Geoscience Reference
In-Depth Information
Table 26.3
Meteorological data measured 2 m above the 30 m high forest for use in question 9(h) and 9(i).
Time (hour)
Wind speed
(m s
−1
)
Solar radiation
(W m
−2
)
Available
energy (W m
−2
)
Vapor pressure
deficit (kPa)
Temperature (°C)
0.5
1.39
0
17
26.74
0.56
1.5
1.11
0
1
26.13
0.48
2.5
1.30
0
9
25.47
0.41
3.5
1.36
0
−2
25.08
0.33
4.5
0.70
0
2
24.83
0.28
5.5
0.87
0
0
24.32
0.20
6.5
1.84
0
2
23.72
0.11
7.5
1.34
84
7
24.74
0.24
8.5
0.36
333
30
26.02
0.42
9.5
0.77
602
412
27.56
0.69
10.5
1.46
832
564
28.89
0.93
11.5
2.36
965
697
30.00
1.25
12.5
1.75
981
638
30.93
1.57
13.5
3.16
1075
755
31.75
1.97
14.5
2.77
994
618
32.11
2.05
15.5
2.68
732
374
32.03
2.09
16.5
2.85
617
321
32.66
2.33
17.5
1.90
346
131
32.48
2.29
18.5
1.97
85
26
31.75
2.08
19.5
0.88
0
−3
30.39
1.72
20.5
1.18
0
−16
28.72
1.12
21.5
0.98
0
−9
27.71
0.90
22.5
2.42
0
−2
27.58
0.92
23.5
1.90
0
16
27.36
0.91
Question 10
(Uses understanding and equations
from Chapters 2, 5, and 23.)
Create spreadsheets to make the calculations that are demonstrated in Tables 23.1,
23.2, 23.3 23.4 using the data for three sites in Australia given in Table 26.4. Then
create a spreadsheet to make calculations of crop evaporation in a table similar to
Table 23.6 but in this case for Alfalfa, Cotton and Sugar Cane. In this way you will
create a spreadsheet that you can use to give daily estimates of evaporation
wherever relevant data are available.
Example Answers
Answer 1
(a) Near the desert floor where the altitude is 3700 ft, or 1128 m, air tempera-
ture is 45.56°C, or 318.71 K, air pressure is 1006 mb, or 100.6 kPa, saturated