Next Article in Journal
A Landslide Probability Model Based on a Long-Term Landslide Inventory and Rainfall Factors
Next Article in Special Issue
Modelling Recharge from Irrigation Developments with a Perched Water Table and Deep Unsaturated Zone
Previous Article in Journal
A Three-Dimensional Numerical Study of Wave Induced Currents in the Cetraro Harbour Coastal Area (Italy)
Previous Article in Special Issue
Sensibility Analysis of the Hydraulic Conductivity Anisotropy on Seepage and Stability of Sandy and Clayey Slope
Open AccessArticle

Modelling the Effect of Efficiency Measures and Increased Irrigation Development on Groundwater Recharge through a Deep Vadose Zone

1
Grounded in Water, 2/490 Portrush Rd, St Georges, Adelaide 5064, Australia
2
CDM Smith, Level 2, 238 Angas Street, Adelaide, SA 5000, Australia
*
Author to whom correspondence should be addressed.
Water 2020, 12(4), 936; https://doi.org/10.3390/w12040936
Received: 2 March 2020 / Revised: 23 March 2020 / Accepted: 24 March 2020 / Published: 26 March 2020
(This article belongs to the Special Issue Rainfall Infiltration Modeling)
Water use measures are being implemented in irrigation areas to make better use of limited water resources and reduce adverse environmental impacts. A semi-analytical model is developed and tested with a numerical model to estimate changes in timing and magnitude of recharge from such measures in irrigation areas to support management of impacts, especially for areas with deep vadose zones and perched water tables. Low hydraulic conductivity of soil layers will lengthen time delays between actions and changes to recharge in addition to limiting the maximum recharge. Despite variations in detailed processes, the recharge outputs from models are surprisingly similar, irrespective of whether lateral effects are major. Superposition may be used to simplify the modelling of the total change in recharge from successive actions, including the initial development. Further simplification is possible, using an exponential conceptual model to approximate recharge responses to individual actions. View Full-Text
Keywords: hydrology; recharge; soil drainage; water use efficiency; perched water hydrology; recharge; soil drainage; water use efficiency; perched water
Show Figures

Figure 1

MDPI and ACS Style

Walker, G.R.; Currie, D.; Smith, T. Modelling the Effect of Efficiency Measures and Increased Irrigation Development on Groundwater Recharge through a Deep Vadose Zone. Water 2020, 12, 936.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop