Daily Runoff in Smaller Catchments under SCS Solution

STEP 0: Pre-Calculation Summary
Formula Used
Direct Surface Runoff = (Total Precipitation-0.2*Potential Maximum Retention)^2/(Total Precipitation+0.8*Potential Maximum Retention)
Q = (PT-0.2*S)^2/(PT+0.8*S)
This formula uses 3 Variables
Variables Used
Direct Surface Runoff - (Measured in Cubic Meter) - Direct Surface Runoff is the rain or meltwater that runs off during the rain or melt event as overland flow or in the vegetation cover above frozen soil.
Total Precipitation - (Measured in Cubic Meter) - Total Precipitation is the sum of rainfall and the assumed water equivalent of snowfall for a given year.
Potential Maximum Retention - (Measured in Cubic Meter) - The potential maximum retention mainly represents infiltration occurring after runoff has started.
STEP 1: Convert Input(s) to Base Unit
Total Precipitation: 16 Cubic Meter --> 16 Cubic Meter No Conversion Required
Potential Maximum Retention: 2.5 Cubic Meter --> 2.5 Cubic Meter No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Q = (PT-0.2*S)^2/(PT+0.8*S) --> (16-0.2*2.5)^2/(16+0.8*2.5)
Evaluating ... ...
Q = 13.3472222222222
STEP 3: Convert Result to Output's Unit
13.3472222222222 Cubic Meter --> No Conversion Required
FINAL ANSWER
13.3472222222222 13.34722 Cubic Meter <-- Direct Surface Runoff
(Calculation completed in 00.004 seconds)

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Coorg Institute of Technology (CIT), Coorg
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SSC CN Equation for Indian Conditions Calculators

Daily Runoff for Black Soils Type I and Soil having AMC of Type I, II and III for Indian Conditions
​ LaTeX ​ Go Direct Surface Runoff = (Total Precipitation-0.3*Potential Maximum Retention)^2/(Total Precipitation+0.7*Potential Maximum Retention)
Daily Runoff valid for Black Soils under AMC of type I and II for Indian Conditions
​ LaTeX ​ Go Direct Surface Runoff = (Total Precipitation-0.1*Potential Maximum Retention)^2/(Total Precipitation+0.9*Potential Maximum Retention)
Daily Runoff in Smaller Catchments under SCS
​ LaTeX ​ Go Direct Surface Runoff = (Total Precipitation-0.2*Potential Maximum Retention)^2/(Total Precipitation+0.8*Potential Maximum Retention)

Daily Runoff in Smaller Catchments under SCS Formula

​LaTeX ​Go
Direct Surface Runoff = (Total Precipitation-0.2*Potential Maximum Retention)^2/(Total Precipitation+0.8*Potential Maximum Retention)
Q = (PT-0.2*S)^2/(PT+0.8*S)

What is Runoff Curve Number?

The Runoff curve number is an empirical parameter used in hydrology for predicting direct runoff or infiltration from rainfall excess. The curve number is based on the area's hydrologic soil group, land use, treatment and hydrologic condition.

What is Curve Number and on what factors it depends?

The Curve Number (CN) is a dimensionless parameter related to the potential maximum retention expressed in millimeters. It ranges from 0-100. A CN value of 100 represents a condition of zero potential retention and CN= 0 represents an infinitely abstracting catchment with S= ∞.
The Curve Number CN depends upon the following listed below
1. Soil Type
2. Land Use/Cover
3. Antecedent moisture condition

How to Calculate Daily Runoff in Smaller Catchments under SCS?

Daily Runoff in Smaller Catchments under SCS calculator uses Direct Surface Runoff = (Total Precipitation-0.2*Potential Maximum Retention)^2/(Total Precipitation+0.8*Potential Maximum Retention) to calculate the Direct Surface Runoff, The Daily Runoff in Smaller Catchments under SCS formula is defined as the nonlinear and complex process, is essential for designing canals, water management and planning, flood control and predicting soil characteristics. Direct Surface Runoff is denoted by Q symbol.

How to calculate Daily Runoff in Smaller Catchments under SCS using this online calculator? To use this online calculator for Daily Runoff in Smaller Catchments under SCS, enter Total Precipitation (PT) & Potential Maximum Retention (S) and hit the calculate button. Here is how the Daily Runoff in Smaller Catchments under SCS calculation can be explained with given input values -> 13.34722 = (16-0.2*2.5)^2/(16+0.8*2.5).

FAQ

What is Daily Runoff in Smaller Catchments under SCS?
The Daily Runoff in Smaller Catchments under SCS formula is defined as the nonlinear and complex process, is essential for designing canals, water management and planning, flood control and predicting soil characteristics and is represented as Q = (PT-0.2*S)^2/(PT+0.8*S) or Direct Surface Runoff = (Total Precipitation-0.2*Potential Maximum Retention)^2/(Total Precipitation+0.8*Potential Maximum Retention). Total Precipitation is the sum of rainfall and the assumed water equivalent of snowfall for a given year & The potential maximum retention mainly represents infiltration occurring after runoff has started.
How to calculate Daily Runoff in Smaller Catchments under SCS?
The Daily Runoff in Smaller Catchments under SCS formula is defined as the nonlinear and complex process, is essential for designing canals, water management and planning, flood control and predicting soil characteristics is calculated using Direct Surface Runoff = (Total Precipitation-0.2*Potential Maximum Retention)^2/(Total Precipitation+0.8*Potential Maximum Retention). To calculate Daily Runoff in Smaller Catchments under SCS, you need Total Precipitation (PT) & Potential Maximum Retention (S). With our tool, you need to enter the respective value for Total Precipitation & Potential Maximum Retention 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 Direct Surface Runoff?
In this formula, Direct Surface Runoff uses Total Precipitation & Potential Maximum Retention. We can use 2 other way(s) to calculate the same, which is/are as follows -
  • Direct Surface Runoff = (Total Precipitation-0.3*Potential Maximum Retention)^2/(Total Precipitation+0.7*Potential Maximum Retention)
  • Direct Surface Runoff = (Total Precipitation-0.1*Potential Maximum Retention)^2/(Total Precipitation+0.9*Potential Maximum Retention)
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