A well 0.5 m in diameter penetrates 33 m below the static water table. After a long period of pumping at a rate of 80 m³/hr, the drawdowns in wells 18 and 48 m from the pumped well were found to be 1.8 and 1.1 respectively. (1) What is the transmissivity of the aquifer? (2) What is the approximate drawdown in the pumped well? (3) Determine the radius of influence of the pumping well.

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Groundwater Flow

The term groundwater refers to the water which is found beneath the earth's surface. Pores present in the soil and rocks with fractures make a passage for rainwater to enter the earth's surface and deposit as groundwater. The flow nature and direction of groundwater under the earth's surface directly impacts the strength and compressibility of the soil, which reflects its ability to support structural loads.