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Location : on right bank about 800 meters upstream from E.20 station.
47,800 sq.km.
Amphoe
Maha Chana Chai
Changwat
Yasothon
Ban
Maha Chana Chai
WATER YEAR : 2011
CHI RIVER BASIN
Chi River at Maha Chana Chai , Yasothon (E.20A)
Lat 15 - 31 - 22 N Long 104 - 15 - 13 E
Drainge Area
Staff gage
+112.000 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
1973 to date
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+126.610 m. (MSL.)
Type of Gage
Bench Mark
Location BM
Rating Operation
Period of Available Gage Records
1974 to date
-
1974 to date
Fairly stable.
Overbank flow starts at elevation +119.310 m.(MSL.), records are channel flow only.
Records fair. Tat Noi barrage situated downstream from the gage site.
Stage-discharge relation defined by 29 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
116.09
116.37
116.91
116.14
119.63
122.37
122.78
122.72
121.62
116.83
116.68
116.56
2
116.16
116.30
116.69
116.36
119.76
122.28
122.76
122.71
121.51
116.86
116.48
116.94
3
116.20
116.18
116.49
116.37
119.85
122.32
122.74
122.68
121.36
116.90
116.36
116.65
4
116.20
116.19
116.43
116.36
119.91
122.26
122.72
122.66
121.19
116.97
116.44
116.73
5
116.22
116.27
116.48
116.42
119.96
122.18
122.70
122.62
120.71
116.95
116.30
116.34
6
116.14
116.28
116.55
116.53
120.02
122.15
122.69
122.59
120.25
116.72
116.39
116.21
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
115.99
116.30
116.78
116.68
120.05
122.17
122.68
122.55
119.68
116.57
116.55
116.39
8
115.99
116.31
116.96
116.75
120.10
122.16
122.67
122.52
119.02
116.55
116.56
116.53
9
116.12
116.46
117.48
116.66
120.14
122.19
122.67
122.49
118.26
116.65
116.52
116.48
10
116.26
116.48
117.80
116.50
120.18
122.24
122.66
122.45
117.31
116.70
116.48
116.52
11
116.31
116.40
117.96
116.43
120.26
122.32
122.65
122.42
117.42
116.57
116.36
116.61
12
116.29
116.26
117.89
116.63
120.37
122.43
122.64
122.38
117.59
116.50
116.28
116.71
13
116.32
116.17
117.82
116.55
120.47
122.54
122.62
122.34
117.53
116.50
116.41
116.74
14
116.39
116.21
117.85
116.78
120.65
122.66
122.65
122.30
117.42
116.52
116.21
116.55
15
116.31
116.39
117.76
117.06
120.85
122.79
122.67
122.26
117.38
116.66
115.94
116.36
16
116.13
116.76
117.72
117.39
121.05
122.88
122.71
122.22
117.35
116.63
115.92
116.23
17
116.07
116.94
117.67
117.72
121.22
122.95
122.70
122.18
117.31
116.61
116.29
116.27
18
116.20
116.85
117.51
117.96
121.38
122.99
122.70
122.13
117.21
116.55
116.54
116.35
19
116.26
116.75
117.26
118.04
121.56
123.02
122.75
122.09
117.17
116.62
116.60
116.41
20
116.26
116.72
117.10
118.03
121.70
123.08
122.79
122.06
117.15
116.78
116.69
116.50
21
116.23
116.68
116.99
118.00
121.81
123.07
122.83
122.03
117.09
116.87
116.65
116.43
22
116.12
116.69
117.09
117.88
121.88
123.05
122.86
121.99
116.88
117.27
116.63
116.37
23
116.08
116.71
117.08
117.70
121.93
123.00
122.88
121.95
116.73
117.80
116.58
116.26
24
116.08
116.73
117.00
117.69
121.99
122.95
122.88
121.93
116.70
118.16
116.54
116.26
25
116.16
116.80
116.80
117.93
122.11
122.89
122.88
121.91
116.78
118.32
116.47
116.39
26
116.22
116.93
116.60
118.21
122.28
122.86
122.85
121.88
116.73
118.15
116.48
116.31
27
116.16
116.81
116.41
118.38
122.40
122.84
122.82
121.84
116.53
117.77
116.60
116.33
28
116.01
116.68
116.25
118.64
122.50
122.84
122.78
121.81
116.37
117.35
116.61
116.47
29
115.96
116.89
116.14
118.97
122.53
122.82
122.78
121.77
116.02
117.09
116.52
116.27
30
116.02
116.93
115.98
119.30
122.50
122.80
122.76
121.70
116.07
116.89
116.39
31
116.96
119.48
122.46
122.73
116.50
116.79
116.28
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--------------
Mean
116.17
116.56
117.05
117.40
121.08
122.64
122.74
122.24
117.96
116.97
116.45
116.45
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Max
116.39
116.96
117.96
119.48
122.53
123.08
122.88
122.72
121.62
118.32
116.69
116.94
123.08
Min
115.96
116.17
115.98
116.14
119.63
122.15
122.62
121.70
116.02
116.50
115.92
116.21
115.92
123.09
m. (MSL.) ,
112.00
m. (MSL.) ,
River Bed 111.15
m. (MSL)
119.31
m. (MSL.) ,
126.93
m. (MSL.) ,
Drainage Area 47800 Square Kilometers
at 10.00 Hours, on Sep 20, 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Right Bank Elevation
Left Bank Elevation