Mithila Muthamma PA
Coorg Institute of Technology (CIT), Coorg
Mithila Muthamma PA has created this Calculator and 500+ more calculators!
Chandana P Dev
NSS College of Engineering (NSSCE), Palakkad
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11 Other formulas that you can solve using the same Inputs

Time at which Steady-Shape Conditions Develop
time at which steady-shape conditions develop=(7200*Distance from Pumping Well to Observation Well^2*Storage Coefficient)/Transmissivity GO
Storage Coefficient when Time at which Steady-Shape Conditions Develop is Given
Storage Coefficient=Transmissivity*time at which steady-shape conditions develop/7200*Distance from Pumping Well to Observation Well^2 GO
Transmissivity when Time at which Steady-Shape Conditions Develop is Given
Transmissivity=7200*Distance from Pumping Well to Observation Well^2*Storage Coefficient/time at which steady-shape conditions develop GO
Storage Coefficient from the Time-Drawdown Graphs
Storage Coefficient=(2.25*Transmissivity*Time at the Point of Intersection )/Distance from Pumping Well to Observation Well^2 GO
Transmissivity When Storage Coefficient is Given from Theis Equation
Transmissivity=(Storage Coefficient*Distance from Pumping Well to Observation Well^2)/(4*Time*Varying Dimensionless Group ) GO
Equation for the Varying Dimensionless Group u in Theis Equation
Varying Dimensionless Group =(Distance from Pumping Well to Observation Well^2*Storage Coefficient)/4*Transmissivity*Time GO
Theis Equation to Determine Storage Coefficient
Storage Coefficient=(4*Transmissivity*Time*Varying Dimensionless Group )/Distance from Pumping Well to Observation Well^2 GO
Equation for Pumping Rate when Transmissivity derived from the Time-Drawdown Graphs is Given
Pumping Rate=(Transmissivity*4*pi*Drawdown Across One Log Cycle)/Pumping Rate GO
Quantity of Water when Transmissivity is Given
Quantity of water=Transmissivity*Large Width of Aquifer*Hydraulic Gradient GO
Storage Coefficient From Theis Equation of Transmissivity
Storage Coefficient=(Pumping Rate*Well Function of u)/Transmissivity*4*pi GO
Thickness of Aquifer when Transmissivity is Given
Aquifer Thickness at Midpoint =Transmissivity/Hydraulic Conductivity GO

7 Other formulas that calculate the same Output

Storage Coefficient when Time at which Steady-Shape Conditions Develop is Given
Storage Coefficient=Transmissivity*time at which steady-shape conditions develop/7200*Distance from Pumping Well to Observation Well^2 GO
Storage Coefficient from Distance-Drawdown Graphs
Storage Coefficient=2.25*Transmissivity*Time at which the Drawdowns were Measured/Distance from Pumping Well to Point Intersection^2 GO
Storage Coefficient for Inconsistent Units from Distance-Drawdown Graphs
Storage Coefficient=Transmissivity*Time at which the Drawdowns were Measured/640*Distance from Pumping Well to Point Intersection^2 GO
Storage Coefficient from the Time-Drawdown Graphs
Storage Coefficient=(2.25*Transmissivity*Time at the Point of Intersection )/Distance from Pumping Well to Observation Well^2 GO
Theis Equation to Determine Storage Coefficient
Storage Coefficient=(4*Transmissivity*Time*Varying Dimensionless Group )/Distance from Pumping Well to Observation Well^2 GO
Storage Coefficient when Distance from Pumping Well is Given
Storage Coefficient=2.25*Transmissivity*Time/Distance from Pumping Well to Point Intersection^2 GO
Storage Coefficient From Theis Equation of Transmissivity
Storage Coefficient=(Pumping Rate*Well Function of u)/Transmissivity*4*pi GO

Modified Equation for Storage Coefficient from Time-Drawdown Graphs Formula

Storage Coefficient=(Transmissivity*Time at the Point of Intersection )/640*Distance from Pumping Well to Observation Well^2
S=(T*t<sub>o</sub>)/640*r^2
More formulas
Time at which Steady-Shape Conditions Develop GO
Transmissivity when Time at which Steady-Shape Conditions Develop is Given GO
Storage Coefficient when Time at which Steady-Shape Conditions Develop is Given GO
Transmissivity Derived from the Time-Drawdown Graphs GO
Storage Coefficient from the Time-Drawdown Graphs GO
Equation for Pumping Rate when Transmissivity derived from the Time-Drawdown Graphs is Given GO
Equation for Drawdown Across One Log Cycle when Transmissivity is Given GO
Distance from the Pumping Well to the Observation Well when Storage Coefficient is Given GO
Modified Equation for Transmissivity from Time-Drawdown Graphs GO

What is Storativity?

