If water is reservoir 1 is contaminated then the time (in days,
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- Two reservoirs are connected through a homogeneous and isotropic aquifer having hydraulic conductivity (k) of 25 m/day and effective porosity (n) of 0.3 as shown in the figure (not to scale). Ground water is flowing in the aquifer at the steady state. Reservoir 1 30 m 10° 5m Aquiclude Aquifer 2 km Datum K= 25 m/day n = 0.3 10 m Reservoir 2 If water is reservoir 1 is contaminated then the time (in days, round off to one decimal place) taken by the contaminated water to reach to Reservoir 2 will beA confined aquifer of 15 m constant thickness is sandwiched between two aquicludes as shown in the figure (not drawn to scale) Piezometer P 55.2 m Piezometric Surface Aquiclude Aquifier: Piezometer Q Aquiclude 34.1 m L = 2500m The heads indicated by two piezometers P and Q are 55.2 m and 34.1 m, respectively. The aquifer has a hydraulic conductivity of 80 m/day and its effective porosity is 0.25. If the distance between the piezometers is 2500 m, the time taken by the water to travel through the aquifer from piezometer location P to Q (in days, round off to 1 decimal place) isA confined aquifer of 15 m constant thickness is sandwiched between two aquicludes as shown in the figure (not drawn to scale) 55.2 m Peizometer P Aquiclude Piezometric Surface Aquiclude Peizometer Q L = 2500 m S 34.1 m AUSM Reference Datum The heads indicated by two piezometers P and Q are 55.2 m and 34.1 m, respectively. The aquifer has a hydrau- lic conductivity of 80 m/day and its effective porosity is 0.25. If the distance between the piezometers is 2500 m, the time taken by the water to travel through the aquifer from piezometer location P to Q (in days, round off to 1 decimal place) is
- A confined aquifer is recharged by a continuous supply of water from the certain source. The ave. Thickness of the aquifer was determined to be 25m and the ave width is 4 km. The hydraulic conductivity ( coefficient permeability ) of the aquifer was obtained at 40m per day and its porosity is 25% .The piezometer heads in two wells 1.325km apart are 65 m and 60m . from a common reference datum.From the given data, obtain: 1) The rate of flow through the aquifer in cubic meter per day; 2) Evaluate the seepage velocity in meters per day; 3) Estimate the time of travel, in days, from the head of the aquifer to a point 4km downstream.A confined aquifer has a of recharge. K for the aquifer is 60 m/day, and n is 0.3. The piezometric head in two wells 1500 m apart is 70m and 60m respectively, from a common datum. The average thickness of the aquifer is 35m. Calculate the following. a. Volume discharged in 2 days in m3 Blank 1 b. Seepage velocity (cm/s) Blank 21. A piezometer point is 35 m above mean sea level. The fluid pressure in the aquifer at that point is 6.70 x 10E+6 N/m2. The aquifer has fresh water at a temperature of 15 degree C. a) What is the point water pressure head? b) What is the total head?
- A 30 cm well penetrates 45 m below the static water table. After a long period of pumping at a rate of 1200 lpm, the drawdown in the wells 20 m and 45 m from the pumped well is found to be 3.8 and 2.4 m respectively. Determine the transmissivity (-K*aquifer thickness) of the aquifer. What is the drawdown in the pumped well? [Hint: Use water table depth as aquifer thickness in the case of unconfined aquifer]A confined aquifer of 15 m constant thickness is sandwiched between two aquicludes as shown in the figure (not drawn to scale) 55.2 m BT Peizometer P Reference Datum Aquiclude Piezometric Surface Aquiclude Peizometer Q L = 2500 m 34.1 m ונטוב SOM The heads indicated by two piezometers P and Q are 55.2 m and 34.1 m, respectively. The aquifer has a hydrau- lic conductivity of 80 m/day and its effective porosity is 0.25. If the distance between the piezometers is 2500 m, the time taken by the water to travel through the aquifer from piezometer location P to Q (in days, round off to 1 decimal place) isProblem #2 GW Aquifers Suppose an unconfined aquifer lies over a confined aquifer as shown below. Determine the flow out of both aquifers at L = 1200 m. GS K, = 25 m/day Impervious layer 100 m 88 m 66 m K2 = 70 m/day 1200 m
- (b) | A 400 mm diameter well fully penetrates a confined aquifer of thickness 20 m is pumped at a constant rate of 2500 m/day. The drawdown in the pumping well is observed as 4 m and the radius of influence is at a distance of 100 m. (i) Calculate the transmissivity of the aquifer; (ii) Determine the hydraulic conductivity of the aquifer material and draw the neat sketch of the wellA confined aquifer has a source of recharge. The hydraulic conductivity of the aquifer is 40 m/day and its porosity is 0.25. The piezometric head in the two wells 1000m apart is 65 m and 60 m respectively from a common data. The average thickness of the aquifer is 25 m and the average width is 4 km. Compute the time of travel from the head of the aquifer to a point 3 km downstream in months. Round off to the nearest whole number. 1 month = 30 days %3DCalculate specific yield of an aquifer if a = 9.9 and B = -0.60 %3D Discharge = 80 L/s Max drawdown = 0.8 m Saturated thickness = 20 m O 0.20 O 0.40 O 0.10 0.30