Basic HTML Version
82
Location : on right bank at the bridge.
31,879 sq.km.
Amphoe
Chang Han
Changwat
Roi Et
Ban
Muang Lat
WATER YEAR : 2011
CHI RIVER BASIN
Chi River at Ban Muang Lat , Roi Et (E.66A)
Lat 16 - 12 - 08 N Long 103 - 31 - 41 E
Drainge Area
Staff gage
+126.900 m. (MSL.)
B.M.- Highways Dept.
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
1999 to date
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+143.406 m. (MSL.)
Type of Gage
Bench Mark
Location BM
Rating Operation
Period of Available Gage Records
1999 to date
-
1999 to date
Fairly stable because of backwater effect.
Overbank flow starts at elevation +138.610 m.(MSL.) , records are channel flow only.
Records fair. Stage-discharge relation defined by 30 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
130.94
130.97
131.32
131.30
133.50
136.69
139.40
139.92
133.81
131.55
131.28
131.32
2
130.95
130.95
131.45
131.43
133.51
136.77
139.43
139.82
133.28
131.69
131.33
130.83
3
130.93
131.03
131.66
131.55
133.57
136.89
139.46
139.77
132.61
131.54
131.42
130.51
4
130.71
131.06
132.00
131.62
133.63
137.00
139.49
139.70
132.25
131.38
131.48
130.82
5
130.65
131.12
132.16
131.45
133.73
137.09
139.52
139.64
132.10
131.44
131.49
131.30
6
130.70
131.04
132.39
131.45
133.79
137.19
139.55
139.58
132.18
131.42
131.44
131.56
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
130.84
130.81
133.02
131.45
133.77
137.29
139.62
139.52
132.00
131.37
131.37
131.70
8
131.11
130.66
133.49
131.49
133.76
137.40
139.70
139.45
132.11
131.30
131.26
131.67
9
131.27
130.43
133.75
131.54
133.76
137.49
139.79
139.39
132.30
131.28
131.19
131.60
10
131.26
130.30
133.72
131.50
133.80
137.69
139.88
139.33
132.13
131.35
131.28
131.61
11
131.29
130.53
133.68
131.47
133.96
137.87
139.96
139.27
132.01
131.38
131.31
131.65
12
131.25
130.62
133.65
131.82
134.23
138.01
140.05
139.20
132.07
131.34
131.22
131.42
13
131.18
130.93
133.64
132.23
134.42
138.13
140.14
139.13
132.22
131.31
131.22
131.27
14
131.18
131.52
133.40
132.67
134.43
138.25
140.21
139.07
132.21
131.18
131.14
131.31
15
131.22
131.37
133.22
132.80
134.46
138.39
140.24
139.01
132.11
131.16
131.20
131.28
16
131.21
131.06
132.77
132.97
134.54
138.53
140.26
138.94
132.04
131.32
131.27
131.27
17
131.15
130.97
132.47
132.95
134.52
138.62
140.30
138.88
131.97
131.45
131.31
131.36
18
131.05
130.96
132.21
132.93
134.88
138.67
140.34
138.78
131.88
131.43
131.29
131.44
19
130.96
131.05
132.31
132.79
135.02
138.72
140.42
138.66
131.70
131.67
131.27
131.57
20
130.86
131.04
132.31
132.58
135.26
138.77
140.47
138.52
131.53
132.19
131.14
131.56
21
130.80
131.02
132.11
132.25
135.54
138.87
140.33
138.33
131.62
132.59
131.09
131.38
22
130.63
131.00
131.95
132.22
135.81
138.98
140.26
138.06
131.53
133.16
131.23
131.38
23
130.60
131.18
131.84
132.09
136.22
139.10
140.27
137.73
131.35
133.34
131.30
131.39
24
130.56
131.26
131.62
132.03
136.16
139.24
140.29
137.29
131.10
132.78
131.33
131.25
25
130.34
131.17
131.42
132.21
136.23
139.29
140.28
136.74
131.36
132.50
131.33
131.22
26
130.14
131.19
131.20
132.39
136.26
139.33
140.24
136.07
130.77
132.26
131.23
131.34
27
130.24
131.27
131.03
132.65
136.29
139.34
140.19
135.07
131.16
132.40
131.27
131.34
28
130.50
131.67
131.17
132.93
136.33
139.35
140.14
134.82
131.48
132.05
131.53
130.98
29
130.55
131.73
131.42
133.17
136.41
139.36
140.08
134.44
131.41
131.78
131.56
130.84
30
130.59
131.56
131.36
133.29
136.52
139.38
140.04
133.99
131.37
131.50
130.87
31
131.41
133.52
136.61
139.99
131.40
131.18
130.90
----------
--------------
Mean
130.86
131.06
132.32
132.22
134.87
138.26
140.01
138.27
131.91
131.75
131.30
131.29
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Max
131.29
131.73
133.75
133.52
136.61
139.38
140.47
139.92
133.81
133.34
131.56
131.70
140.47
Min
130.14
130.30
131.03
131.30
133.50
136.69
139.40
133.99
130.77
131.16
131.09
130.51
130.14
140.50
m. (MSL.) ,
126.90
m. (MSL.) ,
River Bed 127.15
m. (MSL)
138.60
m. (MSL.) ,
139.07
m. (MSL.) ,
Drainage Area 31879 Square Kilometers
at 06.00 Hours, on Oct 20, 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Right Bank Elevation
Left Bank Elevation