et al. 2021

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To cope with water scarcity in drylands, stormwater is often collected in surface basins and subsequently stored in shallow aquifers via infiltration. These stormwater harvesting systems are often accompanied by high evaporation rates and hygiene problems. This is commonly a consequence of low infiltration rates, which are caused by clogging layers that form on top of the soil profile and the presence of a thick vadose zone. The present study aims to develop a conceptual solution to increase groundwater recharge rates in stormwater harvesting systems. The efficiency of vadose-zone wells and infiltration trenches is tested using analytical equations, numerical models, and sensitivity analyses. Dams built in the channel of ephemeral streams (wadis) are selected as a study case to construct the numerical simulations. The modelling demonstrated that vadose-zone wells and infiltration trenches contribute to effective bypassing of the clogging layer. By implementing these solutions, recharge begins 2250–8100% faster than via infiltration from the bed surface of the wadi reservoir. The sensitivity analysis showed that the recharge rates are especially responsive to well length and trench depth. In terms of recharge quantity, the well had the best performance; it can infiltrate up to 1642% more water than the reservoir, and between 336 and 825% more than the trench. Moreover, the well can yield the highest cumulative recharge per dollar and high recharge rates when there are limitations to the available area. The methods investigated here significantly increased recharge rates, providing practical solutions to enhance aquifer water storage in drylands.

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Section: Limitationsmentioning

confidence: 99%

Section: Model Dimensionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stormwater harvesting in ephemeral streams: how to bypass clogging and unsaturated layers

et al. 2021

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“…For example, Sasidharan et al. (2018, 2019, 2020) have recently used HYDRUS‐2D (Radcliffe and Šimůnek, 2010) in combination with the reservoir boundary to assess experimental data collected at two dry wells, as well as the effects of heterogeneity on drywell infiltration and groundwater recharge, without implicitly accounting for clogging.…”

Section: Introductionmentioning

confidence: 99%

Scaling factors in HYDRUS to simulate a reduction in hydraulic conductivity during infiltration from recharge wells and infiltration basins

Glaß

Šimůnek

Stefan

2020

Vadose Zone Journal

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Managed aquifer recharge (MAR) represents a promising technique to cope with increasing water stress worldwide. However, it can be challenging to operate MAR systems, especially concerning clogging. Clogging reduces the infiltration capacity and system efficiency of a MAR facility. Processes that cause clogging are difficult to quantify and assess, and their simulations in MAR schemes have so far been limited. The variably saturated water flow model HYDRUS-2D was therefore modified to include time-variable hydraulic conductivities to more realistically represent clogging at the infiltration interface of infiltration basins and recharge wells. An exponential function with a time-variable scaling factor was implemented into HYDRUS to vary the soil hydraulic conductivity over time during simulations. The new approach was tested, in combination with the reservoir boundary condition, by simulating two-dimensional cross-sections of two three-dimensional laboratory experiments representing recharge from infiltration basins and injection wells. With the help of the time-variable scaling factor, the increasing ponding depth in both experiments due to progressive clogging was reproduced. Hypothetical simulations with various well configurations, soils, and injection rates indicate that clogging influences the infiltration volumes and subsurface infiltration area, which should be considered during the planning of MAR systems. The approach can be used to evaluate the resulting infiltration capacity numerically and to help with the operation and design of MAR facilities. However, further research is required to fully understand and integrate the processes that lead to clogging at MAR facilities into numerical simulations.

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“…Varying water sources have been used for MAR, including river water (Scanlon et al, 2016), stormwater (Page et al, 2016), treated wastewater (Bugan et al, 2016), high-magnitude flows (Bachand et al, 2014;, and desalinated water (Kimrey, 1989). Dillon et al (2019) provide a comprehensive summary of existing MAR methods such as river-bank filtration, infiltration basins, aquifer storage and recovery, soil aquifer treatment, and vadose zone infiltration devices (e.g., drywells, see Sasidharan et al, 2018Sasidharan et al, , 2019.…”

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confidence: 99%

Identifying Agricultural Managed Aquifer Recharge Locations to Benefit Drinking Water Supply in Rural Communities

Marwaha

Kourakos

Levintal

et al. 2021

Water Resources Research

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Groundwater access has allowed for significant social and economic development, improving food security and livelihoods worldwide (Giordano, 2009). However, growing populations and socioeconomic development have required the expansion of irrigated agriculture and urbanization into areas with limited precipitation and inadequate surface water access, forcing a six-fold increase in global groundwater withdrawals over the last century (Bierkens & Wada 2019). Over two billion people and more than 40% of the world's agricultural production systems rely on groundwater as their primary water source, and it now accounts for one-third of the global freshwater supply (Alley et al., 2002; Döll et al., 2012; Famiglietti, 2014). This development threatens groundwater resources and is apparent in high rates of aquifer depletion and degradation around the world (Gleeson et al., 2020). Decreasing reliability of surface water and depleted groundwater aquifers in groundwater-dependent regions severely impacts domestic water supplies (Hanak et al., 2019), food security (Dalin et al., 2017; Gumidyala et al., 2020), and natural ecosystems (Bierkens & Wada, 2019). This is especially the case in arid and semiarid regions where poorly monitored and often unregulated pumping has contributed to many negative impacts including lowered groundwater levels (

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Drywell infiltration and hydraulic properties in heterogeneous soil profiles

Cited by 29 publications

References 32 publications

Stormwater harvesting in ephemeral streams: how to bypass clogging and unsaturated layers

Stormwater harvesting in ephemeral streams: how to bypass clogging and unsaturated layers

Scaling factors in HYDRUS to simulate a reduction in hydraulic conductivity during infiltration from recharge wells and infiltration basins

Identifying Agricultural Managed Aquifer Recharge Locations to Benefit Drinking Water Supply in Rural Communities

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