Groundwater dating by estimation of groundwater flow velocity and dissolved 4He accumulation rate calibrated by 36Cl in the Great Artesian Basin, Australia
نویسندگان
چکیده
منابع مشابه
Field estimates of groundwater discharge – Great Artesian Basin, South Australia
Understanding the water balance of large groundwater systems is fundamental for the sustainable management of the resource. However, measuring many of the major components of the water balance pose considerable challenges and are thus estimated through modelling. A shortcoming of the modelling approach is that the water balance may have high bias and uncertainty due to insufficient information....
متن کاملQuantifying near-surface, diffuse groundwater discharge along the south-west margin of the Great Artesian Basin
Few field measurements are available to constrain the diffuse discharge (or vertical leakage) component of the water balance of the Great Artesian Basin (GAB), even though numerical modelling indicates that it accounts for over half of the outflow of the GAB in South Australia. High leakage rates are observed along the southwestern margin of the GAB where the aquifer is close to the surface wit...
متن کاملGroundwater Age and Groundwater Age Dating
A new way of thinking about groundwater age is changing the field of groundwater age dating. Following a rigorous definition of age, a groundwater sample is seen not as water that recharged the flow regime at a point in the past, but as a mixture of waters that have resided in the subsurface for varying lengths of time. This recognition resolves longstanding inconsistencies encountered in age d...
متن کاملFramework for incorporating spectral observations into steady state analysis of groundwater discharge around the margins of the Great Artesian Basin
Diffuse groundwater discharge (also known as vertical leakage) forms an important and poorly constrained component of the water balance of the Great Artesian Basin (GAB), Australia’s largest groundwater resource. Around the south-western margin of the GAB, the diffuse leakage from the artesian aquifer discharges into the unconfined water table and subsequently into the atmosphere via evapotrans...
متن کاملInverse groundwater modelling in the Willunga Basin, South Australia
A new inverse technique for modelling groundwater flow, based on a functional minimization technique, has been used to calibrate a groundwater flow model of a subregion of the Port Willunga aquifer within the Willunga Basin in South Australia. The Willunga Basin is the location of extensive viticulture, irrigated primarily by groundwater, the levels and quality of which have declined significan...
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ژورنال
عنوان ژورنال: Earth and Planetary Science Letters
سال: 2009
ISSN: 0012-821X
DOI: 10.1016/j.epsl.2009.07.034