Basic HTML Version
110
Location : on right bank at the bridge.
3,359
sq.km.
Amphoe
Selaphum
Changwat
Roi Et
Ban
Tha Ngam
WATER YEAR : 2011
CHI RIVER BASIN
Lam Nam Yang at Ban Tha Ngam , Roi Et (E.92)
Lat 16 - 06 - 34 N Long 104 - 00 - 40 E
Drainge Area
Staff gage
+124.500 m. (MSL.)
B.M.- Highways Dept.
On right bank at the footpath of the bridge.
Elevation
3-time daily readings at 06.00, 12.00 and 18.00 hours.
Arithmetic means of 3 readings
2007 to date
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+136.964 m. (MSL.)
Type of Gage
Bench Mark
Location BM
Rating Operation
Period of Available Gage Records
2007 to date
-
2007 to date
Fairly stable because of backwater effect.
Overbank flow starts at elevation +133.310 m.(MSL.), records are channel flow only.
Records good. Stage-discharge relation defined by 31 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
125.54
125.26
126.36
129.55
132.34
132.46
131.42
128.62
128.80
129.40
129.60
128.64
2
125.54
125.51
126.35
129.46
133.08
133.54
131.47
128.52
129.00
129.38
129.55
128.60
3
125.54
125.54
126.35
129.71
133.44
133.54
131.80
128.44
129.19
129.37
129.55
128.72
4
125.54
125.58
126.34
130.39
133.66
133.87
132.03
128.40
129.32
129.36
129.53
128.69
5
125.54
125.61
126.39
130.76
133.82
133.87
132.10
128.34
129.43
129.35
129.49
128.76
6
125.54
125.64
126.59
130.56
133.17
134.26
131.74
128.24
129.51
129.34
129.44
128.73
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
125.54
125.65
126.97
130.22
132.48
134.42
131.26
128.20
129.55
129.33
129.40
128.73
8
125.54
125.66
127.64
129.97
132.86
134.47
130.85
128.18
129.54
129.33
129.38
128.74
9
125.53
125.67
128.16
130.05
133.71
134.47
130.52
128.14
129.54
129.31
129.36
128.75
10
125.53
125.67
128.52
130.51
134.51
134.60
130.23
128.09
129.53
129.30
129.30
128.77
11
125.53
125.70
128.86
130.88
135.04
134.81
129.95
127.99
129.53
129.29
129.26
128.79
12
125.53
125.75
128.93
130.60
135.19
134.92
130.05
127.95
129.53
129.28
129.19
128.79
13
125.53
125.77
129.11
129.62
135.11
134.94
130.66
127.92
129.52
129.27
129.15
128.75
14
125.52
125.79
129.33
129.15
134.87
134.86
131.29
127.87
129.51
129.26
129.14
128.72
15
125.52
125.80
129.68
129.82
134.33
134.71
132.71
127.72
129.51
129.26
129.09
128.71
16
125.51
125.82
129.86
130.45
134.26
134.56
133.01
127.63
129.50
129.26
129.04
128.70
17
125.01
125.86
130.01
129.86
133.91
134.42
133.01
127.54
129.50
129.25
128.99
128.70
18
124.58
125.91
130.10
129.66
134.23
134.03
132.68
127.50
129.50
129.25
128.97
128.72
19
124.57
125.97
130.15
130.30
134.57
133.52
132.20
127.48
129.50
129.27
128.94
128.80
20
124.56
125.98
130.24
131.09
135.01
133.16
131.61
127.44
129.47
129.33
128.89
128.88
21
124.56
125.94
130.34
131.98
135.30
133.33
131.03
127.38
129.45
129.40
128.85
128.95
22
124.65
125.93
130.32
132.78
135.42
133.34
130.69
127.29
129.45
129.60
128.84
128.98
23
124.89
126.03
130.22
133.34
135.27
132.75
130.40
127.21
129.45
129.95
128.82
129.00
24
125.08
126.24
129.94
133.70
134.97
132.68
130.09
127.13
129.42
129.87
128.80
129.00
25
125.13
126.23
129.85
133.73
134.51
132.68
129.89
127.07
129.41
129.78
128.78
129.00
26
125.17
126.17
129.79
134.04
133.78
132.61
129.66
127.08
129.40
129.74
128.75
129.00
27
125.18
126.22
129.74
134.33
133.30
132.07
129.54
127.60
129.40
129.95
128.72
129.00
28
125.18
126.30
129.69
134.13
133.38
131.89
129.26
128.01
129.40
129.95
128.70
128.99
29
125.17
126.34
129.65
133.70
133.04
131.84
129.13
128.31
129.40
129.95
128.68
128.94
30
125.17
126.35
129.60
133.12
132.77
131.74
129.02
128.58
129.40
129.87
128.90
31
126.35
132.47
132.48
128.83
129.40
129.61
128.88
----------
--------------
Mean
125.25
125.88
128.84
131.29
133.99
133.61
130.91
127.86
129.42
129.48
129.11
128.82
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Max
125.54
126.35
130.34
134.33
135.42
134.94
133.01
128.62
129.55
129.95
129.60
129.00
135.42
Min
124.56
125.26
126.34
129.15
132.34
131.74
128.83
127.07
128.80
129.25
128.68
128.60
124.56
135.44
m. (MSL.) ,
124.50
m. (MSL.) ,
River Bed 125.00
m. (MSL)
133.60
m. (MSL.) ,
136.61
m. (MSL.) ,
Drainage Area 3359 Square Kilometers
at 05.00 Hours, on Aug 22, 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Right Bank Elevation
Left Bank Elevation