Basic HTML Version
646
Location : on left bank at Ban Pak Min.
510
sq.km.
WATER YEAR : 2011
TAPI RIVER BASIN
Khlong Chandee at Ban Pak Min , Nakhon Si Thammarat (X.257)
Lat 08 - 33 - 34 N Long 99 - 32 - 11 E
Drainge Area
Amphoe
Chawang
Changwat
Nakhon Si Thammarat
Ban
Pak Min
Water - stage recorder
+0.000 m. (MSL.)
B.M.-H.D.
On left bank at the footpath of the bridge.
Elevation
Recording
Arithmetic means of 24 readings
2007 to date
Rating Operation
Period of Available Gage Records
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+29.438 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 27 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
28.72
23.88
23.98
23.55
24.75
25.09
24.84
24.73
24.37
24.66
23.93
23.10
2
28.36
23.88
23.96
23.54
24.60
24.98
24.89
24.40
24.42
24.83
23.98
23.09
3
28.12
23.90
23.90
23.52
24.30
24.70
24.96
24.18
24.26
24.83
23.92
23.07
4
27.72
23.92
23.88
23.50
24.07
24.40
25.08
24.02
24.12
24.72
23.87
23.06
5
27.53
23.97
23.86
23.48
23.92
24.09
25.00
24.00
23.92
24.86
23.77
23.10
6
27.36
24.00
23.84
23.46
23.82
23.96
25.32
24.05
23.77
25.41
23.71
23.14
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
27.27
24.06
23.82
23.44
23.73
23.90
25.56
23.94
23.67
25.30
23.63
23.09
8
26.92
24.02
23.80
23.54
23.70
23.81
25.39
23.85
23.74
25.20
23.52
23.08
9
26.84
23.98
23.88
23.50
23.68
24.07
25.10
23.80
23.83
24.91
23.45
23.30
10
26.78
23.93
23.89
23.44
23.79
24.47
24.86
23.80
24.20
24.62
23.36
23.21
11
26.74
23.90
23.96
23.46
23.76
24.84
24.74
23.78
24.26
24.26
23.26
23.13
12
26.66
23.88
24.14
23.48
23.74
24.96
24.82
23.69
24.17
24.08
23.15
23.08
13
26.51
23.90
24.12
23.46
23.72
24.90
25.54
23.62
23.97
24.08
23.10
23.05
14
26.39
23.91
24.02
23.45
23.70
24.60
25.62
23.60
23.87
24.24
23.40
23.02
15
26.30
23.84
23.94
24.16
23.70
24.36
25.32
23.56
23.94
24.52
23.39
23.01
16
26.12
23.70
23.86
24.40
23.84
24.26
24.81
23.52
24.44
24.73
23.37
22.99
17
25.94
23.74
23.76
24.24
24.08
24.17
24.56
23.52
24.66
24.83
23.35
22.97
18
25.73
23.79
23.70
24.16
24.06
24.41
24.26
23.52
24.40
24.93
23.32
23.01
19
25.58
23.77
23.77
23.96
24.07
25.39
24.16
23.52
24.26
25.27
23.58
23.10
20
25.45
23.76
23.90
23.74
24.06
25.28
24.14
23.54
24.14
25.44
23.48
23.04
21
25.30
23.89
24.07
23.70
24.10
25.16
24.07
23.60
24.15
25.26
23.35
23.06
22
25.14
24.22
23.95
23.68
24.24
24.86
23.98
24.68
23.96
25.12
23.29
23.01
23
24.95
24.03
23.88
23.76
24.40
24.85
23.92
25.16
24.32
24.88
23.26
22.97
24
24.84
23.84
23.82
23.91
24.35
24.92
23.90
25.16
24.98
24.60
23.23
22.94
25
24.66
23.80
23.74
23.90
24.74
24.95
23.92
25.22
25.30
24.30
23.21
22.94
26
24.39
23.78
23.70
23.94
24.87
24.98
24.37
25.44
25.16
24.04
23.18
22.99
27
24.01
23.76
23.65
24.00
24.70
24.89
24.57
25.58
25.01
23.91
23.15
23.01
28
23.92
23.75
23.59
24.14
25.13
24.84
24.65
25.38
24.93
23.89
23.14
22.99
29
23.91
23.74
23.57
24.49
25.62
24.85
24.73
25.25
24.48
23.80
23.13
22.96
30
23.90
23.72
23.56
24.66
25.31
24.77
24.75
25.12
24.25
23.84
22.99
31
23.71
24.64
25.18
24.81
24.33
23.83
23.23
----------
--------------
Mean
26.07
23.87
23.85
23.82
24.25
24.66
24.73
24.24
24.30
24.62
23.43
23.06
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Max
28.72
24.22
24.14
24.66
25.62
25.39
25.62
25.58
25.30
25.44
23.98
23.30
28.72
Min
23.90
23.70
23.56
23.44
23.68
23.81
23.90
23.52
23.67
23.80
23.10
22.94
22.94
28.86
m. (MSL.) ,
0.00
m. (MSL.) ,
River Bed 21.38
m. (MSL)
29.32
m. (MSL.) ,
29.33
m. (MSL.) ,
Drainage Area 510 Square Kilometers
at 06.00 Hours , on Apr 1 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Right Bank Elevation
Left Bank Elevation