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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, S s {\displaystyle S_{s}} [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.
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 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;
Current Yield – But now consider how yield changes if the price of that same bond falls. If the bond mentioned above is resold for $800 it results in a current yield of 6.25%.
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
High-yield savings account vs. CD (sarayut Thaneerat via Getty Images) Savings rates continue to decline following the Federal Reserve's three back-to-back rate cuts of 2024.
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*It depends on the bank. Money market account vs. CD. A money market account differs from a CD in that the money market account has checking account features.