Spacing between Drains if Discharge is Considered Calculator

✖Coefficient of Permeability is the velocity in meters or centimeters per second of water through soils.ⓘ Coefficient of Permeability [k]			+10% -10%
✖Total discharge carried by drain is the total discharge per unit length carried by drain.ⓘ Total Discharge Carried by Drain [q]			+10% -10%
✖Maximum height of the drained water table above the impervious layer in meters.ⓘ Maximum Height of the Drained Water Table [b]			+10% -10%
✖Depth of imprevious stratum from centre of drains in meters.ⓘ Depth of Imprevious Stratum from Centre of Drains [a]			+10% -10%

✖Spacing between the drains in meters.ⓘ Spacing between Drains if Discharge is Considered [s]

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Formula

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Spacing between Drains if Discharge is Considered

Formula

`"s" = (4*"k")/"q"*(("b"^2)-("a"^2))`

Example

`"15.00726m"=(4*"0.001m/s")/"0.00174m³/s"*((("5.2m")^2)-(("4.529m")^2))`

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Spacing between Drains if Discharge is Considered Solution

STEP 0: Pre-Calculation Summary

Formula Used

Spacing Between the Drains = (4*Coefficient of Permeability)/Total Discharge Carried by Drain*((Maximum Height of the Drained Water Table^2)-(Depth of Imprevious Stratum from Centre of Drains^2))
s = (4*k)/q*((b^2)-(a^2))
This formula uses 5 Variables

Variables Used

Spacing Between the Drains - (Measured in Meter) - Spacing between the drains in meters.
Coefficient of Permeability - (Measured in Meter per Second) - Coefficient of Permeability is the velocity in meters or centimeters per second of water through soils.
Total Discharge Carried by Drain - (Measured in Cubic Meter per Second) - Total discharge carried by drain is the total discharge per unit length carried by drain.
Maximum Height of the Drained Water Table - (Measured in Meter) - Maximum height of the drained water table above the impervious layer in meters.
Depth of Imprevious Stratum from Centre of Drains - (Measured in Meter) - Depth of imprevious stratum from centre of drains in meters.

STEP 1: Convert Input(s) to Base Unit

Coefficient of Permeability: 0.001 Meter per Second --> 0.001 Meter per Second No Conversion Required
Total Discharge Carried by Drain: 0.00174 Cubic Meter per Second --> 0.00174 Cubic Meter per Second No Conversion Required
Maximum Height of the Drained Water Table: 5.2 Meter --> 5.2 Meter No Conversion Required
Depth of Imprevious Stratum from Centre of Drains: 4.529 Meter --> 4.529 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

s = (4*k)/q*((b^2)-(a^2)) --> (4*0.001)/0.00174*((5.2^2)-(4.529^2))

Evaluating ... ...

s = 15.0072620689655

STEP 3: Convert Result to Output's Unit

15.0072620689655 Meter --> No Conversion Required

FINAL ANSWER

15.0072620689655 ≈ 15.00726 Meter <-- Spacing Between the Drains

(Calculation completed in 00.004 seconds)

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Home » Engineering » Civil » Irrigation Engineering » Water Logging & Reclamation of Saline Soils » Relation to Predict the Spacing between Tile Drains » Spacing between Drains if Discharge is Considered

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< 2 Relation to Predict the Spacing between Tile Drains Calculators

Spacing between Drains if Discharge is Considered

Go Spacing Between the Drains = (4*Coefficient of Permeability)/Total Discharge Carried by Drain*((Maximum Height of the Drained Water Table^2)-(Depth of Imprevious Stratum from Centre of Drains^2))

Total Discharge carried by Drain

Go Total Discharge Carried by Drain = (4*Coefficient of Permeability)/Spacing Between the Drains*((Maximum Height of the Drained Water Table^2)-(Depth of Imprevious Stratum from Centre of Drains^2))

Spacing between Drains if Discharge is Considered Formula

What is Natural Drainage System?

Many areas have some natural drainage; this means that excess water flows from the farmers' fields to swamps or to lakes and rivers. Natural drainage, however, is often inadequate and artificial or man-made drainage is required. There are two types of artificial drainage: surface drainage and subsurface drainage.

How to calculate the Spacing of Drains in Tile Drainage System?

Given that hydraulic conductivity K = 0.5 mm/day above an impervious layer at a depth of 6.7 m. The excess irrigation rate is equivalent to a drainage coefficient of 1.3 mml/day. Therefore, the design value of the spacing of tile drains is 55.2 m.

How to Calculate Spacing between Drains if Discharge is Considered?

Spacing between Drains if Discharge is Considered calculator uses Spacing Between the Drains = (4*Coefficient of Permeability)/Total Discharge Carried by Drain*((Maximum Height of the Drained Water Table^2)-(Depth of Imprevious Stratum from Centre of Drains^2)) to calculate the Spacing Between the Drains, The Spacing between Drains if Discharge is Considered formula is defined as the design drain spacing as a function of the vertical and horizontal consolidation properties and effective drainage lengths and also the time period targeted to achieve the desired average degree of consolidation under combined vertical and radial drainage. Spacing Between the Drains is denoted by s symbol.

How to calculate Spacing between Drains if Discharge is Considered using this online calculator? To use this online calculator for Spacing between Drains if Discharge is Considered, enter Coefficient of Permeability (k), Total Discharge Carried by Drain (q), Maximum Height of the Drained Water Table (b) & Depth of Imprevious Stratum from Centre of Drains (a) and hit the calculate button. Here is how the Spacing between Drains if Discharge is Considered calculation can be explained with given input values -> 15.00726 = (4*0.001)/0.00174*((5.2^2)-(4.529^2)).

FAQ

What is Spacing between Drains if Discharge is Considered?

The Spacing between Drains if Discharge is Considered formula is defined as the design drain spacing as a function of the vertical and horizontal consolidation properties and effective drainage lengths and also the time period targeted to achieve the desired average degree of consolidation under combined vertical and radial drainage and is represented as s = (4*k)/q*((b^2)-(a^2)) or Spacing Between the Drains = (4*Coefficient of Permeability)/Total Discharge Carried by Drain*((Maximum Height of the Drained Water Table^2)-(Depth of Imprevious Stratum from Centre of Drains^2)). Coefficient of Permeability is the velocity in meters or centimeters per second of water through soils, Total discharge carried by drain is the total discharge per unit length carried by drain, Maximum height of the drained water table above the impervious layer in meters & Depth of imprevious stratum from centre of drains in meters.

How to calculate Spacing between Drains if Discharge is Considered?

The Spacing between Drains if Discharge is Considered formula is defined as the design drain spacing as a function of the vertical and horizontal consolidation properties and effective drainage lengths and also the time period targeted to achieve the desired average degree of consolidation under combined vertical and radial drainage is calculated using Spacing Between the Drains = (4*Coefficient of Permeability)/Total Discharge Carried by Drain*((Maximum Height of the Drained Water Table^2)-(Depth of Imprevious Stratum from Centre of Drains^2)). To calculate Spacing between Drains if Discharge is Considered, you need Coefficient of Permeability (k), Total Discharge Carried by Drain (q), Maximum Height of the Drained Water Table (b) & Depth of Imprevious Stratum from Centre of Drains (a). With our tool, you need to enter the respective value for Coefficient of Permeability, Total Discharge Carried by Drain, Maximum Height of the Drained Water Table & Depth of Imprevious Stratum from Centre of Drains and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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