Basic HTML Version
372
Location : on right bank about 2 kilometers downstream from Sakunothayan Fall.
1,838
sq.km.
WATER YEAR : 2011
NAN RIVER BASIN
Khek River at Ban Wang Nok Aen , Phitsanulok (N.24A)
Lat 16 - 50 - 36 N Long 100 - 31 - 20 E
Amphoe
Wang Thong
Changwat
Phitsanulok
Ban
Wang Nok Aen
Drainge Area
Staff gage
+40.710 m. (MSL.)
B.M.-H.D.
Near the gage site.
Elevation
5-time daily readings at 06.00, 09.00, 12.00, 15.00 and 18.00 hours.
Arithmetic means of 5 readings
1965 to date
+54.851 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
1965 - 1974 , 1980 to date
-
1965 - 1974 , 1980 to date
Stable.
Overbank flow starts at elevation + 49.710 m.(MSL.), records are channel flow only.
Records good. Stage-discharge relation defined by 24 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
41.76
45.21
47.16
44.51
45.94
48.95
47.95
43.74
42.58
42.11
41.93
41.73
2
41.77
45.38
46.25
46.37
50.08
48.87
47.87
43.69
42.56
42.10
41.92
41.72
3
41.81
44.56
45.86
45.60
49.08
50.71
48.64
43.63
42.54
42.09
41.96
41.71
4
41.83
43.06
45.40
45.73
48.13
49.14
48.84
43.57
42.52
42.08
42.08
41.70
5
41.82
43.61
45.48
45.20
47.04
48.39
47.96
43.51
42.50
42.08
42.25
41.69
6
41.80
45.22
45.87
44.96
46.09
50.52
48.18
43.46
42.46
42.07
42.15
41.68
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
41.98
45.84
46.23
44.41
45.50
50.97
47.75
43.43
42.45
42.07
42.13
41.67
8
41.97
45.26
45.55
44.03
45.27
49.79
46.86
43.40
42.44
42.06
42.09
41.67
9
41.96
45.47
45.21
43.81
45.57
50.69
46.44
43.35
42.42
42.06
42.02
41.67
10
42.14
44.39
44.80
44.07
45.37
51.29
46.11
43.41
42.41
42.05
41.96
41.67
11
42.17
44.04
44.47
43.63
45.08
50.43
45.85
43.36
42.39
42.04
41.93
41.79
12
42.10
43.89
45.12
43.61
46.06
49.91
45.68
43.37
42.36
42.02
41.91
42.10
13
41.90
43.40
44.77
43.47
46.80
51.75
45.96
43.35
42.35
42.01
41.89
41.85
14
41.92
42.52
45.37
44.56
46.18
51.86
45.86
43.25
42.33
42.00
41.87
41.80
15
41.90
44.24
44.50
44.63
45.92
50.76
46.17
43.16
42.32
41.99
41.86
41.80
16
41.81
44.01
44.24
45.22
46.52
51.09
47.06
43.11
42.31
41.99
41.85
41.84
17
41.90
43.31
45.27
44.84
47.67
50.48
45.84
43.07
42.30
41.98
41.84
41.91
18
41.88
43.32
45.28
44.35
47.77
49.56
45.38
43.04
42.28
41.97
41.83
42.29
19
42.05
44.31
46.78
47.48
46.52
49.05
45.12
43.02
42.27
41.96
41.82
42.09
20
42.00
46.86
45.57
46.44
47.61
48.81
44.89
42.99
42.25
41.95
41.81
41.96
21
42.14
46.60
44.97
46.42
49.64
49.02
44.94
42.96
42.24
41.95
41.80
41.87
22
41.98
44.85
45.08
46.71
50.09
48.91
44.87
42.91
42.23
41.96
41.80
41.82
23
42.15
43.91
44.50
46.70
48.99
49.04
44.51
42.92
42.22
42.02
41.79
41.79
24
42.37
43.42
44.18
45.75
47.79
50.26
44.37
42.87
42.21
42.04
41.78
41.76
25
42.03
43.37
43.95
45.46
46.76
49.61
44.30
42.83
42.19
42.01
41.76
41.74
26
41.99
43.51
44.21
46.26
46.41
48.89
44.21
42.74
42.18
42.00
41.75
41.73
27
41.98
44.36
44.47
46.28
46.48
49.15
44.12
42.66
42.17
42.03
41.75
41.70
28
42.14
44.19
44.25
45.61
46.77
49.63
44.04
42.62
42.15
42.02
41.74
41.68
29
42.33
45.97
44.27
45.79
46.45
48.99
43.97
42.61
42.14
41.98
41.74
41.67
30
43.09
48.74
44.04
45.25
49.42
48.59
43.89
42.60
42.13
41.96
41.66
31
48.33
44.71
50.53
43.81
42.12
41.94
41.65
----------
--------------
Mean
42.02
44.68
45.10
45.22
47.21
49.84
45.85
43.15
42.32
42.02
41.90
41.79
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Max
43.09
48.74
47.16
47.48
50.53
51.86
48.84
43.74
42.58
42.11
42.25
42.29
51.86
Min
41.76
42.52
43.95
43.47
45.08
48.39
43.81
42.60
42.12
41.94
41.74
41.65
41.65
52.17
m. (MSL.) ,
40.71
m. (MSL.) ,
River Bed 41.29
m. (MSL)
52.47
m. (MSL.) ,
49.70
m. (MSL.) ,
Drainage Area 1838 Square Kilometers
at 09.00 Hours , on Sep 13 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation