Basic HTML Version
640
Location : on left bank at Tambon Yan Din Daeng.
5,383
sq.km.
WATER YEAR : 2011
TAPI RIVER BASIN
Tapi River at Ban Yan Din Daeng , Surat Thani (X.37A)
Lat 08 - 34 - 03 N Long 99 - 15 - 15 E
Drainge Area
Amphoe
Phrasaeng
Changwat
Surat Thani
Ban
Yan Din Daeng
Water - stage recorder.
+0.000 m. (MSL.)
B.M.-H.D.
Near the automatic gage building.
Elevation
Recording
Arithmetic means of 24 readings
1969 to date
Rating Operation
Period of Available Gage Records
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+10.240 m. (MSL.)
Type of Gage
Bench Mark
Location BM
1969 to date
-
1969 to date
Stable.
Overbank flow starts at elevation +12.440 m.(MSL.), records are channel flow only.
Records good. Stage-discharge relation defined by 26 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
13.38
7.40
7.07
6.35
8.71
9.86
9.50
8.06
9.36
7.58
8.24
6.11
2
12.84
7.59
7.64
6.30
8.59
9.89
9.66
7.94
9.12
7.78
8.38
6.07
3
12.32
7.62
7.85
6.26
8.44
9.77
9.78
7.72
9.11
9.07
8.22
6.02
4
11.93
7.63
7.90
6.26
8.19
9.56
9.86
7.69
9.25
9.69
7.94
5.99
5
11.60
7.83
7.74
6.21
7.70
9.26
9.88
7.86
9.44
10.04
7.64
5.97
6
11.32
8.00
7.57
6.14
7.21
8.85
9.86
8.03
9.62
10.28
7.41
6.27
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
11.05
7.92
7.38
6.07
6.87
8.37
9.87
7.97
9.67
10.29
7.28
6.52
8
10.88
7.78
7.23
6.01
6.65
8.00
9.91
7.84
9.57
10.12
7.11
7.09
9
10.77
7.59
7.32
5.96
6.49
7.72
9.91
7.78
9.29
9.84
6.97
7.64
10
10.64
7.67
7.35
5.92
6.37
7.63
9.86
7.73
8.92
9.47
6.85
7.85
11
10.46
8.00
7.28
5.91
6.32
8.41
9.78
7.74
8.64
9.02
6.75
7.80
12
10.27
8.13
7.43
5.92
6.38
9.16
9.68
7.60
8.52
8.57
6.66
7.46
13
10.15
8.02
7.65
6.13
6.51
9.52
9.63
7.69
8.44
8.24
6.58
6.82
14
9.99
7.82
7.61
6.99
6.73
9.93
9.71
8.08
8.21
8.17
6.53
6.42
15
9.79
7.65
7.43
8.02
6.87
10.27
9.71
8.24
7.81
8.34
6.46
6.28
16
9.57
7.40
7.29
8.60
7.10
10.26
9.60
8.26
7.70
8.85
6.40
6.24
17
9.34
7.22
7.29
8.82
7.35
10.11
9.40
8.20
8.26
9.13
6.35
6.09
18
9.09
7.32
7.28
8.79
7.22
9.91
9.12
7.88
8.65
9.36
6.46
6.12
19
8.93
7.65
7.63
8.43
7.13
9.66
8.82
7.51
8.72
9.47
6.95
6.37
20
8.94
7.98
8.04
8.01
7.19
9.50
8.58
7.09
8.67
9.58
7.69
6.67
21
8.94
8.23
7.84
7.57
7.45
9.51
8.25
6.91
8.41
9.74
8.06
6.68
22
8.86
8.22
7.40
7.02
7.63
9.53
8.17
7.05
8.04
9.86
7.70
6.56
23
8.62
7.99
7.06
6.67
8.14
9.47
8.07
7.73
7.89
9.90
7.06
6.22
24
8.31
7.58
6.94
6.65
8.48
9.25
7.84
8.41
8.07
9.84
6.68
5.95
25
8.04
7.32
7.23
6.81
8.59
8.99
7.60
8.76
8.34
9.66
6.52
5.82
26
7.82
7.19
7.08
7.15
8.49
8.85
7.50
9.04
8.79
9.43
6.37
5.80
27
7.77
7.24
6.76
7.58
8.53
8.77
7.64
9.15
8.83
9.14
6.19
5.93
28
7.77
7.10
6.57
7.68
8.96
8.79
7.90
9.27
8.69
8.71
6.10
6.03
29
7.59
6.94
6.45
8.02
9.35
9.01
8.02
9.40
8.44
8.19
6.09
6.20
30
7.39
6.79
6.38
8.57
9.59
9.29
7.98
9.49
8.09
7.90
6.17
31
6.79
8.77
9.72
8.01
7.77
8.00
6.17
----------
--------------
Mean
9.81
7.60
7.32
7.08
7.71
9.24
9.00
8.07
8.66
9.14
7.02
6.43
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Max
13.38
8.23
8.04
8.82
9.72
10.27
9.91
9.49
9.67
10.29
8.38
7.85
13.38
Min
7.39
6.79
6.38
5.91
6.32
7.63
7.50
6.91
7.70
7.58
6.09
5.80
5.80
13.59
m. (MSL.) ,
0.00
m. (MSL.) ,
River Bed 2.94
m. (MSL)
12.43
m. (MSL.) ,
12.59
m. (MSL.) ,
Drainage Area 5383 Square Kilometers
at 01.00 Hours , on Apr 1 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Right Bank Elevation
Left Bank Elevation