Basic HTML Version
380
Location : on right bank at Ban Chom Phu.
-
sq.km.
WATER YEAR : 2011
NAN RIVER BASIN
Khlong Chom Phu at Ban Chom Phu , Phitsanulok (N.43A)
Lat 16 - 41 - 40 N Long 100 - 39 - 28 E
Drainge Area
Amphoe
Noen Maprang
Changwat
Phitsanulok
Ban
Chom Phu
Staff gage
+50.056 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.
Arithmetic means of 5 readings
2010 to date
Rating Operation
Period of Available Gage Records
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+59.558 m. (MSL.)
Type of Gage
Bench Mark
Location BM
2010 to date
-
2010 to date
Stable.
Overbank flow starts at elevation +58.610 m.(MSL.), records are channel flow only.
Records good. Stage-discharge relation defined by 22 discharge measurements made in 2011.
Rated by Current Meter
Stability of Channel Regimes
Overbank Flow Conditions
General Description
Period of Rating
Rated by Flot
Date
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Annual
----------
-----------------
1
51.83
52.04
52.58
52.63
54.73
56.11
54.43
52.36
51.76
51.51
51.88
51.73
2
51.94
52.06
52.40
53.16
55.26
56.54
55.07
52.35
51.75
51.51
51.88
51.79
3
51.96
52.05
52.37
54.19
54.32
56.18
56.84
52.32
51.75
51.51
51.89
51.85
4
51.95
52.04
52.38
54.72
53.66
55.23
56.10
52.28
51.74
51.49
51.91
51.68
5
51.93
52.03
53.12
53.04
53.21
56.89
55.67
52.26
51.74
51.48
52.01
51.56
6
51.94
52.30
55.39
52.61
52.91
57.45
55.60
52.24
51.73
51.48
51.97
51.56
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
51.93
52.23
54.81
52.49
53.12
57.32
54.75
52.23
51.71
51.42
51.91
51.60
8
51.95
52.26
53.09
52.41
53.27
57.07
54.24
52.23
51.71
51.68
51.91
51.60
9
51.95
52.21
53.62
52.28
53.75
57.39
54.11
52.22
51.70
52.06
51.91
51.58
10
51.90
52.22
53.86
52.58
53.25
57.56
53.80
52.20
51.69
52.06
51.90
51.57
11
51.95
52.26
52.58
52.40
53.65
56.52
53.54
52.19
51.69
52.06
51.92
51.73
12
51.94
52.13
52.43
52.33
55.19
56.23
54.24
52.18
51.68
52.01
51.88
51.81
13
51.95
52.16
52.35
52.94
54.27
56.70
54.36
52.15
51.67
52.01
51.83
51.95
14
51.95
52.34
52.41
52.46
54.03
56.95
54.08
52.11
51.66
52.01
51.91
51.84
15
51.95
52.25
52.28
52.77
54.80
57.13
53.46
52.09
51.66
51.99
51.88
51.81
16
51.95
52.13
52.79
53.62
54.53
57.21
53.34
52.06
51.65
51.96
51.82
51.81
17
51.96
52.08
52.45
52.69
56.29
56.08
53.05
52.06
51.63
51.96
51.76
51.75
18
51.94
52.21
52.97
52.68
55.30
55.48
52.99
52.05
51.60
51.96
51.83
51.63
19
51.96
52.34
54.04
52.66
55.08
55.26
52.95
52.03
51.58
51.96
51.82
51.46
20
51.99
53.48
53.39
53.56
55.36
54.94
52.86
52.00
51.56
51.96
51.83
51.60
21
52.01
52.20
54.67
55.17
57.66
55.16
52.80
51.96
51.55
52.01
51.77
51.56
22
52.01
52.14
53.97
55.70
56.70
55.18
52.75
51.90
51.54
52.03
51.82
51.43
23
52.11
52.08
53.21
54.26
56.25
55.78
52.70
51.88
51.54
52.01
51.79
51.46
24
52.04
52.06
53.77
53.38
55.08
56.14
52.67
51.86
51.53
52.06
51.83
51.49
25
52.03
52.06
53.61
53.39
54.41
55.58
52.66
51.85
51.52
52.03
51.73
51.45
26
52.01
52.11
52.64
53.06
54.09
55.61
52.59
51.82
51.51
51.99
51.78
51.43
27
52.01
52.36
52.56
54.14
54.32
56.14
52.55
51.78
51.51
51.89
51.73
51.44
28
52.02
52.26
52.58
53.58
55.23
55.76
52.49
51.76
51.50
51.97
51.71
51.36
29
52.06
52.83
52.47
53.56
54.31
55.68
52.45
51.76
51.49
52.00
51.81
51.34
30
52.06
56.23
52.43
53.01
58.07
54.61
52.52
51.75
51.48
52.01
51.28
31
53.88
52.58
57.13
52.40
51.48
51.96
51.29
----------
--------------
Mean
51.97
52.42
53.11
53.23
54.81
56.20
53.68
52.06
51.62
51.87
51.85
51.59
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Max
52.11
56.23
55.39
55.70
58.07
57.56
56.84
52.36
51.76
52.06
52.01
51.95
58.07
Min
51.83
52.03
52.28
52.28
52.91
54.61
52.40
51.75
51.48
51.42
51.71
51.28
51.28
58.96
m. (MSL.) ,
50.06
m. (MSL.) ,
River Bed 49.73
m. (MSL)
58.72
m. (MSL.) ,
58.60
m. (MSL.) ,
Drainage Area
Square Kilometers
at 18.00 Hours , on Aug 30 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Right Bank Elevation
Left Bank Elevation