Basic HTML Version
548
Location : on left bank near Wat Ban Pa Kha.
203
sq.km.
WATER YEAR : 2011
BANG PAKONG RIVER BASIN
Lower Khlong Ban Na at Ban Pa Kha , Nakhon Nayok (Ny.3)
Lat 14 - 17 - 04 N Long 101 - 04 - 28 E
Amphoe
Ban Na
Changwat
Nakhon Nayok
Ban
Pa Kha
Drainge Area
Water - stage recorder
+6.330 m. (MSL.)
B.M.-H.D.
About 10 meters from the top staff gage.
Elevation
Recording
Arithmetic means of 24 readings
1977 to date
+12.695 m. (MSL.)
Bench Mark
Type of Gage
Rating Operation
Period of Available Gage Records
Location BM
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
1977 - 1978 , 1980, 1988 to date
-
1977 - 1978 , 1980, 1988 to date
Fairly stable.
No overbank flow.
Records good. Flow effected by the local weir.
Stage-discharge relation defined by 23 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
7.29
7.19
7.46
7.93
8.54
8.82
9.78
7.68
7.16
7.20
7.14
7.03
2
7.29
7.19
7.88
7.87
9.01
9.22
9.29
7.62
7.24
7.19
7.15
7.03
3
7.29
7.38
7.52
7.72
9.02
9.47
9.27
7.55
7.22
7.18
7.15
7.03
4
7.24
7.37
6.99
7.69
8.76
9.32
10.33
7.59
7.29
7.17
7.15
7.03
5
7.24
7.50
6.97
7.67
8.59
9.70
10.08
7.56
7.34
7.18
7.15
7.03
6
7.25
7.55
7.59
7.61
8.33
9.58
10.05
7.60
7.33
7.18
7.15
7.03
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
7.31
7.28
7.62
7.56
8.13
9.20
10.34
7.58
7.31
7.18
7.14
7.03
8
7.37
7.12
7.50
7.57
7.99
9.11
9.76
7.54
7.31
7.18
7.14
7.03
9
7.33
7.10
7.48
7.52
7.90
9.71
9.39
7.54
7.30
7.18
7.14
7.03
10
7.24
7.07
7.48
7.47
7.98
11.80
9.27
7.49
7.29
7.18
7.14
7.03
11
7.23
7.09
7.48
7.50
8.08
12.52
10.11
7.45
7.28
7.18
7.14
7.03
12
7.24
7.10
7.68
7.74
8.04
12.61
10.16
7.18
7.27
7.17
7.14
7.03
13
7.26
7.27
7.84
7.73
7.88
12.08
10.22
7.11
7.26
7.17
7.14
7.03
14
7.26
7.37
7.78
7.64
7.79
11.27
9.89
7.08
7.26
7.16
7.14
7.03
15
7.26
7.36
7.70
8.33
7.99
10.38
9.42
7.06
7.25
7.16
7.13
7.03
16
7.26
7.32
7.69
8.72
8.56
9.91
9.19
7.05
7.25
7.16
7.13
7.03
17
7.30
7.27
7.64
9.06
8.50
9.58
8.92
7.04
7.24
7.17
7.13
7.03
18
7.35
7.34
7.64
9.21
9.10
10.10
8.67
7.04
7.23
7.17
7.11
7.03
19
7.27
7.43
7.68
8.60
9.33
10.05
8.46
7.05
7.23
7.16
7.04
7.03
20
7.20
7.41
7.67
9.74
9.21
10.36
8.34
7.06
7.22
7.17
7.04
7.03
21
7.18
7.43
7.71
9.85
9.04
11.61
8.08
7.10
7.22
7.17
7.03
7.03
22
7.15
7.36
7.78
9.76
8.61
10.59
7.56
7.04
7.22
7.17
7.02
7.03
23
7.23
7.28
7.70
9.46
8.31
9.94
7.40
7.04
7.22
7.16
7.02
7.03
24
7.20
7.29
7.69
9.06
8.11
11.60
7.69
7.04
7.23
7.16
7.02
7.03
25
7.20
7.28
7.58
8.94
8.26
11.71
8.97
7.04
7.23
7.15
7.02
7.03
26
7.20
7.28
7.51
8.64
8.40
10.76
8.13
7.05
7.22
7.15
7.04
7.03
27
7.20
7.26
7.95
8.63
8.13
10.75
7.89
7.08
7.21
7.15
7.04
7.03
28
7.20
7.32
9.11
8.35
8.14
10.59
7.82
7.22
7.21
7.14
7.04
7.03
29
7.20
7.30
8.53
8.14
9.74
9.96
7.80
7.17
7.21
7.14
7.03
7.03
30
7.20
7.71
8.09
8.17
9.90
9.95
7.76
7.12
7.21
7.14
7.03
31
8.36
8.31
9.29
7.72
7.20
7.13
7.03
----------
--------------
Mean
7.25
7.34
7.70
8.33
8.54
10.41
8.96
7.26
7.25
7.17
7.10
7.03
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Max
7.37
8.36
9.11
9.85
9.90
12.61
10.34
7.68
7.34
7.20
7.15
7.03
12.61
Min
7.15
7.07
6.97
7.47
7.79
8.82
7.40
7.04
7.16
7.13
7.02
7.03
6.97
12.71
m. (MSL.) ,
6.33
m. (MSL.) ,
River Bed 6.59
m. (MSL)
13.61
m. (MSL.) ,
13.69
m. (MSL.) ,
Drainage Area 203 Square Kilometers
at 13.00 Hours , on Sep 10 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation