Basic HTML Version
454
Location : on right bank at Ban Tha Rua
Changwat
Phra Nakhon Si Ayutthaya
15,425 sq.km.
Drainge Area
WATER YEAR : 2012
PASAK RIVER BASIN
Pasak River at Ban Tha Rua , Phra Nakhon Si Ayutthaya (S.26)
Lat 14 - 33 - 22 N Long 100 - 43 - 38 E
Amphoe
Tha Rua
Ban
Tha Rua
Water - stage recorder
+0.000 m. (MSL.)
B.M.-H.D.
On right bank near the automatic gage buiding
Elevation
Recording
Arithmetic mean of 24 readings
1984 to date
Period of Available Gage Records
Bench Mark
Location BM
Type of Gage
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
Rating Operation
+7.860 m. (MSL.)
1998 , 2009 to date
-
1998, 2009 to date
Fairly stable.
No overbank flow.
Records good. Flow effected by Pasak Cholasit Dam.
Stage-discharge relation defined by 26 discharge measurements made in 2012.
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
0.90
0.48
0.72
0.75
1.23
1.91
2.51
1.29
1.05
1.05
0.85
0.87
2
0.70
0.44
0.83
0.82
1.15
1.70
2.59
1.31
1.03
0.93
0.81
0.80
3
0.50
0.46
0.92
0.81
1.15
1.66
2.90
1.47
0.96
0.93
0.80
0.78
4
0.46
0.50
1.00
0.79
1.11
1.75
3.32
1.52
0.93
0.85
0.91
0.79
5
0.50
0.44
1.20
0.82
1.08
1.75
3.37
1.40
0.94
0.84
0.90
0.80
6
0.44
0.15
1.24
0.96
1.03
1.90
3.54
1.36
0.85
0.74
0.94
0.91
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Gage Height in Meter (MSL.) Water Year April 1, 2012 to March 31, 2013
7
0.50
0.17
1.16
1.04
0.96
2.58
3.71
1.35
0.87
0.78
0.91
0.94
8
0.82
0.33
1.28
1.06
0.87
3.24
3.19
1.37
0.83
0.85
0.89
0.89
9
0.84
0.57
1.51
1.18
0.80
2.66
2.80
1.19
0.91
0.82
0.92
0.87
10
0.94
0.69
1.50
1.26
0.85
2.77
3.03
1.06
0.99
0.92
0.92
0.78
11
1.04
0.83
1.74
1.17
0.84
3.18
3.09
1.03
1.06
1.00
0.96
0.70
12
1.10
0.76
1.75
1.07
0.85
3.39
2.84
1.12
1.10
1.05
0.95
0.76
13
1.02
0.70
1.70
1.06
0.78
3.69
2.63
1.16
1.12
0.95
0.98
0.73
14
1.10
0.60
1.80
1.09
0.77
3.57
2.53
1.13
1.14
0.91
1.00
0.65
15
0.82
0.66
0.95
0.98
0.77
3.67
2.52
1.11
1.10
0.96
0.90
0.66
16
0.74
0.69
0.87
1.00
0.79
3.78
2.39
1.11
1.08
0.92
0.88
0.75
17
0.54
0.57
0.88
1.05
0.74
4.03
2.45
1.07
1.05
0.84
0.96
0.75
18
0.44
0.70
0.80
1.02
0.76
4.10
2.28
1.08
1.02
0.73
0.97
0.76
19
0.50
0.81
0.89
0.92
0.99
4.45
2.19
1.10
0.99
0.86
0.85
0.74
20
0.48
0.81
0.90
0.94
1.05
4.80
2.01
1.12
0.95
0.82
0.86
0.77
21
0.50
1.09
0.61
0.96
1.28
4.84
1.88
1.01
0.88
0.68
0.86
0.71
22
0.48
1.09
0.69
0.90
1.30
4.90
1.72
0.91
0.84
0.84
0.80
0.71
23
0.64
1.10
0.68
0.84
1.10
4.74
1.55
0.88
1.00
0.83
0.72
0.52
24
0.82
0.95
0.68
0.82
1.11
4.38
1.37
0.89
1.10
0.82
0.73
0.52
25
0.84
1.09
0.68
0.80
1.08
4.17
1.33
0.97
1.11
0.81
0.83
0.58
26
0.84
1.08
0.68
0.82
0.91
4.05
1.21
1.01
0.97
0.85
0.87
0.65
27
0.83
1.35
0.61
0.89
0.95
3.70
1.18
1.01
0.97
0.84
0.87
0.66
28
0.86
1.35
0.60
0.96
1.33
3.21
1.20
1.06
0.98
0.84
0.83
0.65
29
0.76
1.40
0.65
0.93
1.67
3.08
1.31
1.11
0.93
0.85
0.68
30
0.58
1.15
0.73
1.01
1.71
2.75
1.27
1.07
0.92
0.82
0.70
31
1.17
1.33
1.89
1.31
0.97
0.84
0.77
----------
--------------
Mean
0.72
0.78
1.01
0.97
1.06
3.35
2.30
1.14
0.99
0.86
0.88
0.74
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Max
1.10
1.40
1.80
1.33
1.89
4.90
3.71
1.52
1.14
1.05
1.00
0.94
4.90
Min
0.44
0.15
0.60
0.75
0.74
1.66
1.18
0.88
0.83
0.68
0.72
0.52
0.15
4.92
m. (MSL.) ,
0.00
m. (MSL.) ,
River Bed - 4.22
m. (MSL.)
7.13
m. (MSL.) ,
7.22
m. (MSL.) ,
Drainage Area 15425 Square Kilometers
at 24.00 Hours , on Sep 21 , 2012
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Right Bank Elevation
Left Bank Elevation