Basic HTML Version
378
Location : on left bank about 50 meters upstream from the bridge along Lom Sak - Nakhon Thai Road, Tambon Nong Krathao.
1,710
sq.km.
WATER YEAR : 2011
NAN RIVER BASIN
Nam Khwae Noi at Ban Nong Krathao , Phitsanulok (N.36)
Lat 17 - 04 - 59 N Long 100 - 49 - 44 E
Amphoe
Nakhon Thai
Changwat
Phitsanulok
Ban
Nong Krathao
Drainge Area
Staff gage
+191.880 m. (MSL.)
B.M.-H.D.
On left bank along the measuring line.
Elevation
5-time daily readings at 06.00, 09.00, 12.00, 15.00 and 18.00 hours.
Arithmetic means of 5 readings
1967 to date
+200.293 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
1971 - 1979 , 1993 to date
-
1971 - 1979 , 1993 to date
Stable.
No overbank flow.
Records very good. Stage-discharge relation defined by 16 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
193.34
194.97
196.99
196.38
198.48
199.23
199.04
194.68
193.83
193.44
193.37
193.20
2
193.34
195.14
196.00
197.24
199.35
199.20
198.97
194.65
193.58
193.41
193.40
193.22
3
193.29
194.64
195.25
197.37
199.40
199.21
199.28
194.56
193.55
193.44
193.48
193.30
4
193.30
194.79
195.46
197.06
199.28
199.39
199.53
194.50
193.58
193.42
193.57
193.29
5
193.25
195.48
195.57
197.11
199.09
199.21
199.29
194.39
193.55
193.43
193.62
193.26
6
193.35
195.09
195.28
196.38
198.88
199.30
199.08
194.37
193.52
193.43
193.50
193.26
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
193.31
195.04
195.70
195.69
198.63
199.52
198.97
194.34
193.50
193.43
193.51
193.25
8
193.34
195.01
195.17
195.26
198.29
199.49
198.66
194.29
193.49
193.43
193.46
193.23
9
193.46
195.55
194.86
195.04
198.04
199.43
198.33
194.22
193.48
193.42
193.39
193.22
10
193.23
194.92
194.79
194.99
197.73
199.40
197.92
194.19
193.48
193.39
193.36
193.23
11
193.43
194.72
194.52
195.04
197.75
199.35
197.43
194.17
193.55
193.39
193.31
193.50
12
193.66
194.77
195.01
194.81
198.32
199.19
197.08
194.13
193.44
193.38
193.30
193.60
13
193.45
194.17
196.52
194.77
198.49
199.23
196.95
194.16
193.43
193.40
193.29
193.61
14
193.42
194.68
196.25
195.02
198.42
199.33
197.31
194.11
193.43
193.40
193.29
193.59
15
193.35
195.10
195.74
196.02
198.21
199.37
197.65
194.09
193.48
193.40
193.28
193.58
16
193.34
194.59
195.09
197.02
197.91
199.39
197.72
194.07
193.46
193.42
193.24
193.58
17
193.34
194.20
195.87
197.54
197.71
199.61
197.02
193.94
193.49
193.40
193.23
193.58
18
193.21
194.19
197.42
196.76
198.32
199.50
196.28
193.92
193.50
193.36
193.19
193.58
19
193.26
195.05
198.00
197.24
198.70
199.29
195.95
193.92
193.46
193.32
193.18
193.57
20
193.38
197.34
197.27
198.48
199.02
199.13
195.81
193.92
193.43
193.32
193.19
193.56
21
193.41
198.39
196.39
198.29
199.42
198.97
195.68
193.87
193.45
193.43
193.10
193.56
22
193.11
197.39
195.72
198.09
199.28
198.99
195.70
193.86
193.44
193.49
193.08
193.55
23
193.16
195.18
195.32
197.93
199.14
199.09
195.45
193.85
193.44
193.55
193.10
193.52
24
193.39
194.47
194.95
197.65
199.01
199.10
195.36
193.83
193.46
193.46
193.16
193.46
25
193.53
195.04
194.94
197.35
198.75
199.04
195.23
193.78
193.49
193.43
193.25
193.41
26
193.51
195.24
196.92
197.43
198.46
198.96
195.09
193.73
193.46
193.41
193.21
193.30
27
193.50
195.80
198.02
197.86
198.34
198.93
195.02
193.71
193.44
193.33
193.22
193.18
28
193.48
195.49
197.92
197.77
198.15
199.32
194.90
193.75
193.44
193.32
193.25
193.19
29
193.61
197.74
197.50
197.75
197.62
199.39
194.81
193.75
193.45
193.37
193.26
193.09
30
194.12
198.06
196.80
197.39
198.13
199.24
194.81
193.84
193.44
193.37
193.21
31
197.54
196.67
199.13
194.71
193.44
193.37
193.22
----------
--------------
Mean
193.40
195.48
196.04
196.75
198.56
199.26
196.94
194.09
193.49
193.41
193.30
193.38
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Max
194.12
198.39
198.02
198.48
199.42
199.61
199.53
194.68
193.83
193.55
193.62
193.61
199.61
Min
193.11
194.17
194.52
194.77
197.62
198.93
194.71
193.71
193.43
193.32
193.08
193.09
193.08
199.63
m. (MSL.) ,
191.88
m. (MSL.) ,
River Bed 191.07
m. (MSL)
203.14
m. (MSL.) ,
203.17
m. (MSL.) ,
Drainage Area 1710 Square Kilometers
at 12.00 Hours , on Sep 17 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation