Basic HTML Version
636
Location : on left bank at Ban Mai.
2,060
sq.km.
WATER YEAR : 2012
TAPI RIVER BASIN
Khlong I - Pan at Ban Mai , Surat Thani (X.258)
Lat 08 - 32 - 53 N Long 99 - 06 - 36 E
Drainge Area
Amphoe
Phrasaeng
Changwat
Surat Thani
Ban
Mai
Staff gage
+0.000 m. (MSL.)
B.M.-H.D.
On left bank downstream at the footpath
Elevation
5-time daily readings at 06.00, 09.00, 12.00, 15.00 and 18.00 hours.
Arithmetic mean of 5 readings
2007 to date
Rating Operation
Period of Available Gage Records
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+61.081 m. (MSL.)
Type of Gage
Bench Mark
Location BM
2007 to date
-
2007 to date
Fairly stable.
No overbank flow.
Records fair. Stage-discharge relation defined by 23 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
51.35
52.55
54.00
51.50
51.36
53.30
54.40
52.10
51.34
51.43
50.93
50.74
2
51.56
52.17
54.00
51.80
51.40
52.51
53.60
52.00
51.56
51.45
50.92
50.74
3
52.20
52.00
54.50
52.26
51.35
51.74
52.92
52.50
51.50
51.54
50.91
50.72
4
52.74
51.80
55.23
52.10
51.35
51.53
52.55
53.49
51.56
51.76
50.90
50.72
5
52.30
51.60
55.96
51.80
51.30
51.58
52.30
53.98
51.60
52.23
50.90
50.72
6
51.96
51.90
56.60
52.14
51.20
51.64
52.19
53.73
51.60
52.84
50.87
50.71
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Gage Height in Meter (MSL.) Water Year April 1, 2012 to March 31, 2013
7
51.80
52.40
57.20
52.60
51.20
52.10
52.10
53.08
51.66
52.45
50.86
50.71
8
51.70
52.91
58.00
53.10
51.10
53.36
52.00
52.61
51.75
51.68
50.85
50.71
9
51.60
53.35
58.32
53.20
51.10
52.90
52.00
52.90
51.84
51.47
50.84
50.70
10
51.50
53.00
58.41
52.74
51.00
51.66
51.92
53.22
51.99
51.39
50.83
50.70
11
51.50
52.40
58.03
52.40
51.00
52.20
51.90
52.50
52.91
51.31
50.80
50.68
12
52.75
51.90
57.42
52.40
51.00
52.70
52.10
52.28
53.29
51.26
50.77
50.68
13
53.41
51.70
56.85
52.32
50.95
53.20
52.18
52.83
52.42
51.19
50.77
50.68
14
53.08
51.60
56.13
52.13
50.95
54.90
52.21
53.16
51.95
51.15
50.77
50.67
15
52.60
51.45
54.62
51.93
50.95
55.63
52.73
52.95
51.78
51.12
50.76
50.67
16
52.20
51.45
53.90
51.70
50.99
55.25
52.60
52.33
51.68
51.08
50.75
50.67
17
52.10
51.84
53.40
51.50
50.96
54.54
52.32
51.90
51.53
51.01
50.86
50.67
18
52.40
52.60
52.90
51.64
51.00
53.10
52.20
51.73
51.37
50.97
50.85
50.67
19
53.38
52.14
52.50
51.57
51.00
52.45
52.19
52.51
51.34
50.96
50.84
50.67
20
53.68
51.70
52.10
51.55
51.00
52.20
52.17
53.53
51.77
50.96
50.83
50.66
21
53.03
51.50
51.80
51.57
51.00
52.00
52.25
52.59
52.05
50.96
50.82
50.66
22
52.60
51.45
51.81
51.50
51.00
52.00
52.45
52.14
52.71
50.96
50.82
50.66
23
52.50
51.40
51.90
51.38
51.00
51.88
52.30
52.00
53.43
50.96
50.81
50.65
24
52.50
51.40
52.00
51.30
51.00
52.19
52.00
52.28
52.92
50.96
50.79
50.65
25
52.23
51.92
51.94
51.30
52.20
51.96
52.00
52.46
52.32
50.95
50.77
50.64
26
52.20
53.18
51.82
51.40
52.24
52.42
51.99
52.47
52.02
50.95
50.92
50.64
27
52.70
53.51
51.72
51.34
51.80
53.94
51.98
52.35
51.60
50.95
51.05
50.64
28
53.10
53.68
51.69
51.33
51.90
55.00
51.96
52.25
51.39
50.95
50.94
50.64
29
52.12
54.36
51.67
51.26
52.38
55.74
51.95
52.21
51.39
50.95
50.63
30
51.96
54.48
51.66
51.20
53.62
55.10
51.95
51.98
51.39
50.94
50.63
31
54.07
51.19
53.99
51.94
51.39
50.94
50.63
----------
--------------
Mean
52.36
52.37
54.27
51.84
51.43
53.02
52.30
52.60
51.90
51.28
50.85
50.68
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Max
53.68
54.48
58.41
53.20
53.99
55.74
54.40
53.98
53.43
52.84
51.05
50.74
58.41
Min
51.35
51.40
51.66
51.19
50.95
51.53
51.90
51.73
51.34
50.94
50.75
50.63
50.63
58.41
m. (MSL.) ,
0.00
m. (MSL.) ,
River Bed 49.34
m. (MSL.)
60.83
m. (MSL.) ,
60.83
m. (MSL.) ,
Drainage Area 2060 Square Kilometers
at 12.00 Hours , on Jun 10 , 2012
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Right Bank Elevation
Left Bank Elevation