Parts F and G only 3. a. If an artesian aquifer is intercepted by a wel36.6 m (120 ft) deep and the water rises in a stand-pipe to a height of 3 m (10 ft) above the groundsurface, how many meters (feet) of artesian pres-sure exist for this well?b. What type of well is it?gric. What was the pressure in kg/m² (psf and psi) foralove the water in the aquifer before entering the well?d. If the piezometric pressure in the aquifer isan reduced 4.6 m (15 ft) for every 1.6 km (1 mi) ofhorizontal distance, what is the hydraulic gradientfor the aquifer?e. If the hydraulic conductivity of the sandstone is 4.7m/day (15.3 ft/day), what is the average velocity offlow through the sandstone? f. Assuming a porosity of 18% for the sandstone,what is the seepage velocity for that unit?g. How long does it take for water to travel 1.6 km(1 mi) in the sandstone aquifer assuming the effectsof pumping are minimal?

Answered: Image /qna-images/answer/8b6073d3-8bc8-4345-81a0-e12c3400c7a8.jpg

f. Assuming a porosity of 18% for the sandstone, what is the seepage velocity for that unit? g. How long does it take for water to travel 1.6 km (1 mi) in the sandstone aquifer assuming the effects of pumping are minimal?

f. Assuming a porosity of 18% for the sandstone, what is the seepage velocity for that unit? g. How long does it take for water to travel 1.6 km (1 mi) in the sandstone aquifer assuming the effects of pumping are minimal?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Calculation of Settlement

The vertical displacement of the structural foundation due to the loading from the superstructure is known as settlement. It is due to the reduction of air voids present in the soil. The amount of vertical displacement depends on the bearing capacity of the soil on which the foundation is laid. The effect of the settlement depends on the magnitude of settlement, uniformity, and the structural design of the structure. The maximum allowable settlement for residential and office buildings should be less than 18 mm, for industrial buildings, it is 38 mm and for commercial buildings, it is 25 mm.

Question

Parts F and G only

3. a. If an artesian aquifer is intercepted by a wel
36.6 m (120 ft) deep and the water rises in a stand-
pipe to a height of 3 m (10 ft) above the ground
surface, how many meters (feet) of artesian pres-
sure exist for this well?
b. What type of well is it?
gric. What was the pressure in kg/m² (psf and psi) for
alove the water in the aquifer before entering the well?
d. If the piezometric pressure in the aquifer is
an reduced 4.6 m (15 ft) for every 1.6 km (1 mi) of
horizontal distance, what is the hydraulic gradient
for the aquifer?
e. If the hydraulic conductivity of the sandstone is 4.7
m/day (15.3 ft/day), what is the average velocity of
flow through the sandstone?

f. Assuming a porosity of 18% for the sandstone,
what is the seepage velocity for that unit?
g. How long does it take for water to travel 1.6 km
(1 mi) in the sandstone aquifer assuming the effects
of pumping are minimal?

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