Storativity or the Storage Coefficient is the volume of water released from storage per unit decline in hydraulic head in the aquifer, per unit area of the aquifer. Storativity is a dimensionless quantity, and is always greater than 0.

How to Calculate Modified Equation for Storage Coefficient from Time-Drawdown Graphs?

Modified Equation for Storage Coefficient from Time-Drawdown Graphs calculator uses Storage Coefficient=(Transmissivity*Time at the Point of Intersection )/640*Distance from Pumping Well to Observation Well^2 to calculate the Storage Coefficient, The Modified Equation for Storage Coefficient from Time-Drawdown Graphs is the the volume of water that can be removed from an aquifer for a given drop in hydraulic head. Storage Coefficient and is denoted by S symbol.

How to calculate Modified Equation for Storage Coefficient from Time-Drawdown Graphs using this online calculator? To use this online calculator for Modified Equation for Storage Coefficient from Time-Drawdown Graphs, enter Transmissivity (T), Time at the Point of Intersection (to) and Distance from Pumping Well to Observation Well (r) and hit the calculate button. Here is how the Modified Equation for Storage Coefficient from Time-Drawdown Graphs calculation can be explained with given input values -> 0.125 = (0.00277777777777778*7200)/640*2^2.

FAQ

What is Modified Equation for Storage Coefficient from Time-Drawdown Graphs?
The Modified Equation for Storage Coefficient from Time-Drawdown Graphs is the the volume of water that can be removed from an aquifer for a given drop in hydraulic head and is represented as S=(T*to)/640*r^2 or Storage Coefficient=(Transmissivity*Time at the Point of Intersection )/640*Distance from Pumping Well to Observation Well^2. Transmissivity is the rate at which groundwater flows horizontally through an aquifer, Time at the Point of Intersection between Straight Line and Zero-drawdown Line and Distance from Pumping Well to Observation Well.
How to calculate Modified Equation for Storage Coefficient from Time-Drawdown Graphs?
The Modified Equation for Storage Coefficient from Time-Drawdown Graphs is the the volume of water that can be removed from an aquifer for a given drop in hydraulic head is calculated using Storage Coefficient=(Transmissivity*Time at the Point of Intersection )/640*Distance from Pumping Well to Observation Well^2. To calculate Modified Equation for Storage Coefficient from Time-Drawdown Graphs, you need Transmissivity (T), Time at the Point of Intersection (to) and Distance from Pumping Well to Observation Well (r). With our tool, you need to enter the respective value for Transmissivity, Time at the Point of Intersection and Distance from Pumping Well to Observation Well and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Storage Coefficient?
In this formula, Storage Coefficient uses Transmissivity, Time at the Point of Intersection and Distance from Pumping Well to Observation Well. We can use 7 other way(s) to calculate the same, which is/are as follows -
  • Storage Coefficient=(4*Transmissivity*Time*Varying Dimensionless Group )/Distance from Pumping Well to Observation Well^2
  • Storage Coefficient=(Pumping Rate*Well Function of u)/Transmissivity*4*pi
  • Storage Coefficient=Transmissivity*time at which steady-shape conditions develop/7200*Distance from Pumping Well to Observation Well^2
  • Storage Coefficient=(2.25*Transmissivity*Time at the Point of Intersection )/Distance from Pumping Well to Observation Well^2
  • Storage Coefficient=2.25*Transmissivity*Time at which the Drawdowns were Measured/Distance from Pumping Well to Point Intersection^2
  • Storage Coefficient=Transmissivity*Time at which the Drawdowns were Measured/640*Distance from Pumping Well to Point Intersection^2
  • Storage Coefficient=2.25*Transmissivity*Time/Distance from Pumping Well to Point Intersection^2
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