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Hydrology 2017, 4(2), 19;

Simulation of Groundwater Mounding Due to Irrigation Practice: Case of Wastewater Reuse Engineering Design

Snowy Mountains Engineering Corporation (SMEC), Sydney, New South Wales 2060, Australia
Academic Editor: Abdon Atangana
Received: 14 February 2017 / Revised: 4 March 2017 / Accepted: 17 March 2017 / Published: 23 March 2017
(This article belongs to the Special Issue Groundwater Flow)
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Mounding often occurs beneath engineering structures designed to infiltrate reuse water. AQTESOLV software and a spreadsheet solution for Hantush, together with soil moisture water balance (SWAGMAN farm model), were used for quantitatively predicting the height and extent of groundwater mounding underground to assess the groundwater-flow simulations of infiltration from a hypothetical irrigation site. Horizontal and vertical permeability, aquifer thickness, specific yield, and basin geometry are among the aquifer and recharge properties inputs. For 2.2 ha sites, the maximum heights of the simulated groundwater mound ranges up to 0.29 m. The maximum areal extent of groundwater mounding measured from the edge of the infiltration basins of 0.24 m ranges from 0 to 75 m. Additionally, the simulated height and extent of the groundwater mounding associated with a hypothetical irrigation infiltration basin for 2.2 ha development may be applicable to sites of different sizes, using the recharge rate estimated from the SWAGMAN farm model. For example, for a 2.2 ha site with a 0.0002 m/day recharge rate, the irrigation infiltration basin design capacity (and associated groundwater mound) would be the same as for a 1.1 ha site with a 0.0004 m/day recharge rate if the physical characteristics of the aquifer are unchanged. The study claimed that the present modelling approach overcomes the complications of solving the Hantush equation for transient flow. The approach utilised in this study can be applied for other purposes such as measuring the feasibility of infiltrating water, attenuation zone, risk mitigation essential for decision-makers and planning regulators in terms of environmental effects and water use efficiency. View Full-Text
Keywords: infiltration; recharge; mounding; wastewater impact; irrigation agriculture; sustainability infiltration; recharge; mounding; wastewater impact; irrigation agriculture; sustainability

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Yihdego, Y. Simulation of Groundwater Mounding Due to Irrigation Practice: Case of Wastewater Reuse Engineering Design. Hydrology 2017, 4, 19.

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