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Modelling Groundwater Returns to Streams From Irrigation Areas with Perched Water Tables
- Source :
- Water, Vol 12, Iss 956, p 956 (2020), Water, Volume 12, Issue 4
- Publication Year :
- 2020
- Publisher :
- MDPI AG, 2020.
-
Abstract
- Quantifying the magnitude and timing of groundwater returns to streams from irrigation is important for the management of natural resources in irrigation districts where the quantity or quality of surface water can be affected. Deep vadose zones and perched water tables can complicate the modelling of these fluxes, and model outputs may be biased if these factors are misrepresented or ignored. This study was undertaken in the Murray Basin in southern Australia to develop and test an integrated modelling method that links irrigation activity to surface water impacts by accounting for all key hydrological processes, including perching and vadose zone transmission. The method incorporates an agronomic water balance to simulate root zone processes, semi-analytical transfer functions to simulate the deeper vadose zone, and an existing numerical groundwater model to simulate irrigation returns to the Murray River and inform the management of river salinity. The integrated modelling can be calibrated by various means, depending on context, and has been shown to be beneficial for management purposes without introducing an unnecessary level of complexity to traditional modelling workflows. Its applicability to other irrigation settings is discussed.
- Subjects :
- Hydrology
Irrigation
lcsh:TD201-500
lcsh:Hydraulic engineering
Water table
Geography, Planning and Development
irrigation recharge
hydrology
groundwater returns to streams
Aquatic Science
Biochemistry
Water balance
perched water tables
Hydrology (agriculture)
lcsh:Water supply for domestic and industrial purposes
lcsh:TC1-978
Vadose zone
Environmental science
vadose zone modelling
groundwater modelling
Groundwater model
Surface water
Groundwater
Water Science and Technology
Subjects
Details
- Language :
- English
- ISSN :
- 20734441
- Volume :
- 12
- Issue :
- 956
- Database :
- OpenAIRE
- Journal :
- Water
- Accession number :
- edsair.doi.dedup.....b23e4b4d6cd86a54a09c6e9b41e02fae