Basic HTML Version
376
Location : on left bank at Ban Na Pho Na Chan.
415
sq.km.
WATER YEAR : 2012
NAN RIVER BASIN
Lam Nam Khan at Ban Na Pho Na Chan , Phitsanulok (N.59)
Lat 17 - 01 - 49 N Long 100 - 50 - 35 E
Amphoe
Nakhon Thai
Changwat
Phitsanulok
Ban
Na Pho Na Chan
Drainge Area
Staff gage
+197.680 m. (MSL.)
B.M.-H.D.
On left bank about 25 meters from the top staff gage.
Elevation
5-time daily readings at 06.00, 09.00, 12.00, 15.00 and 18.00 hours.
Arithmetic mean of 5 readings
1984 to date
+206.935 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
1996 to date
-
1996 to date
Stable.
No overbank flow.
Records good. Stage-discharge relation defined by 20 discharge measurements made in 2012.
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
200.37
200.31
200.89
201.06
202.16
203.46
202.48
201.66
202.18
201.19
201.14
200.61
2
200.35
200.30
201.34
205.04
201.81
202.68
202.18
201.60
201.84
201.18
201.10
200.61
3
200.34
200.28
200.88
205.37
201.67
205.89
203.53
201.46
202.12
201.15
201.05
201.14
4
200.40
200.23
200.75
205.38
201.59
205.75
203.43
201.42
201.90
201.12
200.99
201.08
5
200.42
200.62
201.23
203.48
201.57
205.03
204.63
201.46
201.79
201.13
200.87
201.10
6
200.63
200.51
201.34
202.07
201.44
204.10
205.60
201.56
201.63
201.12
200.85
201.01
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Gage Height in Meter (MSL.) Water Year April 1, 2012 to March 31, 2013
7
200.48
202.59
202.96
202.28
201.43
203.77
204.08
201.42
201.51
201.11
200.83
200.80
8
200.41
202.67
201.66
202.51
201.43
203.89
203.90
201.83
201.54
201.11
200.80
200.67
9
200.33
202.77
201.78
202.73
205.45
205.00
203.19
201.89
201.48
201.09
200.77
200.66
10
200.43
201.37
201.33
202.56
205.33
204.05
202.89
201.59
201.46
201.08
200.73
200.64
11
200.41
200.70
201.03
202.95
205.12
205.02
202.50
201.51
201.55
201.07
200.69
200.63
12
200.32
200.62
200.81
202.49
203.49
204.98
202.12
201.59
201.49
201.05
200.69
200.64
13
200.28
200.51
200.67
204.50
203.14
204.80
202.02
201.79
201.51
201.05
200.67
200.63
14
200.29
200.47
200.59
202.80
202.72
205.47
203.53
201.51
201.54
201.05
200.66
200.62
15
200.26
200.43
200.42
202.59
202.51
204.34
202.53
201.42
201.46
201.04
200.70
200.61
16
200.38
200.44
200.58
202.04
202.65
203.80
202.08
201.37
201.41
201.03
200.69
200.61
17
200.33
200.46
200.50
201.83
202.15
203.32
202.06
201.36
201.40
201.03
200.71
200.61
18
200.37
201.42
200.40
201.67
201.96
203.04
201.93
201.35
201.38
201.02
200.69
200.60
19
200.39
203.77
201.11
202.65
201.86
203.24
201.90
201.34
201.35
201.01
200.67
200.59
20
200.35
202.49
200.84
201.82
202.95
205.10
201.85
201.32
201.34
200.98
200.66
200.54
21
200.35
201.39
200.72
201.72
204.40
204.08
201.82
201.30
201.33
200.96
200.70
200.53
22
200.34
200.92
200.66
201.62
203.01
204.30
201.77
201.68
201.32
200.95
200.74
200.52
23
200.38
200.78
200.63
201.59
202.31
204.75
201.67
201.43
201.31
200.94
200.69
200.52
24
200.34
201.18
200.80
201.52
202.12
203.39
201.66
201.33
201.18
200.93
200.66
200.53
25
200.34
201.03
200.73
202.13
202.68
203.28
201.68
201.31
201.13
200.95
200.64
200.54
26
200.35
201.23
200.79
202.06
202.64
204.21
201.69
201.49
201.22
200.97
200.63
200.56
27
200.32
201.21
201.25
201.86
203.07
203.24
201.68
201.61
201.25
200.99
200.63
200.46
28
200.34
202.04
202.47
202.28
203.73
203.31
201.65
201.39
201.24
201.00
200.62
200.44
29
200.34
201.92
202.52
202.94
204.31
203.34
201.58
203.65
201.23
201.06
200.44
30
200.32
202.85
202.46
202.87
204.99
203.26
201.60
203.09
201.24
201.05
200.43
31
201.27
202.33
203.60
201.58
201.22
201.03
200.43
----------
--------------
Mean
200.37
201.25
201.14
202.60
202.88
204.13
202.48
201.62
201.47
201.05
200.76
200.64
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Max
200.63
203.77
202.96
205.38
205.45
205.89
205.60
203.65
202.18
201.19
201.14
201.14
205.89
Min
200.26
200.23
200.40
201.06
201.43
202.68
201.58
201.30
201.13
200.93
200.62
200.43
200.23
206.23
m. (MSL.) ,
197.68
m. (MSL.) ,
River Bed 200.03
m. (MSL.)
206.63
m. (MSL.) ,
206.79
m. (MSL.) ,
Drainage Area 415 Square Kilometers
at 18.00 Hours , on Jul 3 , 2012
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation