Environmental Engineering Reference
In-Depth Information
Field site data
Staff gage
0.750 m (manually read)
Potentiometer
0.755 m
dts
0.198 m (manually measured)
dtw
0.178 m (manually measured)
Barometer
100.510 kPa
Pressure transducer
110.610 kPa
Pressure-transducer offset
0.250 m
1. What is the dwc in m of water? Assume fresh water at 20
C. (therefore, density
¼
998 kg/m
3
)________________________________
2. What does the pressure transducer indicate for head in the piezometer in m
relative to the local datum?________________________________
3. What do the sensors indicate for
Δ
h
?____________________________
4. What is the manually measured
Δ
h
?____________________________
5. Is the potential for flow upward or downward based on the measured values?
____________________________
6. How does the
Δ
h
indicated by the sensors differ from the
Δ
h
calculated from the
manual measurements?____________________________
7. What is the gradient assuming the midpoint of the well screen is 0.75 m below
the wetland bottom?____________________________
8. If the top of the staff gage plate is at an elevation of 102.550 m, what is the elevation
of the water level inside of the piezometer?____________________________
