Will a 3/4 Inch Borewell Yield 2500 Liters of Water Per Day?

Understanding the yield of a borewell, especially one with a 3/4 inch diameter, is crucial for determining its water output potential. Several factors play a significant role in the yield of a borewell, which can determine whether it is capable of providing the desired daily amount of water.

Factors Affecting Borewell Yield

The yield of a borewell depends on several factors, including the depth of the well, the characteristics of the aquifer, the pumping rate, and seasonal variations. Let's break down each of these factors in detail.

Depth of the Borewell

The depth at which a borewell is drilled is a critical factor in determining its water yield. Deeper wells are more likely to access more aquifers, which can supply a higher volume of water. However, the actual yield can vary based on the geological conditions of the area. For instance, sands and gravel aquifers tend to yield more water than clay areas.

Aquifer Characteristics

The type of soil and rock formations in the area where the borewell is drilled have a significant impact on the water yield. For example, permeable materials like sand and gravel allow water to flow through easily, providing a higher yield. On the other hand, impermeable materials like clay can restrict the flow of water, leading to lower yields even at greater depths.

Pumping Rate

The rate at which water is pumped from the borewell can influence its yield. If the pumping rate exceeds the recharge rate of the aquifer, the well may run dry. It is essential to balance the pumping rate with the recharge rate to maintain sustainable water yields. A well-designed pumping system can help achieve this balance.

Seasonal Variations

Water levels fluctuate based on seasonal rainfall and usage. During rainy seasons, water tables rise, potentially increasing the daily yield. Conversely, during dry seasons, the water table may drop, leading to lower daily yields. Understanding these seasonal variations is crucial for planning and managing the water supply effectively.

Can a 3/4 Inch Borewell Yield 2500 Liters Per Day?

While a 3/4 inch borewell may have the potential to yield 2500 liters per day, it is important to note that this is not guaranteed for all borewells. Small borewells with such a diameter are typically not designed to support high water yields consistently. Larger diameter borewells, such as those with 4-inch diameters or more, are more likely to yield higher quantities of water.

Borewell Diameter .75 Inch Borewell 4 Inch Borewell Typical Yield Dependent on site conditions, often lower Higher and more consistent yields Appropriate for Low to moderate water demand Higher water demand, industrial use, etc.

To achieve a yield of 2500 liters per day from a 3/4 inch borewell, it is recommended to conduct a test pumping or consult with a local hydrogeologist who can analyze the specific conditions of your site. Additionally, the diameter of the borewell must be considered in conjunction with the motor power and pump efficiency to ensure sustainable yields.

Mathematical Calculation for a 3/4 Inch Borewell

The calculation of the water yield from a 3/4 inch borewell can be performed based on the cross-sectional area and the pumping rate. Let's break down the calculation step by step:

Step 1: Calculate the Cross-Sectional Area of the Borewell

The radius of the borewell is 3/8 inch, or 0.9525 cm. The area of the cross-section (A) is calculated using the formula for the area of a circle: A πr2.

A π(0.9525)2 2.8487 cm2

Step 2: Calculate the Volume of Water Pumped Per Minute

If the motor throws 10 meters of water per minute (10,000 cm per minute), the volume of water pumped per minute (V) is:

V 2.8487 cm2 × 10,000 cm 28,487 cm3 per minute 28.487 liters per minute

Step 3: Calculate the Daily Water Yield

To determine the daily water yield, we need to calculate the total volume of water pumped in an hour and then for a full day. There are 60 minutes in an hour:

V1 hour 28.487 liters/min × 60 min 1709.2 liters

V1 day 1709.2 liters/hr × 24 hrs 41,020.8 liters per day

From this calculation, we can see that a 3/4 inch borewell with a motor throwing 10 meters of water per minute can actually yield significantly more than 2500 liters per day. However, it is important to consider the factors mentioned earlier and have a thorough site analysis to ensure sustainable and reliable yields.

Planning for a 3/4 Inch Borewell

For a borewell with a 3/4 inch diameter, the following steps are recommended for achieving a yield of 2500 liters per day:

Hydrogeological Investigation: Conduct a thorough hydrogeological investigation to understand the aquifer characteristics and seasonal variations. Test Pumping: Perform test pumping to determine the actual yield under different conditions. Professional Consultation: Consult with a local hydrogeologist or borewell expert to refine your plans. Pump and Motor Selection: Choose a motor and pump that can handle the required flow rate without exceeding the recharge capacity of the aquifer.

By following these steps, you can ensure that your 3/4 inch borewell is capable of producing the desired water yield consistently.

Conclusion

While a 3/4 inch borewell can yield more than 2500 liters per day, the actual yield will depend on several factors. To achieve the desired yield, it is crucial to conduct thorough site analysis, perform test pumping, and consult with experts. Understanding the specific conditions of your site will help you make informed decisions regarding the design and operation of your borewell.