Basic HTML Version
398
Location : on right bank at the bridge on highway.
621
sq.km.
WATER YEAR : 2011
NAN RIVER BASIN
Nam Yao at Ban Pang Sa , Nan (N.65)
Lat 19 - 13 - 47 N Long 100 - 45 - 27 E
Amphoe
Tha Wang Pha
Changwat
Nan
Ban
Pang Sa
Drainge Area
Staff gage
+248.891 m. (MSL.)
B.M.- H.D.
On right bank about 20 meters from the top staff gage.
Elevation
3-time daily readings at 06.00, 12.00, and 18.00 hours.
Arithmetic means of 3 readings
1996 to date
+257.381 m. (MSL.)
Bench Mark
Type of Gage
Rating Operation
Period of Available Gage Records
Location BM
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
1996 to date
-
1996 to date
Stable.
No overbank flow.
Records good. Stage-discharge relation defined by 43 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
249.61
249.95
249.80
251.61
250.89
250.35
250.78
249.88
249.74
249.66
249.62
249.55
2
249.60
249.88
249.78
250.94
251.34
250.38
250.48
249.87
249.75
249.66
249.62
249.55
3
249.59
250.08
249.77
250.93
251.40
250.29
250.36
249.86
249.74
249.66
249.62
249.55
4
249.57
250.00
249.81
250.92
250.85
250.39
250.28
249.85
249.74
249.65
249.62
249.55
5
249.57
249.92
249.86
250.72
250.66
250.42
250.23
249.85
249.74
249.68
249.61
249.55
6
249.56
250.14
250.17
250.34
250.77
250.43
250.18
249.84
249.74
249.67
249.60
249.54
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
249.75
249.86
250.14
250.23
252.08
250.61
250.14
249.84
249.73
249.66
249.59
249.54
8
249.82
249.77
250.90
250.16
251.35
252.07
250.14
249.83
249.73
249.66
249.58
249.53
9
249.81
249.77
250.16
250.10
251.02
252.20
250.09
249.83
249.73
249.65
249.58
249.53
10
249.81
249.87
249.94
250.77
251.05
251.12
250.07
249.83
249.72
249.65
249.58
249.53
11
249.75
250.52
249.82
250.20
250.91
250.73
250.06
249.83
249.72
249.65
249.58
249.52
12
249.72
249.86
249.81
250.23
251.09
250.60
250.02
249.84
249.72
249.65
249.58
249.54
13
249.75
249.79
249.79
251.04
251.11
250.51
250.01
249.82
249.71
249.65
249.58
249.54
14
249.79
249.79
249.83
252.11
250.83
250.49
249.99
249.80
249.71
249.65
249.57
249.57
15
249.74
249.76
249.78
251.58
250.72
250.41
249.98
249.79
249.71
249.67
249.57
249.58
16
249.71
249.96
249.76
252.23
250.59
250.63
250.06
249.79
249.71
249.65
249.57
249.55
17
249.75
250.75
249.79
251.51
250.76
250.66
249.99
249.79
249.70
249.65
249.57
249.54
18
249.67
250.42
249.82
251.13
250.61
252.69
249.99
249.79
249.69
249.64
249.57
249.53
19
249.67
250.01
249.80
250.88
250.74
251.35
249.99
249.78
249.69
249.64
249.57
249.52
20
249.66
249.94
249.79
251.52
251.09
251.02
249.98
249.78
249.69
249.64
249.56
249.52
21
249.66
251.00
249.77
250.91
251.26
251.22
249.98
249.77
249.68
249.64
249.56
249.52
22
249.64
249.95
249.73
250.93
251.30
251.17
249.96
249.76
249.68
249.64
249.56
249.52
23
249.65
249.84
249.74
250.67
251.26
250.89
249.93
249.76
249.68
249.63
249.56
249.51
24
249.89
250.08
249.73
251.26
250.95
250.75
249.92
249.75
249.68
249.64
249.55
249.51
25
249.84
250.38
249.94
250.85
250.82
250.64
249.92
249.75
249.68
249.63
249.55
249.51
26
249.81
249.94
253.44
250.60
250.72
250.71
249.92
249.75
249.68
249.62
249.55
249.50
27
249.67
249.84
253.34
250.46
250.86
250.57
249.90
249.75
249.68
249.62
249.55
249.52
28
249.65
249.79
252.30
250.45
250.52
250.49
249.89
249.75
249.68
249.62
249.55
249.50
29
249.65
249.80
251.56
250.36
250.47
250.41
249.88
249.75
249.67
249.62
249.55
249.49
30
249.94
249.95
250.94
250.29
250.43
250.34
249.88
249.74
249.67
249.62
249.49
31
249.82
250.69
250.42
249.89
249.67
249.62
249.49
----------
--------------
Mean
249.71
250.01
250.29
250.86
250.93
250.82
250.06
249.80
249.71
249.64
249.58
249.53
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Max
249.94
251.00
253.44
252.23
252.08
252.69
250.78
249.88
249.75
249.68
249.62
249.58
253.44
Min
249.56
249.76
249.73
250.10
250.42
250.29
249.88
249.74
249.67
249.62
249.55
249.49
249.49
254.08
m. (MSL.) ,
248.89
m. (MSL.) ,
River Bed 249.08
m. (MSL.) ,
256.71
m. (MSL.) ,
256.70
m. (MSL.) ,
Drainage Area 621 Square Kilometers
at 19.00 Hours , on Jun 26 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation