Groundwater flow system

Irrigation using surface and ground water in this region has substantially altered the physical and chemical nature of the groundwater flow system and Anally the total biogeochemical food web. 

Goodfellow 2003 Gilliss et al. 2004). Interpretation of hydrology is simplified in regions dominated by porous flow in unconfined aquifers, and significantly more complicated where flow is fracture-dominated, or where significant density contrasts between different groundwater flow systems exist (Carey et al. 2003). 

Further classification of lakes relates to their position within the regional groundwater-flow system. Terminal-lake systems are defined as lakes that function as the discharge point of the regional groundwater-flow system. For terminal lakes, water is removed by evaporation and sometimes through surface outflow. These lakes typically evolve into saline lake systems characteristic of the semiarid or arid regions of the world (32). 

Forster C, Smith L (1988b) Groundwater flow systems in mountainous terrain. 2. Controlling factors. Water Resour Res 24(7) 1011-1023... 

Advection is the transport of dissolved contaminant mass due to the bulk flow of groundwater, and is by far the most dominant mass transport process [2]. Thus, if one understands the groundwater flow system, one can predict how advection will transport dissolved contaminant mass. The speed and direction of groundwater flow may be characterized by the average linear velocity vector (v). The average linear velocity of a fluid flowing in a porous medium is determined using Darcy s Law [2] ... 

Hamlin H. S. (1988) Depositional and groundwater flow systems of the Carrizo-Upper Wilcox, South Texas. Texas Bureau of Economic Geology, Report of Investigations 175, Austin. 

The main large-scale groundwater flow systems that may develop during the different stages of evolution of a sedimentary basin are described in Sections 2.1 to 2.3. These sections also present some examples of the relation between a basin type and type of groundwater flow system. Section 2.4 gives an overview of local groundwater flow systems of interest in petroleum-related studies. 

When the characteristics of a groundwater flow system are adjusted to the prevailing boundary conditions and remain constant in a sedimentary basin during a certain period, the groundwater flow system is said to be in steady state. Different groundwater flow systems may coexist and interact in the same... 

Lateral variations in permeability, caused by e.g. facies changes unconformities, faults, can profoundly affect the gravity-induced groundwater flow system (Figure 2.24), which in some cases can lead to the creation of local flow systems (Garven and Freeze, 1984b). 

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