14 Assessment of Some Diurnal Streamwater Profiles in Western …
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Fig. 14.10 Mean profiles of parameters in site 6: a temperature, b pressure, c relative humidity,
d electrical conductivity
of one, at 10:30 and 23:30 in site 6 and has a quasi-flat peak during the 9:30–12:15
hourly interval at site 7.
Means of water pressure, air pressure, air relative humidity and water electrical
conductivity in site 6 are as follow 0.694 psi, 14.099 psi, 81.77% and 135.57 µS/cm.
Means of water pressure, air pressure and water electrical conductivity in site 7 are
as follow 0.837 psi, 14.525 psi, and 217.66 µS/cm.
Mean water temperature of Cerna in site 8 (Fig. 14.12) was 7.18 °C, a clear
increase from site 7, that recorded the same time interval. This temperature, also
greater than that of the mean air temperature (4.89 °C) is obtained through the
numerous hyperthermal springs that feed the river. The minimum water temperature
is recorded at 8:30, 1 h after the minimum in the air temperature, and the maximum
are recorded at 16:00 (the same 1-h delay from the atmospheric maximum).
Site 9 is a case where water regulation for hydroelectric plants is strongly influencing the diurnal thermal water regime (Fig. 14.13). Moldova River exhibits at this
site 5 peaks per day in an average day, but there are also days with a singular diurnal
peak in temperature. The lowest valley in water temperature is recorded at 8:00,
479
Fig. 14.10 Mean profiles of parameters in site 6: a temperature, b pressure, c relative humidity,
d electrical conductivity
of one, at 10:30 and 23:30 in site 6 and has a quasi-flat peak during the 9:30–12:15
hourly interval at site 7.
Means of water pressure, air pressure, air relative humidity and water electrical
conductivity in site 6 are as follow 0.694 psi, 14.099 psi, 81.77% and 135.57 µS/cm.
Means of water pressure, air pressure and water electrical conductivity in site 7 are
as follow 0.837 psi, 14.525 psi, and 217.66 µS/cm.
Mean water temperature of Cerna in site 8 (Fig. 14.12) was 7.18 °C, a clear
increase from site 7, that recorded the same time interval. This temperature, also
greater than that of the mean air temperature (4.89 °C) is obtained through the
numerous hyperthermal springs that feed the river. The minimum water temperature
is recorded at 8:30, 1 h after the minimum in the air temperature, and the maximum
are recorded at 16:00 (the same 1-h delay from the atmospheric maximum).
Site 9 is a case where water regulation for hydroelectric plants is strongly influencing the diurnal thermal water regime (Fig. 14.13). Moldova River exhibits at this
site 5 peaks per day in an average day, but there are also days with a singular diurnal
peak in temperature. The lowest valley in water temperature is recorded at 8:00,