GEO3510 Water Resources
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12 Terms
Porosity
Percentage of total volume of rock or sediment that consists of pore spaces
Permeability
The ability of a material to transmit a fluid
Porosity and permeability are…
not the same
Pore size help…
determine permeability
The larger the pores are for the same porosity…
the greater the permeability will be
Aquifer
Permeable rock strata or sediment that transmits groundwater freely (such as sands and gravels)
Aquitard
A relatively impermeable layer that hinders water movement (such as clay)
The water table
The level at which the soil or rock is saturated with water
The water table migrates..
higher- during the rainy season
Lower-in the dry season
A problem in water supply for the Eastern US is
surface water rights typically assigned according to the riparian system
A problem in water supply for the Western US is
Surface water rights often follow “prior appropriation”rules. First come, first serve
Subsidence
The ground sinks when water is pumped from wells faster than natural recharge processes can replace it