The impact of urban groundwater upon surface water - eTheses ...

MONITORING NETWORKS AND METHODS
The value used was for a Hudson River sand (Clark, 1966) with a moisture content of 30%
and a value of 3.94 x 10 -3 cal.cm -1 s -1 . o C -1 (1.65 x 10 -2 J.cm -1 .s -1 .K -1 ). This may be compared
with the value of 2.3 x 10 -3 cal.cm -1 s -1 o C -1 (9.62 x 10 -3 J.cm -1 .s -1 .K -1 ) used by Silliman (1995).
Equation 1 may be solved for the following boundary conditions (Figure 4.6)
Tz=T0 at Z=0 and Tz=TL at Z=L
River
Riverbe
Sediment
Aquifer
L
z
T0
Tz
TL
Figure 4.6 Schematic diagram representing variables in the steady state temperature
calculation
Tz = the temperature at depth z
T0 = the uppermost temperature measurement
TL = the lowermost temperature measurement
L = the length of the vertical section over which temperature measurements extend
The solution is:
91
-
+
Vz