Border Irrigation Field Experiment. II: Salt Transport

Gilfedder, Mat; Mein, Russell G; Connell, Luke D.

doi:10.1061/(asce)0733-9437(2000)126:2(92)

Cited by 12 publications

(10 citation statements)

References 9 publications

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“…Salinity of surface runoff was measured during an intensive field sampling programme in 1980–1981, with a total of 305 samples analysed for the study catchment (Gutteridge, Haskins & Davey Pty Ltd, 1985, p. 22). Average salinity of surface runoff from study by Gutteridge, Haskins & Davey Pty Ltd (1985) was also consistent with measurements taken by Gilfedder et al (2000b) in the study catchment…”

Section: Methodssupporting

confidence: 89%

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Understanding salt mobilization from an irrigated catchment in south‐eastern Australia

Selle¹,

Thayalakumaran²,

Morris³

2010

Hydrological Processes

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Abstract:Groundwater discharge from the Riverine Plains of the southern Murray-Darling Basin is a major process contributing salt to the Murray River in Australia. In this study, data from an irrigated 60 000 ha catchment in the Riverine Plains were analysed to understand groundwater discharge into deeply incised drains, the process dominating salt mobilization from the catchment. We applied three integrated methodologies: classification and regression trees (CART), conceptual modelling and artificial neural networks (ANNs) to a comprehensive, spatially lumped, monthly data set from July 1975 to December 2004. Using CART analysis, it was shown that rainfall was the most important variable consistently explaining the salt load patterns at the catchment outlet. Using the conceptual model representing spatially lumped groundwater discharge into deeply incised drains, we demonstrated that salt mobilization from the study catchment can be well represented by a rainfall contribution, influenced by the hydraulic head in the deep regional aquifer and potential evapotranspiration. Using ANNs, it was confirmed that rainfall had a much higher impact on salt loads at the catchment outlet than irrigation water use. All these results demonstrate that under conditions similar to those experienced from 1975 to 2004, it is rainfall rather than irrigation water use that governs salt mobilization from the study catchment. Management of salt mobilization from irrigated catchments has traditionally focussed on the improvement of irrigation practices but it could be equally important to further understand the scope for management to control groundwater discharge in these irrigation areas.

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Section: Methodssupporting

confidence: 89%

“…Previous process studies in the study catchment were at the scale of an irrigation bay (Gilfedder et al , 2000a, 2000b) and at a sub‐catchment scale (Connell et al , 2001). The study by Gutteridge, Haskins & Davey Pty Ltd (1985) developed a model of flow and salinity for the whole study catchment.…”

Section: Methodsmentioning

confidence: 99%

Understanding salt mobilization from an irrigated catchment in south‐eastern Australia

Selle¹,

Thayalakumaran²,

Morris³

2010

Hydrological Processes

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“…The second activity involved the use of the calibrated Table 2. There is also a marked distribution in salinity; near the drain, surface salinities are high relative to the rest of the bay, and the combined effects of salt and waterlogging have affected vegetation. The spatial and vertical distribution of soil electrical conductivity was measured using a combination of EM34 and soil sampling and this information is presented by Gilfedder et al [2000b].…”

Section: Overview Of Methodologymentioning

confidence: 99%

“…The objective of these two papers is to develop a model for catchment flow and solute transport that attempts to preserve the scale at which flow processes operate but that overcomes some of the difficulties of spatially distributed models. In this first paper a model for flow and transport within hillslopes transects is presented and tested against observations from a field experiment conducted on an irrigation bay [described by Gilfedder et al [2000aGilfedder et al [ , 2000b. In the second paper [Connell et al, this issue] this hillslope model forms the fundamental unit in a catchment application.…”

Section: •Now At Department Of Geological Sciences University Collegementioning

confidence: 99%

“…Gilham [1984] attributed this behavior to the small soil moisture deficits within the capillary fringe that can extend to the surface if the water table is shallow. Wash-off of surface precipitated salt and diffusion of subsurface salt into overland flow can also be a significant source of salt for surface waters [Gilfedder et al, 2000b].…”

Section: •Now At Department Of Geological Sciences University Collegementioning

confidence: 99%

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Modeling flow and transport in irrigation catchments: 1. Development and testing of subcatchment model

Connell¹,

Jayatilaka²,

Gilfedder³

et al. 2001

Water Resources Research

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Origin and dynamics of groundwater salinity in the alluvial plains of western Delhi and adjacent territories of Haryana State, India

Lorenzen

Sprenger

Baudron

et al. 2011

Hydrological Processes

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Abstract:Groundwater salinity is a widespread problem and a challenge to water resources management. It is an increasing concern in the alluvial plains of Delhi and neighbouring Haryana state as well as a risk for agricultural production water supply and sustainable development. This study aims to identify potential sources of dissolved salts and the driving mechanisms of salinity ingress in the shallow aquifer. It combines a comprehensive review of environmental conditions and the analysis of groundwater samples from 25 sampling points. Major ions are analysed to describe the composition and distribution of saline groundwater and dissolution/ precipitation dynamics. Density stratification and local upconing of saline waters were identified by multilevel monitoring and temperature logging. Bromide-chloride ratios hold information on the formation of saline waters, and nitrate is used as an indicator for anthropogenic influences. In addition, stable isotope analysis helps to identify evaporation and to better understand recharge processes and mixing dynamics in the study region. The results lead to the conclusion that surface water and groundwater influx into the poorly drained semiarid basin naturally results in the accumulation of salts in soil, sediments and groundwater. Human-induced changes of environmental conditions, especially the implementation of traditional canal and modern groundwater irrigation, have augmented evapotranspiration and led to waterlogging in large areas. In addition, water-level fluctuations and perturbation of the natural hydraulic equilibrium favour the mobilisation of salts from salt stores in the unsaturated zone and deeper aquifer sections. The holistic approach of this study demonstrates the importance of various salinity mechanisms and provides new insights into the interference of natural and anthropogenic influences.

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Border Irrigation Field Experiment. II: Salt Transport

Cited by 12 publications

References 9 publications

Understanding salt mobilization from an irrigated catchment in south‐eastern Australia

Understanding salt mobilization from an irrigated catchment in south‐eastern Australia

Modeling flow and transport in irrigation catchments: 1. Development and testing of subcatchment model

Origin and dynamics of groundwater salinity in the alluvial plains of western Delhi and adjacent territories of Haryana State, India

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