0022-1694/$ see front matter 2011 Elsevier B.V. A doi:10.1016/j.jhydrol.2011.03.044 ⇑ Corresponding author. Tel.: +1 208 426 4678; fax E-mail addresses: [email protected] boisestate.edu (W. Barrash), michaelthoma@boisestat mtech.edu (B. Malama). A recently developed unified model for partially-penetrating slug tests in unconfined aquifers (Malama et al., in press) provides a semi-an...

A new method is presented for the simultaneous estimation of original hydrocarbons in place OHIP and aquifer parameters for a circular aquifer surrounding a hydrocarbon reservoir. Water influx data are represented by the van-Everdingen and Hurst (VEH) unsteady state solution. In addition to the initial oil and/or gas in place, the aquifer parameters are also estimated. These parameters include ...

the gas-assisted gravity drainage (gagd) process is designed and practiced based on gravitydrainage idea and uses the advantage of density difference between injected co2 and reservoir oil.in this work, one of iran western oilfields was selected as a case study and a sector model wassimulated based on its rock and fluid properties. the pressure of co2 gas injection was close to themmp of the oi...

Introduction Groundwater supply sustainable yield is herein defined as how much water can be withdrawn from an aquifer system, where and for how long, with acceptable physical, economical, environmental, social, cultural, institutional, and legal consequences. The purpose of this Technical Commentary is to focus on the following technical aspects of groundwater supply sustainable yield that are...

The present study implements a stochastic optimization technique to optimally manage freshwater pumping from coastal aquifers. Our simulations utilize the well-known sharp interface model for saltwater intrusion in coastal aquifers together with its known analytical solution. The objective is to maximize the total volume of freshwater pumped by the wells from the aquifer while, at the same time...

In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: Keywords: Coastal aquifer Tidal fluctuation Two-zone aquifer Zone-contrast parameter Groundwater head fluctuation s u m m a ...

High-nitrogen loadings of rivers and aquifers systems are a major concern because of potential effects on human health and water quality impacts such as eutrophication of lakes and coastal zones. This nitrogen enrichment is commonly attributed to anthropogenic sources such as sewage and agricultural and industrial wastes. The aims of this study were to delineate spatial distribution of groundwa...

this paper presents an analytical model characterizing unsteady groundwater flow in an unconfined aquifer resting on a sloping impervious bed. the aquifer is in contact with a constant water level at one end. the other end is connected to a stream whose level is increasing form an initial level to a final level at a known exponentially decaying function of time. moreover, the aquifer is repleni...

The impact of ground water pumping on nearby streams is often estimated using analytic models of the interconnected stream-aquifer system. A common assumption of these models is that the pumped aquifer is underlain by an impermeable formation. A new semianalytic solution for drawdown and stream depletion has been developed that does not require this assumption. This solution shows that pumping-...