Daily Question June 17, 2015 (EIA Discussion): 3 Wealth points for replies, plus 5 Wealth points for correct answers
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This post was last edited by Zhang Xiaopeng on 2015-6-18 at 15:19. 26. A certain canal is 1000 meters long; its sides are in close contact with shallow groundwater and contribute to replenishing it. It is known that the permeability coefficient of the confined aquifer is 100 m/d, the hydraulic gradient of the groundwater is 0.5%, and the average thickness of the aquifer within this hydraulic gradient range is 4 m. Then the amount of groundwater replenishment due to seepage from this canal is ( ). A. 1000 m3/d B. 2000 m3/d C. 3000 m3/d D. 4000 m3/d Explanation: Seepage recharge volume = seepage recharge per unit length * length of the canal. Seepage recharge per unit length = permeability coefficient of the phreatic aquifer * hydraulic gradient * thickness of the aquifer. The correct answer is B
A certain canal is 1000 meters long, and its sides are in close contact with shallow groundwater, which replenishes that groundwater. It is known that the permeability coefficient of the confined aquifer is 100 m/d, the hydraulic gradient of the groundwater is 0.5%, and the average thickness of the aquifer within this hydraulic gradient range is 4 m. Then the amount of groundwater recharge due to seepage from this canal is (D).
26. A certain canal is 1000 meters long, and its sides are in close contact with shallow groundwater, which replenishes it. It is known that the permeability coefficient of the confined aquifer is 100 m/d, the hydraulic gradient of the groundwater is 0.5%, and the average thickness of the aquifer within this hydraulic gradient range is 4 m. Then the amount of groundwater recharge due to seepage from this canal is (D). A.1000m3/d B.2000m3/d C.3000m3/d D.4000m3/d
c.............................
A certain canal is 1000 meters long, and its sides are in close contact with shallow groundwater, which replenishes it. It is known that the permeability coefficient of the confined aquifer is 100 m/d, the hydraulic gradient of the groundwater is 0.5%, and the average thickness of the aquifer within this hydraulic gradient range is 4 m. Then the amount of groundwater recharge due to seepage from this canal is (B. 2000 m3/d). A.1000m3/d B.2000m3/d C.3000m3/d D.4000m3/d