1. What is Discharge per Unit Length of Drain?

The Discharge per unit Length of the Drain refers to the amount of water entering a drain per unit length. It is a crucial parameter in drainage engineering that helps determine the capacity requirements for drainage systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( q_d \) — Discharge per unit Length of the Drain (m³/s)
• \( R \) — Natural Recharge (m³/s)
• \( L \) — Length between Tile Drain (m)

Explanation: The formula calculates the discharge rate per unit length of drain based on natural recharge rates and the spacing between tile drains in a drainage system.

3. Importance of Drain Discharge Calculation

Details: Accurate calculation of discharge per unit length is essential for designing efficient drainage systems, preventing waterlogging, managing groundwater levels, and ensuring proper agricultural drainage.

4. Using the Calculator

Tips: Enter natural recharge in m³/s and length between tile drains in meters. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is natural recharge in drainage systems?
A: Natural recharge refers to the process by which groundwater is replenished naturally when precipitation infiltrates the ground and moves through soil layers to reach the water table.

Q2: How does drain spacing affect discharge?
A: Closer drain spacing typically results in higher discharge per unit length as more water is intercepted by the drainage system over a given area.

Q3: What units should be used for input values?
A: Natural recharge should be in cubic meters per second (m³/s) and length between drains should be in meters (m) for consistent results.

Q4: When is this calculation most applicable?
A: This calculation is particularly useful for agricultural drainage design, urban drainage planning, and groundwater management projects.

Q5: Are there limitations to this formula?
A: The formula assumes uniform soil conditions and recharge rates. Actual field conditions may vary due to soil heterogeneity, varying precipitation patterns, and other environmental factors.