Basic HTML Version
412
Location : on left bank at the bridge.
2,170
sq.km.
WATER YEAR : 2011
NAN RIVER BASIN
Nam Wa at Tha Li Bridge , Nan (N.75)
Lat 18 - 33 - 00 N Long 100 - 48 - 41 E
Amphoe
Wiang Sa
Changwat
Nan
Ban
Tha Li Bridge
Drainge Area
Staff gage
+182.805 m. (MSL.)
B.M.- H.D.
On left bank at the approach of the bridge.
Elevation
3-time daily readings at 06.00, 12.00 and 18.00 hours.
Arithmetic means of 3 readings
2006 to date
+196.616 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
2006 to date
-
2006 to date
Fairly stable.
No overbank flow.
Records good. Stage-discharge relation defined by 46 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
184.15
184.39
184.53
188.07
189.32
186.99
188.10
185.24
184.67
184.46
184.31
184.22
2
184.14
184.43
184.51
188.06
189.08
187.61
187.57
185.22
184.66
184.45
184.31
184.21
3
184.14
184.40
184.56
187.33
188.47
187.45
187.61
185.18
184.65
184.44
184.31
184.20
4
184.13
184.39
184.66
186.89
188.06
187.43
187.08
185.13
184.65
184.44
184.31
184.20
5
184.02
184.40
184.84
186.48
187.42
187.55
186.83
185.14
184.64
184.44
184.31
184.19
6
184.19
184.46
185.84
186.26
187.19
189.02
186.64
185.08
184.63
184.44
184.31
184.19
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
184.19
184.52
186.69
186.13
187.23
188.52
186.47
185.07
184.60
184.43
184.31
184.19
8
184.27
184.56
186.20
185.93
187.43
188.40
186.43
185.07
184.61
184.42
184.28
184.19
9
184.34
184.53
185.53
185.84
187.55
187.97
186.35
185.07
184.62
184.42
184.25
184.20
10
184.37
184.52
185.13
187.25
187.58
187.63
186.24
185.05
184.63
184.42
184.24
184.23
11
184.37
184.52
185.03
186.69
189.33
187.50
186.20
185.02
184.64
184.41
184.23
184.31
12
184.36
184.52
184.92
186.51
188.69
186.89
186.06
185.01
184.64
184.41
184.27
184.34
13
184.35
184.57
185.28
186.83
188.24
186.72
186.02
184.97
184.64
184.42
184.30
184.25
14
184.23
184.60
185.05
188.08
187.24
186.82
186.00
184.95
184.63
184.44
184.31
184.19
15
184.18
184.78
184.84
188.79
187.38
187.36
186.00
184.93
184.62
184.45
184.31
184.18
16
184.15
184.79
184.72
189.07
187.03
187.88
185.92
184.91
184.61
184.46
184.29
184.26
17
184.14
184.92
184.72
189.06
187.29
187.94
185.82
184.91
184.60
184.46
184.28
184.37
18
184.13
185.99
184.70
188.21
187.57
188.11
185.73
184.89
184.58
184.43
184.27
184.25
19
184.12
185.42
184.69
187.50
187.67
188.02
185.99
184.84
184.57
184.41
184.26
184.21
20
184.12
185.53
184.67
187.38
188.99
188.48
185.95
184.82
184.56
184.40
184.25
184.20
21
184.11
185.43
184.65
187.72
188.86
188.40
185.89
184.81
184.56
184.40
184.24
184.18
22
184.11
185.00
184.74
187.43
188.86
188.33
185.51
184.81
184.55
184.38
184.24
184.17
23
184.12
184.79
184.64
187.30
188.70
187.97
185.50
184.79
184.53
184.35
184.24
184.17
24
184.43
184.74
184.59
187.18
188.39
187.75
185.45
184.78
184.52
184.35
184.24
184.17
25
184.42
184.50
185.22
187.12
188.16
187.64
185.37
184.77
184.51
184.34
184.23
184.16
26
184.31
184.58
189.32
186.86
188.14
187.49
185.35
184.76
184.50
184.34
184.23
184.16
27
184.19
184.55
193.35
186.72
188.30
187.48
185.30
184.74
184.49
184.34
184.23
184.16
28
184.14
184.63
188.60
186.86
188.20
187.13
185.28
184.74
184.49
184.34
184.23
184.16
29
184.14
184.78
189.61
186.77
188.06
186.88
185.27
184.73
184.48
184.33
184.23
184.16
30
184.14
184.69
188.22
186.47
188.45
187.00
185.27
184.73
184.48
184.32
184.16
31
184.62
188.48
187.28
185.26
184.47
184.32
184.16
----------
--------------
Mean
184.21
184.73
185.80
187.27
188.07
187.68
186.08
184.94
184.58
184.40
184.27
184.21
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Max
184.43
185.99
193.35
189.07
189.33
189.02
188.10
185.24
184.67
184.46
184.31
184.37
193.35
Min
184.02
184.39
184.51
185.84
187.03
186.72
185.26
184.73
184.47
184.32
184.23
184.16
184.02
195.01
m. (MSL.) ,
182.80
m. (MSL.) ,
River Bed 180.93
m. (MSL)
196.56
m. (MSL.) ,
196.48
m. (MSL.) ,
Drainage Area 2170 Square Kilometers
at 10.00 Hours , on Jun 27 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation