Equation For Gross Water Draft Calculator

Equation For Gross Water Draft:

\[ DG = RG - B + Is + I - (h \times SY \times A) \]

Gross Recharge due to Rainfall (RG):

Cubic Meter per Second

Base Flow into the Stream from the Area (B):

Cubic Meter per Second

Recharge of Ground Water Body (Is):

Cubic Meter per Second

Net Ground Water Flowing Outside Catchment (I):

Cubic Meter per Second

Water Level Fluctuation (h):

Meter

Specific Yield (SY):

Unitless

Watershed Area (A):

Square Meter

Gross Water Draft (DG):

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1. What is the Equation For Gross Water Draft?

The Equation For Gross Water Draft calculates the total volume of water extracted or utilized from a catchment area. It considers various hydrological parameters including recharge, base flow, groundwater recharge, net groundwater flow, water level fluctuation, specific yield, and watershed area.

2. How Does the Calculator Work?

The calculator uses the equation:

\[ DG = RG - B + Is + I - (h \times SY \times A) \]

Where:

\( DG \) — Gross Water Draft (Cubic Meter per Second)
\( RG \) — Gross Recharge due to Rainfall (Cubic Meter per Second)
\( B \) — Base Flow into the Stream from the Area (Cubic Meter per Second)
\( Is \) — Recharge of Ground Water Body (Cubic Meter per Second)
\( I \) — Net Ground Water Flowing Outside Catchment (Cubic Meter per Second)
\( h \) — Water Level Fluctuation (Meter)
\( SY \) — Specific Yield (Unitless)
\( A \) — Watershed Area (Square Meter)

Explanation: The equation accounts for the balance between water inputs (recharge and groundwater flows) and outputs (base flow and water level fluctuation effects) in a watershed area.

3. Importance of Gross Water Draft Calculation

Details: Accurate Gross Water Draft estimation is crucial for water resource management, assessing water availability, planning water extraction projects, and maintaining sustainable water usage in catchment areas.

4. Using the Calculator

Tips: Enter all parameters in their respective units. Ensure all values are valid (non-negative numbers). The calculator will compute the Gross Water Draft based on the hydrological balance equation.

5. Frequently Asked Questions (FAQ)

Q1: What is Gross Water Draft?
A: Gross Water Draft refers to the total volume of water extracted or utilized from a catchment area, including all types of water usage and extraction.

Q2: Why is Specific Yield important in this calculation?
A: Specific Yield represents the volume of water that a saturated rock or soil will yield due to gravity drainage, which is crucial for understanding water level fluctuations in the aquifer.

Q3: How does water level fluctuation affect the calculation?
A: Water level fluctuation during monsoon season affects the available water storage in the aquifer, which is accounted for in the equation through the term h × SY × A.

Q4: What is the significance of net groundwater flow outside catchment?
A: This represents the steady-state groundwater flow through aquifers that moves outside the catchment area, which affects the overall water balance.

Q5: When should this equation be used?
A: This equation is particularly useful for water resource engineers, hydrologists, and environmental planners when assessing water availability and planning sustainable water extraction from catchment areas.