3.5
A
TMOSPHERIC
P
RESSURE
...................................................................................................... 4
3.6
Q
UALITY OF
W
ATER
.............................................................................................................. 5
4.0
METHODS OF DETERMINING EVAPORATION ............................................................ 6
4.1
W
ATER
B
UDGET
/
S
TORAGE
E
QUATION
M
ETHOD
................................................................ 6
4.2
M
EASUREMENT IN AN
A
UXILIARY
P
AN
................................................................................. 9
4.3
E
MPIRICAL
F
ORMULAE
........................................................................................................ 10
4.4
M
ASS
T
RANSFER OR
H
UMIDITY AND
W
IND
V
ELOCITY
G
RADIENT
M
ETHOD
.................... 12
4.5
E
NERGY
B
UDGET
/
I
NSOLATION
M
ETHOD
.......................................................................... 12
5.0
MONTHLY AND ANNUAL EVAPORATION ................................................................... 13
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