![]() 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. What was the average specific capacity for the year?Ī well has a specific capacity of 42 gpm per foot. The reduction in hydraulic head drives groundwater flow to the well (in the down-gradient direction), as shown in the example from Long Island in Figure 36. This drawdown generates a cone- or funnel-shaped depression called a cone of depression (Figure 35). The pumping level averaged 55 ft bgs for half the year and 68 ft bgs the other half. In doing so, pumping causes a reduction in hydraulic head, known as drawdown. 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. time-drawdown or distance-drawdown data and curve for each observation well and. In addition, the drawdown has decreased by 15%. Soulsby/ICRC Figure 4 Consallen Group Sales Ltd Figure 5 PAT-DRILL Figure 6 T. If surface waters are discharging to groundwater, or a well is drawing. 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. The static level is achieved when the flow into. It is measured as the difference between the initial level of water in a well before pumping, and the static, or stabilized, level of water after a long period of pumping. All large water supply wellfields in Palm Beach County draw water exclusively from the Surficial Aquifer System. mapping (well reports, conceptual model and field mapping). Drawdown is a term applied to the maximum lowering of the groundwater table caused by pumping or artesian flow ( Figure D60 ). 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. If proximal wells are drawing from separate aquifers, it is permissible for. From the data from the step draw down test pumping results in well 1, the curve. What is the drawdown?Ī groundwater well has a base elevation of 1,125 ft above sea level. Well 2 has a pH value of 7.19, TDS (Total. \)Ī well has a static water level of 23 ft bgs and a pumping level of 58 ft bgs.
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