Basic HTML Version
48
Location : on left bank at the bridge of Chiang Rai - Phayao Highway, Tambon Bua Sali.
2,909
sq.km.
WATER YEAR : 2011
NAM MAE KOK RIVER BASIN
Nam Mae Lao at Ban Ton Yang , Chiang Rai (G.8)
Lat 19 - 47 - 32 N Long 99 - 45 - 11 E
Drainge Area
Amphoe
Mae Lao
Changwat
Chiang Rai
Ban
Ton Yang
Water - stage recorder
+405.100 m. (MSL.)
B.M.-H.D.
On left bank about 8 meters from the top staff gage.
Elevation
Recording
Arithmetic means of 24 readings
1994 to date
Rating Operation
Period of Available Gage Records
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+410.832 m. (MSL.)
Type of Gage
Bench Mark
Location BM
1994 to date
-
1994 to date
Fairly stable.
No overbank flow.
Records fair. Mae Lao weir situated about 10 kilometers above gage site.
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
404.99
405.53
405.73
405.68
406.28
407.06
407.95
406.54
406.11
405.41
405.15
405.14
2
405.00
405.82
405.51
405.63
407.09
407.22
407.74
406.48
406.10
405.35
405.17
405.12
3
405.00
406.02
405.47
405.62
407.75
407.06
407.45
406.45
406.10
405.35
405.23
405.11
4
405.00
406.22
405.46
405.57
407.65
406.99
407.25
406.44
406.10
405.35
405.26
405.11
5
405.00
406.06
405.46
405.59
406.88
406.97
407.12
406.42
406.08
405.33
405.22
405.13
6
405.01
406.29
405.71
405.49
406.43
406.96
406.97
406.38
406.08
405.40
405.19
405.13
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
405.03
405.97
405.83
405.29
406.32
407.03
406.80
406.35
406.07
405.30
405.16
405.12
8
405.03
405.74
405.69
405.17
406.63
406.94
406.74
406.32
406.07
405.23
405.15
405.12
9
405.03
405.66
405.55
405.11
406.42
406.88
406.82
406.32
406.07
405.21
405.14
405.11
10
405.01
405.89
405.45
405.10
406.33
406.78
406.79
406.36
406.05
405.18
405.13
405.11
11
405.01
406.19
405.34
405.06
406.62
406.74
406.72
406.30
406.03
405.16
405.12
405.12
12
405.01
406.34
405.30
405.21
407.13
406.59
406.64
406.28
406.01
405.15
405.11
405.20
13
405.04
406.03
405.30
405.27
407.70
407.18
406.55
406.28
406.00
405.16
405.10
405.53
14
405.18
405.76
405.30
405.20
407.46
408.38
406.48
406.27
406.00
405.24
405.10
405.51
15
405.05
405.68
405.29
405.73
407.04
408.60
406.45
406.26
406.00
405.45
405.10
405.53
16
405.03
405.69
405.25
406.44
406.66
408.01
406.55
406.25
405.99
405.40
405.09
405.50
17
405.02
405.77
405.05
406.65
406.65
407.47
406.72
406.24
405.99
405.33
405.10
405.44
18
405.02
405.88
405.13
406.89
406.69
407.23
406.65
406.24
405.97
405.30
405.12
405.36
19
405.06
406.18
405.13
406.42
406.70
407.24
406.73
406.23
405.95
405.26
405.11
405.28
20
405.22
406.40
405.04
406.05
406.93
407.42
406.68
406.23
405.94
405.22
405.11
405.27
21
405.17
406.32
405.21
406.31
407.34
407.52
406.63
406.21
405.93
405.19
405.11
405.24
22
405.11
405.99
405.17
406.10
407.41
407.42
406.54
406.19
405.83
405.17
405.11
405.21
23
405.09
405.77
405.08
405.78
407.24
407.24
406.36
406.19
405.80
405.16
405.10
405.18
24
405.10
405.75
405.05
405.85
406.91
407.18
406.28
406.18
405.76
405.15
405.09
405.22
25
405.18
405.63
405.06
406.19
406.84
407.28
406.28
406.16
405.72
405.15
405.10
405.20
26
405.53
405.69
405.70
406.11
407.62
407.15
406.25
406.18
405.70
405.15
405.14
405.15
27
405.56
406.07
406.65
405.79
407.64
407.18
406.20
406.18
405.72
405.17
405.14
405.14
28
405.51
405.73
406.70
405.76
408.30
407.47
406.24
406.16
405.71
405.14
405.13
405.17
29
405.40
405.68
406.29
405.79
407.89
408.17
406.26
406.13
405.70
405.13
405.14
405.15
30
405.36
405.76
405.79
405.60
407.30
408.05
406.27
406.12
405.66
405.13
405.11
31
405.77
405.60
407.05
406.71
405.54
405.15
405.11
----------
--------------
Mean
405.13
405.91
405.49
405.74
407.06
407.31
406.70
406.28
405.93
405.24
405.14
405.22
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Max
405.56
406.40
406.70
406.89
408.30
408.60
407.95
406.54
406.11
405.45
405.26
405.53
408.60
Min
404.99
405.53
405.04
405.06
406.28
406.59
406.20
406.12
405.54
405.13
405.09
405.11
404.99
408.69
m. (MSL.) ,
405.10
m. (MSL.) ,
River Bed 404.42
m. (MSL)
410.61
m. (MSL.) ,
410.59
m. (MSL.) ,
Drainage Area 2909 Square Kilometers
at 11.00 Hours , on Sep 15 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Right Bank Elevation
Left Bank Elevation