Basic HTML Version
366
Location : on right bank at Ban Ngiu Ngam.
10,174 sq.km.
WATER YEAR : 2011
NAN RIVER BASIN
Nan River at Ban Ngiu Ngam , Nan (N.13B)
Lat 18 - 19 - 49 N Long 100 - 54 - 00 E
Amphoe
Wiang Sa
Changwat
Nan
Ban
Ngiu Ngam
Drainge Area
Staff gage.
+173.852 m. (MSL.)
B.M.-H.D.
On right bank at the abutment of the bridge.
Elevation
3-time daily readings at 06.00, 12.00 and 18.00 hours.
Arithmetic means of 3 readings
2011 to date
+187.055 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
2011 to date
-
2011 to date
Stable.
Overbank flow starts at elevation +183.450 m.(MSL.) and is including overbank flow.
Records good. Stage-discharge relation defined by 10 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
3.40
177.47
178.51
182.00
184.44
180.88
180.97
178.84
178.09
177.85
177.73
177.60
2
3.34
177.90
178.35
181.89
183.91
181.43
182.05
178.70
178.08
177.84
177.73
177.60
3
3.29
178.06
178.30
181.03
183.52
180.63
181.57
178.63
178.07
177.84
177.75
177.59
4
3.28
177.88
178.23
180.57
182.57
180.32
180.93
178.59
178.07
177.82
177.73
177.59
5
3.27
178.25
178.38
180.26
181.70
181.58
180.49
178.61
178.06
177.82
177.73
177.58
6
3.19
177.99
178.30
179.86
181.07
182.85
180.19
178.56
178.03
177.83
177.72
177.58
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
3.18
178.46
180.35
179.59
182.13
182.27
179.98
178.50
178.01
177.82
177.70
177.58
8
3.30
178.36
179.43
179.25
183.50
182.54
179.89
178.48
178.00
177.81
177.69
177.57
9
3.74
177.92
178.95
179.37
182.56
183.03
179.82
178.46
178.00
177.79
177.69
177.57
10
3.52
178.04
178.73
180.41
182.23
182.29
179.73
178.59
178.00
177.80
177.68
177.57
11
3.47
178.42
178.43
181.03
183.00
181.46
179.64
178.55
178.00
177.79
177.67
177.61
12
3.39
178.85
178.26
180.42
183.36
181.02
179.44
178.44
178.00
177.79
177.66
177.62
13
3.51
178.22
178.48
179.80
182.62
180.89
179.45
178.39
177.99
177.79
177.67
177.60
14
3.51
178.08
178.33
180.98
181.98
180.77
179.40
178.37
177.97
177.80
177.68
177.58
15
3.55
178.37
178.30
184.04
181.42
180.87
179.49
178.34
177.96
177.80
177.66
177.59
16
3.39
178.51
178.27
184.48
181.01
181.26
179.43
178.31
177.95
177.79
177.67
177.66
17
3.30
178.79
178.21
184.69
181.39
181.44
179.44
178.30
177.94
177.79
177.66
177.71
18
3.26
179.36
178.18
183.91
182.68
181.32
179.28
178.28
177.94
177.80
177.66
177.64
19
3.24
179.72
178.17
182.13
181.89
183.04
179.22
178.27
177.93
177.78
177.65
177.59
20
3.26
179.59
178.21
181.63
183.95
183.07
179.05
178.25
177.93
177.78
177.65
177.58
21
3.21
179.33
178.23
182.16
184.99
182.70
178.98
178.23
177.92
177.76
177.63
177.55
22
3.20
179.05
178.21
181.78
185.08
183.26
178.92
178.21
177.90
177.75
177.63
177.54
23
3.25
178.53
178.16
181.64
184.56
182.23
178.87
178.19
177.89
177.74
177.62
177.54
24
3.37
178.24
178.09
181.25
183.49
181.93
178.82
178.19
177.89
177.74
177.61
177.53
25
3.61
178.40
178.46
182.09
182.45
181.35
178.76
178.18
177.88
177.73
177.61
177.52
26
3.72
178.80
185.63
181.11
182.59
181.19
178.74
178.16
177.87
177.73
177.61
177.51
27
3.68
178.49
187.50
180.58
182.11
181.52
178.72
178.14
177.85
177.73
177.60
177.51
28
3.64
178.47
187.31
180.80
182.29
181.11
178.71
178.13
177.85
177.72
177.60
177.51
29
3.59
178.69
186.57
180.92
181.79
180.84
178.67
178.12
177.86
177.72
177.59
177.51
30
3.67
178.71
184.23
180.19
181.02
180.59
178.70
178.11
177.86
177.71
177.52
31
178.93
183.47
181.22
178.99
177.85
177.71
177.54
----------
--------------
Mean
3.41
178.51
179.76
181.40
182.66
181.66
179.56
178.37
177.96
177.78
177.66
177.57
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Max
3.74
179.72
187.50
184.69
185.08
183.26
182.05
178.84
178.09
177.85
177.75
177.71
187.50
Min
3.18
177.47
178.09
179.25
181.01
180.32
178.67
178.11
177.85
177.71
177.59
177.51
3.18
187.57
m. (MSL.) ,
173.85
m. (MSL.) ,
River Bed 174.20
m. (MSL)
185.79
m. (MSL.) ,
183.44
m. (MSL.) ,
Drainage Area 10174 Square Kilometers
at 03.00 Hours , on Jun 27 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation