The impact of on-site wastewater from high density cluster developments on groundwater quality

Morrissey, Patrick; Johnston, Paul; Gill, Laurence

doi:10.1016/j.jconhyd.2015.07.008

Cited by 15 publications

(13 citation statements)

References 17 publications

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“…Abramson et al (2014a,b) further used HYDRUS in a decision support system to investigate the costs and benefits of groundwater access and abstraction for non‐networked rural supplies. In yet other studies, Hassan et al (2008), Finch et al (2008), Sinclair et al (2014), and Morrissey et al (2015) modeled effluent distributions and possible groundwater pollution problems from on‐site wastewater treatment systems. We refer to the HYDRUS website for a more complete list of applications.…”

Section: Selected Hydrus Applicationsmentioning

confidence: 99%

Recent Developments and Applications of the HYDRUS Computer Software Packages

Šimůnek

Genuchten

Šejna³

2016

Vadose Zone Journal

719

336

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The HYDRUS-1D and HYDRUS (2D/3D) computer software packages are widely used finite-element models for simulating the one-and two-or three-dimensional movement of water, heat, and multiple solutes in variably saturated media, respectively. In 2008, Šimůnek et al. (2008b) described the entire history of the development of the various HYDRUS programs and related models and tools such as STANMOD, RETC, ROSETTA, UNSODA, UNSATCHEM, HP1, and others. The objective of this manuscript is to review selected capabilities of HYDRUS that have been implemented since 2008. Our review is not limited to listing additional processes that were implemented in the standard computational modules, but also describes many new standard and nonstandard specialized add-on modules that significantly expanded the capabilities of the two software packages. We also review additional capabilities that have been incorporated into the graphical user interface (GUI) that supports the use of HYDRUS (2D/3D). Another objective of this manuscript is to review selected applications of the HYDRUS models such as evaluation of various irrigation schemes, evaluation of the effects of plant water uptake on groundwater recharge, assessing the transport of particle-like substances in the subsurface, and using the models in conjunction with various geophysical methods.Abbreviations: CRS, cosmic-ray sensing; EC, electrical conductivity; ERT, electrical resistivity tomography; FEM, finite element mesh; GPR, ground-penetrating radar; GUI, graphical user interface; TDT, time-domain transmissometry.The HYDRUS-1D and HYDRUS (2D/3D) software packages (Šimůnek et al., 2008b) are finite-element models for simulating the one-and two-or three-dimensional movement of water, heat, and multiple solutes in variably saturated media, respectively. The standard versions, as well as various specialized add-on modules, of the HYDRUS programs numerically solve the Richards equation for saturated-unsaturated water flow and convection-dispersion type equations for heat and solute transport. The flow equation incorporates a sink term to account for water uptake by plant roots as a function of water and salinity stress. Both compensated and uncompensated water uptake by roots can be considered. The heat transport equation considers movement by both conduction and convection with flowing water. The governing convection-dispersion solute transport equations are written in a relatively general form by including provisions for nonlinear, nonequilibrium reactions between the solid and liquid phases and linear equilibrium reactions between the liquid and gaseous phases. The transport models also account for convection and dispersion in the liquid phase as well as diffusion in the gas phase, thus permitting the models to simulate solute transport simultaneously in both the liquid and gaseous phases. Hence, both adsorbed and volatile solutes, such as pesticides and fumigants, can be considered.The solute transport equations further incorporate the effects of zero-order production, first-o...

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Section: Selected Hydrus Applicationsmentioning

confidence: 99%

Recent Developments and Applications of the HYDRUS Computer Software Packages

Šimůnek

Genuchten

Šejna³

2016

Vadose Zone Journal

719

336

View full text Add to dashboard Cite

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“…Sinclair et al (2014a) also used HYDRUS-2D to simulate different lateral flow sand filters in on-site wastewater treatments after septic tanks showing poor removal rates and effluent exceeding 1 mg P/l concentration at the end of the study. Morrissey et al (2015) studied with HYDRUS-2D the impact of unsewered cluster housing simulating the attenuation of contaminants through the unsatured zone revealing limited impact to groundwater quality, and used the calibrated model to simulate the impact of increasing the house density with new developments. All those studies were focused on studying transport and contamination effects but none of them introduced the time variable in the study in order to predict remaining lifetime.…”

Section: Towards Estimates Of Longevitymentioning

confidence: 99%

Long-term phosphorus removal in land treatment systems: Evaluation, experiences, and opportunities

Seguí

Hess

Sakrabani

et al. 2017

Critical Reviews in Environmental Science and Technology

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Excessive release of phosphorus (P) from urban wastewater into water bodies is a significant environmental concern. Land treatment systems (LTS) have been used for the last 150 years as a low cost, and low energy tertiary wastewater treatment. However their P removal capacity is limited by soil adsorption capacity. Accurate P-removal lifespan prediction is needed to provide confidence in this technology and to support long-term wastewater treatment planning. This review outlines the history of LTS, describes the main P removal processes in soils and critically analyses the research methods used to date to assess long term P removal in soil. Finally, an assessment is made of the role that modelling tools can play in aiding our understanding of P processes in LTS soils and in forecasting system longevity.

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“…We selected the case study by searching for an area highly comparable with other metropolitan regions in Latin America and the developing world. Salta already has several sectors with high levels of nitrate in groundwater due to the lack of proper onsite wastewater planning [34,35]. The selection of this case study is also related to the high dependence of this city and metropolitan sectors on groundwater resources.…”

Section: Introductionmentioning

confidence: 99%

A Simple Method for Identifying Appropriate Areas for Onsite Wastewater Treatment

Iribarnegaray

Correa

Sorani

et al. 2021

Water

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Onsite Domestic Wastewater Treatment Systems (ODWTS) are increasingly important for treating domestic wastewater in metropolitan contexts, especially in suburban sectors isolated from sewer networks and centralized treatment plants. When ODWTS are not correctly planned and located in suitable places, or are not properly designed, they can cause groundwater contamination and generate risks for human health. This work presents a Spatial Decision Support System (SDSS) to zone specific areas based on a few simple parameters. The proposed tool can be easily adapted to different contexts, even where institutional capacities are low. Results obtained in the metropolitan area of the Lerma Valley (Salta, Argentina) show strong contradictions between our zoning and current urbanization features in the study area. As a result, environmental impacts and health hazards are likely to manifest in the short or medium term. The sectors with the best receptivity conditions were found in the southern sector of the study area. We argue that ODWTS can be safely implemented in many areas as long as this concept is embedded in urban planning initiatives, which usually also require the consolidation or development of appropriate institutions and control systems.

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The impact of on-site wastewater from high density cluster developments on groundwater quality

Cited by 15 publications

References 17 publications

Recent Developments and Applications of the HYDRUS Computer Software Packages

Recent Developments and Applications of the HYDRUS Computer Software Packages

Long-term phosphorus removal in land treatment systems: Evaluation, experiences, and opportunities

A Simple Method for Identifying Appropriate Areas for Onsite Wastewater Treatment

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