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WATER YEAR : 2013
NAN RIVER BASIN
Khwae Noi River at Ban Tha Ngam , Phitsanulok (N.22A)
Lat 16 - 59 - 33 N Long 100 - 19 - 31 E
Locat on : on e t an at Ban T a Ngam.
4,774
sq.km.
Staff gage
+41.630 m. (MSL.)
B.M.-H.D.
Near the gage site.
Elevation
5-time daily readings at 06.00, 09.00, 12.00, 15.00 and 18.00 hours.
Drainge Area
Location BM
Gage Reading Frequency
Zero Gage at Bottom
+52.936 m. (MSL.)
Bench Mark
Type of Gage
Amphoe
Wat Bot
Changwat
Phitsanulok
Ban
Tha Ngam
Arithmetic means of 5 readings
2008 to date
2008 to date
-
2008 to date
Fairly stable because of backwater effect.
No overbank flow.
Rating Operation
Period of Rating
Rated by Flot
Period of Available Gage Records
Basis of Mean Daily Gage Height
Rated by Current Meter
Stability of Channel Regimes
Overbank Flow Conditions
Records good. Stage-discharge relation defined by 29 discharge measurements made in 2013.
Date
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Annual
----------
-----------------
1
43.00
43.24
42.67
42.48
42.25
43.19
42.85
42.71
43.53
42.82
42.59
42.60
2
43.37
43.45
42.42
42.09
42.18
43.33
42.61
42.65
43.58
42.78
42.52
42.53
3
43.38
43.47
42.55
42.73
42.16
42.81
42.78
42.58
43.50
43.06
42.60
42.62
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Gage Height in Meter (MSL.) Water Year April 1, 2013 to March 31, 2014
General Description
4
43.40
43.45
42.23
42.70
42.03
42.99
42.50
42.60
43.29
43.06
42.66
42.66
5
43.41
43.62
42.21
42.77
42.16
42.88
42.89
42.44
44.31
42.85
42.74
42.57
6
43.41
43.63
42.11
42.39
41.99
42.70
42.12
42.64
45.04
42.93
42.71
42.58
7
43.40
43.66
41.66
43.11
42.04
43.14
42.18
42.61
44.89
42.85
42.29
42.30
8
43.38
43.21
42.44
43.14
41.87
43.09
41.43
42.59
44.84
42.86
42.22
42.19
9
43.40
43.10
42.44
42.58
41.93
43.28
41.36
42.61
44.01
42.95
42.44
42.43
10
43.39
43.13
42.40
42.71
42.02
43.24
41.89
43.12
43.99
42.84
42.59
42.42
11
43.38
43.17
42.30
42.75
42.77
43.17
42.28
43.19
43.46
42.71
42.28
42.43
12
43 36
43 07
42 23
42 55
42 09
43 13
42 80
43 07
43 02
42 80
42 22
42 49
.
.
.
.
.
.
.
.
.
.
.
.
13
43.27
43.06
42.32
41.71
42.25
43.29
43.28
42.97
43.05
42.88
42.28
42.90
14
43.19
43.41
42.11
42.07
42.10
42.24
43.38
42.99
43.02
43.02
42.55
42.45
15
43.21
43.37
42.34
41.56
42.45
42.78
43.37
43.11
42.91
42.93
42.71
42.57
16
43.24
43.40
42.35
41.32
42.50
42.75
43.32
43.78
43.02
42.77
42.81
42.49
17
43.05
43.34
41.86
42.44
43.07
43.06
43.43
43.71
43.20
42.48
42.67
41.85
18
43.62
43.33
41.65
42.40
42.37
42.77
43.32
43.65
43.29
42.55
42.25
42.09
19
43.36
43.36
42.13
42.38
42.22
42.40
43.26
42.92
43.41
42.62
42.11
42.19
20
43.33
43.33
42.72
42.35
41.48
42.81
43.56
42.83
43.35
42.67
42.55
42.11
21
43.36
43.40
43.42
42.30
41.27
42.63
43.11
43.06
43.31
42.36
42.08
41.93
22
43.36
43.35
43.19
42.14
42.16
42.70
43.19
43.05
43.32
42.65
42.16
41.93
23
43.37
43.23
42.62
42.43
42.93
42.78
43.15
43.03
43.29
42.52
42.40
42.11
24
43.15
43.29
42.60
42.49
42.90
42.57
43.20
43.03
43.35
42.65
42.49
42.07
25
43.13
43.30
42.74
42.39
42.86
42.77
42.79
43.03
42.82
42.62
42.33
42.03
26
43.11
43.22
42.94
41.90
42.82
42.52
43.75
43.03
42.87
42.56
42.36
42.03
27
43.10
43.20
42.87
42.77
42.65
42.88
43.73
43.11
42.89
42.48
42.29
42.40
28
43.08
43.07
42.64
42.94
42.77
44.25
43.75
43.04
43.03
42.40
42.54
42.35
29
43.07
43.02
42.56
42.94
42.73
43.92
43.51
43.02
42.79
42.38
42.43
30
43.07
42.71
42.53
42.91
42.79
42.91
42.99
42.75
42.88
42.53
42.43
31
42.53
42.16
43.02
42.71
42.85
42.58
42.41
----------
--------------
Mean
43.28
43.26
42.44
42.44
42.35
42.97
42.92
42.96
43.42
42.71
42.44
42.34
Max
43.62
43.66
43.42
43.14
43.07
44.25
43.75
43.78
45.04
43.06
42.81
42.90
45.04
Min
43.00
42.53
41.65
41.32
41.27
42.24
41.36
42.44
42.79
42.36
42.08
41.85
41.27
45.08
m. (MSL.) ,
41.63
m. (MSL.) ,
River Bed 38.99
m. (MSL.)
52.78
m. (MSL.) ,
52.77
m. (MSL.) ,
Drainage Area 4774 Square Kilometers
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at 15.00 Hours , on Dec 6 , 2013
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation