Specific Capacity

Specific capacity is defined as the discharge per unit drawdown at the well. It is one of the most important parameters in groundwater hydrology and is used to determine the yield of a well.

The specific capacity of a well is determined by conducting a pumping test. During a pumping test, the well is pumped at a constant rate and the drawdown (the amount the water level drops) is measured at different times. The specific capacity is then calculated by dividing the discharge by the drawdown.

The specific capacity of a well depends on a number of factors including the geology of the aquifer, the size and depth of the well, and the pumping rate. It is an important parameter to consider when designing a well field or when evaluating the performance of an existing well.

In general, wells with high specific capacities are more productive than those with low specific capacities. However, it is important to note that the specific capacity alone does not provide a complete picture of the yield of a well. Other factors such as the well screen design and the quality of the aquifer must also be considered.

Conclusion

In conclusion, the discharge per unit drawdown at the well is known as specific capacity. It is an important parameter in groundwater hydrology and is used to determine the yield of a well. Conducting a pumping test is the best way to determine the specific capacity of a well.

Specific capacity is rate of water released from storage of unconfined aquifer per unit draw down in aquifer