Specific Capacity of Open Well Solution

STEP 0: Pre-Calculation Summary
Formula Used
Specific Capacity = (1/Time)*log((Depression Head 1/Depression Head 2),e)
KA = (1/t)*log((h1/h2),e)
This formula uses 1 Constants, 1 Functions, 4 Variables
Constants Used
e - Napier's constant Value Taken As 2.71828182845904523536028747135266249
Functions Used
log - Logarithmic function is an inverse function to exponentiation., log(Base, Number)
Variables Used
Specific Capacity - (Measured in Meter per Second) - Specific Capacity of an open well.
Time - (Measured in Second) - Time can be defined as the ongoing and continuous sequence of events that occur in succession, from the past through the present to the future.
Depression Head 1 - (Measured in Meter) - Depression Head 1 is the difference of level of waters table and the water level in the well when pumping stopped.
Depression Head 2 - (Measured in Meter) - Depression Head 2 is the difference of level of waters table and the water level in the well when pumping stopped.
STEP 1: Convert Input(s) to Base Unit
Time: 4 Hour --> 14400 Second (Check conversion here)
Depression Head 1: 27 Meter --> 27 Meter No Conversion Required
Depression Head 2: 10 Meter --> 10 Meter No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
KA = (1/t)*log((h1/h2),e) --> (1/14400)*log((27/10),e)
Evaluating ... ...
KA = 6.99162552048376E-05
STEP 3: Convert Result to Output's Unit
6.99162552048376E-05 Meter per Second -->0.251698518737415 Meter per Hour (Check conversion here)
FINAL ANSWER
0.251698518737415 0.251699 Meter per Hour <-- Specific Capacity
(Calculation completed in 00.004 seconds)

Credits

Created by Suraj Kumar
Birsa Institute of Technology (BIT), Sindri
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4 Specific Capacity Calculators

Specific Capacity of Open Well
Go Specific Capacity = (1/Time)*log((Depression Head 1/Depression Head 2),e)
Specific Capacity of Open Well with Base 10
Go Specific Capacity = (2.303/Time)*log((Depression Head 1/Depression Head 2),10)
Specific Capacity given Discharge from Well
Go Specific Capacity = Discharge/(Cross-Sectional Area*Constant Depression Head)
Specific Capacity of open Well given Constant Depending upon Soil at Base
Go Specific Capacity = Constant/Cross-Sectional Area

Specific Capacity of Open Well Formula

Specific Capacity = (1/Time)*log((Depression Head 1/Depression Head 2),e)
KA = (1/t)*log((h1/h2),e)

What is specific capacity ?

Specific capacity is a quantity that which a water well can produce per unit of drawdown. It is normally obtained from a step drawdown test.

How to Calculate Specific Capacity of Open Well?

Specific Capacity of Open Well calculator uses Specific Capacity = (1/Time)*log((Depression Head 1/Depression Head 2),e) to calculate the Specific Capacity, The Specific Capacity of Open Well calculates value of specific capacity of open well when we have prior information of other parameters used. Specific Capacity is denoted by KA symbol.

How to calculate Specific Capacity of Open Well using this online calculator? To use this online calculator for Specific Capacity of Open Well, enter Time (t), Depression Head 1 (h1) & Depression Head 2 (h2) and hit the calculate button. Here is how the Specific Capacity of Open Well calculation can be explained with given input values -> 906.1147 = (1/14400)*log((27/10),e).

FAQ

What is Specific Capacity of Open Well?
The Specific Capacity of Open Well calculates value of specific capacity of open well when we have prior information of other parameters used and is represented as KA = (1/t)*log((h1/h2),e) or Specific Capacity = (1/Time)*log((Depression Head 1/Depression Head 2),e). Time can be defined as the ongoing and continuous sequence of events that occur in succession, from the past through the present to the future, Depression Head 1 is the difference of level of waters table and the water level in the well when pumping stopped & Depression Head 2 is the difference of level of waters table and the water level in the well when pumping stopped.
How to calculate Specific Capacity of Open Well?
The Specific Capacity of Open Well calculates value of specific capacity of open well when we have prior information of other parameters used is calculated using Specific Capacity = (1/Time)*log((Depression Head 1/Depression Head 2),e). To calculate Specific Capacity of Open Well, you need Time (t), Depression Head 1 (h1) & Depression Head 2 (h2). With our tool, you need to enter the respective value for Time, Depression Head 1 & Depression Head 2 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 Specific Capacity?
In this formula, Specific Capacity uses Time, Depression Head 1 & Depression Head 2. We can use 3 other way(s) to calculate the same, which is/are as follows -
  • Specific Capacity = Constant/Cross-Sectional Area
  • Specific Capacity = (2.303/Time)*log((Depression Head 1/Depression Head 2),10)
  • Specific Capacity = Discharge/(Cross-Sectional Area*Constant Depression Head)
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