What is the drawdown?Ī well has a calculated specific capacity of 30 gpm per foot and operates at a flow rate of 1.08 MGD. The well operates at a constant 1,500 gpm. In hydrology, a well test is conducted to evaluate the amount of water that can be pumped from a particular water well. What was the average specific capacity for the year?Ī well has a specific capacity of 42 gpm per foot. The pumping level averaged 55 ft bgs for half the year and 68 ft bgs the other half. For half the year the static water level was 25 ft bgs and half the year 42 ft bgs. If the original drawdown was 42 ft what is the current specific capacity?Ī well pumped 538 AF over a one year period averaging 10 hours of operation per day. In addition, the drawdown has decreased by 15%. The efficiency of the well has dropped 35%. When a well was first constructed it was pumping 1,750 gpm. After 3 hours of operation, the well produced 279,000 gallons. What is the pumping level of the well?Ī well has an hour meter attached to a water meter totalizer. A drawdown has been calculated out to be 65 ft. Production Testing The difference between the average reservoir pressure and the flowing bottomhole pressure. Storativity is the addition or release of water to the storage space due. If the drawdown on this well is 44 ft and the pumping level is 80 ft bgs, what is the static water elevation above sea level?Ī deep well has a static water level of 122 ft bgs. drawdown ft at distance r and time t after pumping began T aquifer transmissivity gpd/ft S aquifer storativity Q discharge or well-pumping rate gpm The exponential integral is easily calculated with u defined as above and is known as the Well Function, W(u). What is the drawdown?Ī groundwater well has a base elevation of 1,125 ft above sea level. \)Ī well has a static water level of 23 ft bgs and a pumping level of 58 ft bgs.
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