A tube well penetrates into an unconfined aquifer having a saturated depth of 80 m. When the drawdown was 12 m discharge from the well was 180 litres per minute. Assume steady state condition and radius of circle of influence same for both cases. Calculate the discharge at 18 m drawdown.

A tube well penetrates into an unconfined aquifer having a saturated depth of 80 m. When the drawdown was 12 m discharge from the well was 180 litres per minute. Assume steady state condition and radius of circle of influence same for both cases. Calculate the discharge at 18 m drawdown.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

An unconfined aquifer of 50m thickness has K = 30 m/day completely penetrates a well of radius 0.5 m. The well is pumped so that the water level in the well remains at 40m above the bottom. If the pumping has no effect on water table at r = 500m, the steady state discharge would be: (a) 122.80 litres/s (c) 225.16 litres/s (b) 142.12 litres/s (d) 386.52 litres/s
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 260214
QUESTION 11 1. The discharge from a fully penetrating well operating under steady state in a confined aquifer of 30 m thickness is 1500 liters/minutes. The drawdown observed at an observation well located at 20 m is 3 m. The transmissibility is 0.005 m²/s. Determine the location of the observation well with 0.5 m drawdown. Round off to two (2) decimal places, in m
There are two identical groundwater pump facilities that is operating 6 kilometers apart. The hydraulic conductivity is 40m/day. Each pump well structure has a tube diameter of 75cm. The original water table has an elevation of 110 m. However, it is maintained that the maximum drawdown (at the tube) is 18m. The water table will not change at the midpoint between the two pump wells. Determine the drawdown at a point 2 km from the pump.
Can I get the correct answer for the question.
ENVIRONMENTAL ENGINEERING ( Practice Questions) a). Suppose a well 0.36m in diameter has been pumped at a rate of 3,000cu.m/day for a long enough time that steady-state conditions apply. An observation well located 30m from the pumped well has been drawn down by 1.0m, and another well at 120m is drawn down by 0.4m. The pumped well extends completely through an unconfined aquifer 60.0m thick. GIVEN: For an unconconfined aquifer, Q = πK(h2c1 – h2c2) / [Ln(r1 / r2)] Determine the hydraulic conductivity, K. (7 marks) (ii) Estimate the drawdown at the pumped well. State any assumptions made. b). A confined aquifer 40.0 m thick has two monitoring wells spaced 400m apart along the direction of groundwater flow. The difference in water level in the wells is 4.0m (the difference in piezometric head). The hydraulic conductivity is 40m/day. Estimate the rate of flow per meter of distance perpendicular to the flow. C). Suppose the aquifer, which has a…
M - Problem 3: For these three reservoirs please assume that the elevations of the waterlines in reservoirs 1-3 are: h, 30 m, h₂-20 m, and h, 10 m. Also, please assume that the lengths of pipes 1-3 are L₁ 1000 m, L₂ 2000 m, and L3 = 3000 m; the diameters of all three pipes are D₁ D₂ D₂ = 2.0 m; and the friction coefficients of all three pipes are f f₂=fa=0.015. If you estimate that the total head at Junction "J" is H, = 22 m please: 1) calculate the resulting net volumetric flow rate into junction "J" and 2) determine if the actual total head at junction "J" is above or below H, = 22 m. h₂ Reservoir 1 h₂ 7 Reservoir 2 Pipe D Reservoir 3 ha Pipe 3 Pipe 2 a