Basic HTML Version
650
Location : on left bank at Ban Arpart.
2,076
sq.km.
Drainge Area
WATER YEAR : 2011
TAPI RIVER BASIN
Lower Khlong I - Pan at Ban Arpart , Surat Thani (X.260)
Lat 08 - 32 - 28 N Long 99 - 13 - 25 E
Amphoe
Phrasaeng
Changwat
Surat Thani
Ban
Arpart
Water - stage recorder
+0.000 m. (MSL.)
B.M.-H.D.
On left bank near the top staff gage.
Elevation
Recording
Arithmetic means of 24 readings
2007 to date
Rating Operation
Period of Available Gage Records
Location BM
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+13.658 m. (MSL.)
Bench Mark
Type of Gage
2007 to date
-
2007 to date
Fairly stable because of backwater effect.
Overbank flow starts at elevation +13.600 m.(MSL.), records are channel flow only.
Records fair. Stage-discharge relation defined by 26 discharge measurements made in 2011.
Period of Rating
Rated by Flot
Rated by Current Meter
Stability of Channel Regimes
Overbank Flow Conditions
General Description
Date
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Annual
----------
-----------------
1
14.68
7.75
7.00
6.65
8.74
10.29
10.15
9.74
9.67
8.53
8.73
7.85
2
14.31
7.36
7.86
6.56
8.52
10.17
10.33
9.35
10.46
8.94
8.53
7.78
3
13.87
7.30
8.29
6.65
8.40
9.88
10.55
8.61
11.52
9.28
8.55
7.73
4
13.35
7.57
8.63
6.62
7.97
8.83
10.60
7.87
11.62
9.46
8.87
7.80
5
12.85
7.80
7.88
6.50
7.52
8.75
10.62
8.13
11.28
9.54
9.12
7.80
6
12.34
7.80
7.60
6.39
7.11
8.51
10.54
8.40
10.87
9.64
8.87
8.47
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
11.79
7.79
7.45
6.16
6.85
8.30
10.48
8.24
10.41
9.76
8.80
8.70
8
11.37
7.84
7.33
6.22
6.65
8.30
10.49
7.88
9.90
9.87
8.55
9.52
9
11.05
7.77
7.63
6.12
6.46
8.36
10.53
8.20
9.34
10.23
8.46
10.02
10
10.91
7.59
7.64
6.15
6.46
8.73
10.33
8.14
8.79
10.36
8.17
10.35
11
10.64
7.68
7.58
6.11
6.44
9.31
10.16
8.10
8.63
10.23
7.86
10.02
12
10.50
8.07
7.82
6.30
7.00
10.06
10.15
8.08
8.55
10.32
7.78
9.63
13
10.27
8.12
7.62
7.27
7.28
10.75
10.02
8.17
8.41
10.42
7.48
8.57
14
10.15
7.91
7.59
8.10
7.32
11.65
9.97
8.28
8.42
10.36
6.93
8.34
15
10 01
7 74
7 62
8 80
7 45
11 68
10 01
8 57
8 60
10 22
7 24
8 10
.
.
.
.
.
.
.
.
.
.
.
.
16
9.96
7.54
7.66
9.19
7.32
11.42
9.74
8.87
8.64
10.12
7.85
8.82
17
9.86
7.37
7.67
9.27
7.19
11.06
9.35
9.01
8.77
9.97
7.83
8.59
18
9.79
7.67
7.79
8.71
7.25
10.41
9.10
8.62
8.77
9.87
7.75
8.38
19
9.58
7.95
7.73
8.40
7.32
10.27
9.10
8.06
8.60
9.76
7.73
8.17
20
9.28
8.06
7.59
7.97
7.41
10.38
8.80
7.70
8.25
9.66
7.79
8.00
21
8.89
8.21
7.52
7.54
7.60
10.27
8.60
7.46
8.43
9.42
7.89
7.86
22
8.54
8.11
7.50
7.00
7.72
10.15
8.50
7.40
7.91
9.15
7.68
7.77
23
8.33
7.92
7.37
6.98
8.42
10.24
8.50
8.39
7.92
8.92
7.42
7.52
24
8.20
7.57
7.34
7.14
8.65
10.33
8.15
8.53
7.79
8.77
7.12
7.62
25
8.06
7.33
7.62
7.24
8.81
10.14
7.97
8.80
7.57
8.68
7.37
7.30
26
8.04
7.18
7.60
7.38
8.94
9.90
7.77
9.20
7.56
8.76
7.39
7.31
27
8.04
7.26
7.07
7.56
9.33
9.68
7.70
9.14
7.83
8.84
6.92
7.83
28
7.99
7.10
6.73
7.82
9.88
9.32
7.72
9.17
7.98
8.76
6.66
7.26
29
7.99
6.79
6.68
8.58
10.04
9.39
7.76
9.37
8.15
8.51
6.59
6.68
30
7.98
6.77
6.68
9.12
10.38
9.73
7.83
9.23
8.29
8.48
6.50
31
6.76
9.10
10.37
8.30
8.31
8.65
6.46
----------
--------------
Mean
10.29
7.60
7.54
7.41
7.96
9.88
9.35
8.49
8.94
9.47
7.86
8.15
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Max
14.68
8.21
8.63
9.27
10.38
11.68
10.62
9.74
11.62
10.42
9.12
10.35
14.68
Min
7.98
6.76
6.68
6.11
6.44
8.30
7.70
7.40
7.56
8.48
6.59
6.46
6.11
14.83
m. (MSL.) ,
0.00
m. (MSL.) ,
River Bed 3.91
m. (MSL)
13.60
m. (MSL.) ,
13.61
m. (MSL.) ,
Drainage Area 2076 Square Kilometers
at 01.00 Hours , on Apr 1 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation