Basic HTML Version
314
Location : on right bank downstream of the bridge of Pong - Chiang Muan road.
1,981
sq.km.
WATER YEAR : 2012
YOM RIVER BASIN
Yom River at Ban Thung Nong , Phayao (Y.31)
Lat 18 - 57 - 28 N Long 100 - 15 - 58 E
Amphoe
Chiang Muan
Changwat
Phayao
Ban
Thung Nong
Drainge Area
Water - stage recorder
+257.000 m. (MSL.)
B.M.-H.D.
On right bank about 5 meters from the top staff gage.
Elevation
Recording
Arithmetic mean of 24 readings
1983 to date
+266.960 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
Fairly stable.
No overbank flow.
Records fair. Flow effected by the islet about 200 meters dowmstream from 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
257.98
258.17
258.44
258.04
258.65
259.22
259.24
258.52
258.77
258.03
258.20
258.02
2
258.04
258.10
258.70
258.04
258.57
259.30
259.12
258.45
258.81
257.99
258.11
258.01
3
258.07
258.07
259.28
258.10
258.75
260.30
258.98
258.36
258.69
258.01
258.06
258.00
4
258.08
258.04
258.71
258.37
258.90
260.99
259.20
258.36
258.51
258.00
258.05
258.02
5
258.15
258.01
258.85
259.15
258.68
260.84
259.28
258.45
258.38
258.01
258.02
258.03
6
258.38
258.35
259.27
258.66
258.59
260.46
260.22
258.58
258.33
258.01
258.00
258.04
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Gage Height in Meter (MSL.) Water Year April 1, 2012 to March 31, 2013
7
258.63
259.43
258.81
258.43
258.54
260.04
259.82
258.66
258.30
258.02
258.02
258.02
8
258.42
259.06
258.67
258.49
258.54
259.81
259.18
258.48
258.28
258.02
258.05
257.98
9
258.38
258.79
258.94
258.37
259.57
260.56
258.97
258.36
258.25
258.02
258.05
257.93
10
258.34
259.03
258.96
258.54
261.65
260.61
258.82
258.30
258.21
258.00
258.05
257.89
11
258.26
258.81
258.72
258.41
260.73
260.02
258.74
258.27
258.21
257.97
258.04
257.90
12
258.21
258.30
258.49
258.25
260.25
259.58
258.72
258.28
258.23
257.96
258.04
257.90
13
258.16
258.20
258.38
258.13
259.71
259.33
258.69
258.28
258.23
257.91
258.07
257.84
14
258.19
258.15
258.32
258.27
259.39
260.35
258.65
258.50
258.23
257.91
258.15
257.84
15
258.17
258.11
258.27
258.27
259.16
261.41
258.59
258.44
258.20
257.96
258.16
257.84
16
258.07
258.12
258.24
258.16
259.13
260.20
258.55
258.32
258.18
257.97
258.14
257.84
17
258.04
258.17
258.23
258.11
259.02
259.63
258.53
258.26
258.18
257.92
258.17
257.86
18
258.02
258.25
258.18
258.21
258.86
259.30
258.62
258.23
258.17
257.97
258.22
257.87
19
258.01
258.15
258.16
258.33
258.93
259.15
258.60
258.21
258.15
257.96
258.25
257.86
20
257.98
258.15
258.14
258.27
258.82
259.25
258.54
258.20
258.14
257.95
258.19
257.86
21
257.97
258.17
258.11
258.27
259.81
259.37
258.50
258.20
258.15
257.95
258.09
257.84
22
257.97
258.14
258.12
258.32
260.41
259.12
258.44
258.25
258.14
257.95
258.14
257.83
23
257.99
258.11
258.11
258.25
259.42
259.19
258.46
258.24
258.12
257.95
258.20
257.82
24
257.99
258.21
258.12
260.33
259.68
259.11
258.54
258.24
258.12
257.95
258.16
257.80
25
257.97
258.22
258.19
262.28
260.07
259.00
258.46
258.26
258.12
257.95
258.12
257.80
26
257.97
259.61
258.14
260.46
259.67
258.81
258.41
258.23
258.12
257.94
258.11
257.83
27
257.98
261.53
258.09
259.52
259.73
259.34
258.39
258.20
258.11
257.94
258.05
257.80
28
258.24
260.55
258.04
259.18
259.81
259.91
258.37
258.69
258.10
257.93
258.00
257.78
29
258.22
259.29
258.06
259.06
259.73
260.15
258.36
259.82
258.08
257.96
257.78
30
258.25
258.80
258.04
258.86
259.86
259.70
258.34
258.91
258.07
257.98
257.76
31
258.57
258.72
259.44
258.40
258.06
258.13
257.78
----------
--------------
Mean
258.14
258.60
258.43
258.70
259.42
259.80
258.77
258.42
258.25
257.97
258.10
257.88
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Max
258.63
261.53
259.28
262.28
261.65
261.41
260.22
259.82
258.81
258.13
258.25
258.04
262.28
Min
257.97
258.01
258.04
258.04
258.54
258.81
258.34
258.20
258.06
257.91
258.00
257.76
257.76
262.72
m. (MSL.) ,
257.00
m. (MSL.) ,
River Bed 253.89
m. (MSL.)
267.61
m. (MSL.) ,
267.29
m. (MSL.) ,
Drainage Area 1981 Square Kilometers
at 11.00 Hours , on Jul 25 , 2012
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation