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These properties are storativity (S), specific storage (S s) and specific yield (S y). According to Groundwater, by Freeze and Cherry (1979), specific storage, [m −1], of a saturated aquifer is defined as the volume of water that a unit volume of the aquifer releases from storage under a unit decline in hydraulic head. [1]
The fraction of water held back in the aquifer is known as specific retention. Thus it can be said that porosity is the sum of specific yield and specific retention. Specific yield of soils differ from each other in the sense that some soil types have strong molecular attraction with the water held in their pores while others have less.
Specific storage, specific yield, and specific capacity, quantify the capacity of an aquifer to release groundwater from storage per unit decline in hydraulic head pressure; Specific strength, material strength (pressure required at failure) per unit material density; Specific surface area, per unit of mass, volume, or cross-sectional area
Specific storage or storativity: a measure of the amount of water a confined aquifer will give up for a certain change in head; Transmissivity The rate at which water is transmitted through whole thickness and unit width of an aquifer under a unit hydraulic gradient. It is equal to the hydraulic conductivity times the thickness of an aquifer;
A CD is a deposit account that usually pays a fixed annual percentage yield ... Unlike bonds, a CD’s fixed term is guaranteed to pay a specific yield on a set date in the future.
Jimmy Carter’s grandson said the former president is “not that active” these days, but he’s still “stubborn” after spending nearly two years in hospice.
Dividing through by the specific storage (S s), puts hydraulic diffusivity (α = K/S s or equivalently, α = T/S) on the right hand side. The hydraulic diffusivity is proportional to the speed at which a finite pressure pulse will propagate through the system (large values of α lead to fast propagation of signals). The groundwater flow ...
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