There is a capillary action that takes place above the groundwater table up to 1.3 m in height. Assume the unit weight of water is ten kPa. Calculate the pore water pressure at the surface of groundwater table О 13 КРа O -10 kPa О ОКРа O -13kPa
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- With an observation well situated is 69.7 ft away from the pumping well (which is pumping at the rate of 305 gal/min). The aquifer is confined, and the depth has been measured from well logs and is 150 ft. please show using this data how to calculate transmissivity (T), the hydraulic conductivity (K) and Storativity (S) for the aquifer. Thank You s (m) t (sec) 20.7 4074.3 30.76 6054.6 46.3 9054.6 67.33 13254.6 107.26 21114 152.67 30054 209.37 41274 305.38 60114 451.68 88914 671.44 132174 946.07 186234 1321.9 260214A new construction project needs to be done in a week. It is to design a cylindrical water tank in a small residential house. The workers used a diameter of 550mm assuming that the water pressure is 0.0075GPa. If the pressure vessel is 110 MPa, determine the allowable thickness of the tank.Q2) Calculate the value of pressure ∆p onside the rain water droplet , if we knowthe radius R=0.2mm and the surface tensionδ = 0.074 N/M
- 1. A confined aquifer is recharged by a continuous supply of water from the certain source. The average thickness of the aquifer was determined to be 18 m and the average width is 8 km. The hydraulic conductivity of the aquifer was obtained at 60 m/day and its void ratio is 0.1586. The piezometer heads in two wells 2,145m apart are 128 meters and 188 meters from a common reference datum. Determine: •compute the rate of flow through the aquifer in m3/day •compute the seepage velocity in m/day •compute the time of travel from the head of the aquifer to a point 8 km downstream in daysGive me right solution according to the question. Urgent please A 20-cm diameter well completely penetrates a confined aquifer of permeability 0.088 cm/sec. The length of the aquifer is 34 m. When pumping was kept constant at 78 L/sec, the drawdown at an observation well, 112 meters from the pumping well, was found to be 0.79 meters. Determine the drawdown at the face of the pumping well (in meters).A well pumps at a steady rate of 70gallons/minute (265L/min). It is located 50ft (15.2m) from a lakeshore that is roughly straight. The well is installed in a 6 inch (15.2cm) diameter hole. The well screen and the lake penetrate the same confined aquifer. While pumping, the head in the well is 6.5ft (1.98m) lower than the head in the lake. Estimate the average transmissivity of the aquifer near the well and report your answer inft2/day or m2/day. Assume that without the well pumping, the head at the well is essentially the same as the head in the lake. Be careful to use consistent units in your calculations.
- What height of a column of a special gage liquid (sp. gr. = 2.95) exert the same pressure as a column of oil 4.5 meters high (sp.gr. = 1.19)? a. 1.58 m b. 1.28 m c. 1.85 m d. 1.82 m- Calculate The Transmissivity and Storativity of Confined Aquifer If you know the value of u function is 1 and w (u) is 10. The Drawdow A DISTANCE from Pumping Well is 35.5 M and Well Pumping Rate is (5.43 x 103 m3 / d). *A drainage pipe became completely blocked during/ a storm by a plug of sand, 1.5 m long, followed by another plug of a mixture of clays, silts and sands, 0.5m long, as shown in the attached figure. When the storm was over, the water level above ground was 1 m. The coefficient of permeability of the sand is 2x that of the mixture of clays, silts and sands. a. Calculate the pore water pressure at the center of the sand plug in kPa.Calculate the pore water pressure at the center of the mixture of clays, silts and sands in kPa. Find the average hydraulic conductivity in the sand. Find the average hydraulic conductivity in the mixture of clays, silts and sands
- A drainage pipe became completely blocked during/ a storm by a plug of sand, 1.5 m long, followed by another plug of a mixture of clays, silts and sands, 0.5m long, as shown in the attached figure. When the storm was over, the water level above ground was 1 m. The coefficient of permeability of the sand is 2x that of the mixture of clays, silts and sands. a. Calculate the pore water pressure at the center of the sand plug in kPaCalculate the drawdown halfway between the two wells if the wells are 400 ft apart, the original groundwater table is 230 ft above the bottom of the aquifer, and the hydraulic conductivity of the aquifer is 2.0 ft/day. Each well is pumped at a rate of 250 gals/min.If the soil has a capacity to hold water at 35%, with hygroscopic water of 5%, and you added 40%, how much is the unavailable water? *a.) 10%b.) 30%c.) 5%d.) 0