Basic HTML Version
320
Location : on left bank at the bridge.
853
sq.km.
WATER YEAR : 2012
YOM RIVER BASIN
Nam Khuan at Ban Pa Kha , Phayao (Y.36)
Lat 19 - 09 - 24 N Long 100 - 19 - 36 E
Drainge Area
Amphoe
Pong
Changwat
Phayao
Ban
Pa Kha
Staff gage
+298.586 m. (MSL.)
B.M.-H.D.
On left bank about 20 meters from the abutment of the bridge.
Elevation
3-time daily readings at 06.00, 12.00 and 18.00 hours.
Arithmetic mean of 3 readings
1998 to date
Rating Operation
Period of Available Gage Records
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+307.764 m. (MSL.)
Type of Gage
Bench Mark
Location BM
1998 to date
-
1998 to date
Fairly stable.
No overbank flow.
Records fair. Flow effected by the islet at the gage site.
Stage-discharge relation defined by 47 discharge measurements made in 2012.
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
300.49
300.27
300.59
300.34
300.59
300.89
301.06
300.59
300.63
300.39
300.58
300.48
2
300.49
300.16
300.59
300.34
300.59
301.35
300.99
300.59
300.60
300.41
300.57
300.48
3
300.49
300.09
300.66
300.35
300.63
301.81
300.99
300.56
300.60
300.43
300.53
300.49
4
300.52
300.09
300.59
300.61
300.69
301.92
300.99
300.69
300.57
300.46
300.49
300.51
5
300.59
300.09
300.59
301.08
300.63
301.62
300.99
300.70
300.54
300.48
300.47
300.51
6
300.58
300.22
300.59
301.09
300.59
301.37
301.53
300.59
300.51
300.50
300.46
300.51
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Gage Height in Meter (MSL.) Water Year April 1, 2012 to March 31, 2013
7
300.49
300.47
300.58
300.92
300.59
301.30
301.11
300.59
300.50
300.52
300.45
300.50
8
300.49
300.59
300.61
300.76
300.59
301.34
300.96
300.59
300.49
300.55
300.45
300.50
9
300.47
300.59
300.76
300.59
301.97
301.65
300.88
300.57
300.49
300.57
300.44
300.49
10
300.47
300.59
300.71
300.54
302.10
301.43
300.84
300.56
300.49
300.58
300.44
300.49
11
300.47
300.59
300.66
300.52
301.42
301.22
300.81
300.49
300.48
300.59
300.44
300.49
12
300.44
300.58
300.55
300.58
301.28
300.99
300.79
300.49
300.47
300.59
300.44
300.49
13
300.44
300.47
300.49
300.59
301.11
300.99
300.78
300.49
300.47
300.59
300.45
300.49
14
300.39
300.29
300.43
300.59
300.98
301.59
300.77
300.48
300.46
300.59
300.47
300.49
15
300.39
300.29
300.37
300.58
300.91
301.73
300.77
300.48
300.45
300.59
300.48
300.49
16
300.39
300.29
300.31
300.49
300.86
301.13
300.76
300.48
300.44
300.58
300.48
300.49
17
300.39
300.26
300.27
300.49
300.81
300.97
300.73
300.47
300.43
300.58
300.48
300.49
18
300.34
300.24
300.22
300.49
300.83
300.92
300.74
300.47
300.43
300.57
300.49
300.48
19
300.27
300.27
300.21
300.53
300.78
300.89
300.74
300.47
300.42
300.57
300.49
300.48
20
300.24
300.27
300.19
300.49
300.77
300.89
300.73
300.46
300.41
300.56
300.49
300.48
21
300.24
300.29
300.19
300.44
301.41
300.89
300.71
300.46
300.41
300.56
300.49
300.48
22
300.24
300.32
300.19
300.44
301.11
300.89
300.70
300.46
300.40
300.55
300.49
300.48
23
300.30
300.29
300.19
300.48
300.92
300.89
300.69
300.48
300.40
300.55
300.49
300.48
24
300.34
300.29
300.19
301.82
301.03
300.86
300.71
300.48
300.40
300.55
300.49
300.48
25
300.31
300.31
300.19
302.09
301.17
300.86
300.77
300.49
300.39
300.54
300.49
300.48
26
300.28
300.48
300.19
301.06
301.15
300.90
300.70
300.47
300.39
300.54
300.49
300.47
27
300.29
301.14
300.20
300.92
301.10
301.14
300.63
300.46
300.39
300.53
300.48
300.47
28
300.30
300.72
300.31
300.87
301.21
301.34
300.60
300.51
300.39
300.53
300.48
300.47
29
300.36
300.60
300.34
300.81
301.12
301.42
300.59
300.73
300.39
300.52
300.47
30
300.37
300.59
300.34
300.73
300.91
301.20
300.59
300.67
300.38
300.52
300.47
31
300.59
300.59
300.89
300.59
300.38
300.56
300.48
----------
--------------
Mean
300.40
300.40
300.41
300.72
300.99
301.21
300.81
300.53
300.46
300.54
300.48
300.49
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Max
300.59
301.14
300.76
302.09
302.10
301.92
301.53
300.73
300.63
300.59
300.58
300.51
302.10
Min
300.24
300.09
300.19
300.34
300.59
300.86
300.59
300.46
300.38
300.39
300.44
300.47
300.09
302.79
m. (MSL.) ,
298.59
m. (MSL.) ,
River Bed 298.94
m. (MSL.)
307.38
m. (MSL.) ,
307.40
m. (MSL.) ,
Drainage Area 853 Square Kilometers
at 18.00 Hours , on Aug 9 , 2012
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Right Bank Elevation
Left Bank Elevation