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S-Curve Addition Formula

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S-Curve Addition is a method or concept related to the analysis and interpretation of pumping test data and used for the construction of S-curve. Check FAQs
StD=St-Ut
StD - S-Curve Addition?St - S-Curve at Time 't'?Ut - Ordinates of Unit Hydrograph?

S-Curve Addition Example

With values
With units
Only example

Here is how the S-Curve Addition equation looks like with Values.

Here is how the S-Curve Addition equation looks like with Units.

Here is how the S-Curve Addition equation looks like.

24Edit=28Edit-4Edit
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S-Curve Addition Solution

Follow our step by step solution on how to calculate S-Curve Addition?

FIRST Step Consider the formula
StD=St-Ut
Next Step Substitute values of Variables
∴ StD=28h-4h
Next Step Prepare to Evaluate
∴ StD=28-4
Next Step Evaluate
∴StD=86400s
LAST Step Convert to Output's Unit
∴StD=24h

S-Curve Addition Formula Elements

Variables
S-Curve Addition
S-Curve Addition is a method or concept related to the analysis and interpretation of pumping test data and used for the construction of S-curve.
Symbol: StD
Measurement: TimeUnit: h
Note: Value can be positive or negative.
Formulas to find S-Curve AdditionOpen Variable
S-Curve at Time 't'
S-Curve at Time 't' is the cumulative drawdown or recovery of groundwater levels over a period, typically due to pumping from wells or injection activities.
Symbol: St
Measurement: TimeUnit: h
Note: Value can be positive or negative.
Formulas to find S-Curve at Time 't'Open Variable
Ordinates of Unit Hydrograph
Ordinates of Unit Hydrograph is the runoff discharge values over time after a unit input of effective rainfall. These values typically show how runoff responds and peaks after a storm event.
Symbol: Ut
Measurement: TimeUnit: h
Note: Value can be positive or negative.
Formulas to find Ordinates of Unit HydrographOpen Variable

Other formulas in The S Curve category

​Go S Curve at any time
St=Ut+StD
​Go Ordinates of Unit Hydrograph for S-Curve at Certain Time
Ut=St-StD
​Go Equilibrium Discharge from S Curve
Qs=(ATer)⋅104
​Go Maximum Rate of Discharge from S-Curve
Qs=2.778⋅ADr

How to Evaluate S-Curve Addition?

S-Curve Addition evaluator uses S-Curve Addition = S-Curve at Time 't'-Ordinates of Unit Hydrograph to evaluate the S-Curve Addition, The S-Curve Addition formula is defined as the summation of the ordinate of the D-h Unit hydrograph at time 't' equalizes the ordinate of the S-curve at any time t. S-Curve Addition is denoted by StD symbol.

How to evaluate S-Curve Addition using this online evaluator? To use this online evaluator for S-Curve Addition, enter S-Curve at Time 't' (St) & Ordinates of Unit Hydrograph (Ut) and hit the calculate button.

FAQs on S-Curve Addition

What is the formula to find S-Curve Addition?
The formula of S-Curve Addition is expressed as S-Curve Addition = S-Curve at Time 't'-Ordinates of Unit Hydrograph. Here is an example- 0.006667 = 100800-14400.
How to calculate S-Curve Addition?
With S-Curve at Time 't' (St) & Ordinates of Unit Hydrograph (Ut) we can find S-Curve Addition using the formula - S-Curve Addition = S-Curve at Time 't'-Ordinates of Unit Hydrograph.
Can the S-Curve Addition be negative?
Yes, the S-Curve Addition, measured in Time can be negative.
Which unit is used to measure S-Curve Addition?
S-Curve Addition is usually measured using the Hour[h] for Time. Second[h], Millisecond[h], Microsecond[h] are the few other units in which S-Curve Addition can be measured.
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