Prob 3 Pumping test was carried out in a layer of soil extending to a depth of 28 m. The initial position of the water table is located 4m below the ground. Observation wells were sighted 33.5m & 97.5m from the pumping well. Water is pumped at 248.4 m³/hr and when steady levels were attained, the drawdowns at the observation wells were observed to be lilm and 0.54m respectively. @Draw the diagram showing the unconfined aquifer, pumping & observation wells, and the water levels 6 Compute the couff. of permability
Prob 3 Pumping test was carried out in a layer of soil extending to a depth of 28 m. The initial position of the water table is located 4m below the ground. Observation wells were sighted 33.5m & 97.5m from the pumping well. Water is pumped at 248.4 m³/hr and when steady levels were attained, the drawdowns at the observation wells were observed to be lilm and 0.54m respectively. @Draw the diagram showing the unconfined aquifer, pumping & observation wells, and the water levels 6 Compute the couff. of permability
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
From a constant head test on. fine sand, the following data were recrded.
Transcribed Image Text:Prob 3
Pumping test was carried out in a
layer of soil extending to a depth
of 28 m. The initial position of
the water table is located 4m
below the ground. Observation wells
were sighted 33.5m & 97.5m
from the pumping well. Water is pumped
at 248.4 m³/hr and when steady
levels were attained, the drawdowns
at the observation wells were observed
to be lilm and 0.54m respectively.
@Draw the diagram showing the unconfined
aquifer, pumping & observation wells, and
the water levels
6 Compute the coeff. of permability
*2
)
Transcribed Image Text:PERLY
cel
Theology-Madriaga
PE
B&W Andrade
UCSP-Dela Cruz, C.
Statistics - Manaiang
C.Arts-Abiva
FABM-Pialda
Fil 112-De Torres
P. Science Enrius
Probl
From a constant head test cn. fine
Sand, the following data were recorded:
Length of Sample
Diameter of sample
Constant head difference
Vol. of water collected
in 4 min.
16 cm
9,6cm
50 cm
420 cc
Determine the following:
@Coefficient of Permeability in cm/s
6 Discharge Velocity in cm/s
- If e=0.ss, seepage Velocity in cm
ст
Prob 2
A falling
head test
is performed on a
Sample soil. The standpipe having a diameter
0.2 cm is observed and it takes 60 seconds
for the water to drop by 50 cm from
an initial hydraulic head of 90 cm.
The sample has a length of 20 cm and
a diameter of 4 cm.
6
t
Find the coef. of permeability
Solve for the hydraulic gradient
Rate of flow in the soil.
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