Basic HTML Version
2
Location : on left bank at Ban Tha Pong Daeng.
4,470
sq.km.
WATER YEAR : 2011
SALAWIN RIVER BASIN
Nam Mae Pai at Ban Tha Pong Daeng , Mae Hong Son (Sw.5A)
Lat 19 - 16 - 06 N Long 97 - 56 - 55 E
Amphoe
Mueang
Changwat
Mae Hong Son
Ban
Tha Pong Daeng
Drainge Area
Staff gage
+175.757 m. (MSL.)
B.M.-H.D.
On left bank near the station office.
Elevation
3-time daily readings at 06.00, 12.00 and 18.00 hours.
Arithmetic means of 3 readings
1980 to date
+187.423 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
1984 to date
-
1984 to date
Fairly stable.
No overbank flow.
Records good. Stage-discharge relation defined by 203 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
175.44
176.00
175.75
175.92
179.45
178.47
177.57
176.56
175.90
175.69
175.58
175.51
2
175.43
175.96
175.68
175.93
178.41
178.05
178.78
176.50
175.88
175.70
175.60
175.51
3
175.43
176.07
175.92
176.07
177.61
178.21
178.21
176.62
175.88
175.69
175.60
175.50
4
175.43
176.10
176.00
176.26
177.28
177.93
177.68
176.48
175.86
175.69
175.59
175.49
5
175.42
175.87
176.03
176.20
177.17
177.86
177.50
176.50
175.86
175.68
175.58
175.49
6
175.44
176.19
177.32
176.05
177.18
178.89
177.37
176.41
175.85
175.68
175.58
175.50
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
175.44
175.91
176.55
176.02
177.10
179.21
177.28
176.38
175.84
175.67
175.57
175.49
8
175.42
175.80
176.15
175.93
177.09
178.48
177.20
176.36
175.82
175.67
175.57
175.49
9
175.41
175.73
176.02
175.93
177.34
178.30
177.17
176.32
175.82
175.66
175.56
175.50
10
175.41
175.87
175.94
176.60
177.25
178.16
177.14
176.30
175.81
175.66
175.56
175.50
11
175.45
175.91
175.98
176.53
177.58
177.94
177.12
176.29
175.80
175.66
175.55
175.49
12
175.48
175.77
175.92
176.33
178.32
177.74
177.02
176.25
175.80
175.65
175.55
175.49
13
175.62
175.70
175.96
176.20
178.06
177.85
177.07
176.22
175.80
175.65
175.55
175.50
14
175.81
175.73
175.96
176.12
177.68
178.83
176.93
176.20
175.79
175.65
175.55
175.52
15
175.61
175.72
175.95
176.18
177.47
178.30
176.91
176.18
175.78
175.71
175.55
175.50
16
175.51
175.69
175.92
177.19
177.48
178.06
176.98
176.16
175.77
175.67
175.54
175.50
17
175.47
175.81
175.89
177.32
177.74
177.81
177.07
176.14
175.77
175.65
175.54
175.50
18
175.47
175.99
175.95
176.83
177.92
177.63
176.93
176.12
175.77
175.65
175.54
175.49
19
175.58
176.33
175.95
176.71
177.93
177.62
176.85
176.10
175.76
175.64
175.53
175.49
20
175.60
176.18
175.91
176.80
178.24
177.76
176.77
176.08
175.75
175.62
175.54
175.50
21
175.57
175.97
176.04
177.00
178.02
177.70
176.73
176.06
175.75
175.62
175.54
175.50
22
175.56
175.86
176.00
177.02
178.09
177.92
176.70
176.03
175.75
175.62
175.53
175.50
23
175.56
175.78
175.90
177.02
177.83
177.66
176.66
176.02
175.73
175.62
175.53
175.50
24
176.10
175.71
175.84
177.17
177.58
177.55
176.64
176.01
175.72
175.61
175.52
175.49
25
176.18
175.68
175.94
177.23
177.69
177.50
176.61
175.99
175.71
175.61
175.52
175.50
26
176.04
175.66
176.01
176.92
178.75
177.37
176.58
175.99
175.71
175.61
175.51
175.50
27
175.80
175.67
176.16
176.73
178.28
177.53
176.60
175.96
175.71
175.60
175.51
175.50
28
175.68
175.75
176.16
176.63
178.15
178.32
176.57
175.94
175.70
175.60
175.51
175.49
29
175.78
175.77
176.11
176.55
177.73
178.58
176.61
175.92
175.70
175.59
175.51
175.50
30
175.76
175.90
176.02
176.45
177.86
177.78
176.61
175.91
175.70
175.58
175.49
31
175.87
176.62
177.84
176.80
175.70
175.58
175.49
----------
--------------
Mean
175.60
175.87
176.03
176.53
177.81
178.03
177.05
176.20
175.78
175.64
175.55
175.50
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Max
176.18
176.33
177.32
177.32
179.45
179.21
178.78
176.62
175.90
175.71
175.60
175.52
179.45
Min
175.41
175.66
175.68
175.92
177.09
177.37
176.57
175.91
175.70
175.58
175.51
175.49
175.41
180.86
m. (MSL.) ,
175.76
m. (MSL.) ,
River Bed 174.53
m. (MSL)
183.87
m. (MSL.) ,
181.48
m. (MSL.) ,
Drainage Area 4470 Square Kilometers
at 19.00 Hours , on Aug 1 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation