Basic HTML Version
8
Location : on right bank at the bridge of Wang Saphung - Loei Highway.
1,271
sq.km.
Amphoe
Wang Saphung
Changwat
Loei
Ban
Na Lak
WATER YEAR : 2011
KHONG RIVER BASIN
Loei River at Ban Na Lak , Loei (Kh.28A)
Lat 17 - 18 - 32 N Long 101 - 46 - 25 E
Drainge Area
Water - stage recorder.
+239.620 m. (MSL.)
B.M.- Highways Dept.
On right bank upstream at the footpath of the bridge.
Elevation
Recording
Arithmetic means of 24 readings
1994 to date
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+252.730 m. (MSL.)
Type of Gage
Bench Mark
Location BM
Rating Operation
Period of Available Gage Records
1994 to date
-
1994 to date
Rather unstable because of backwater effect.
Overbank flow starts at elevation +245.500 m.(MSL.), records are channel flow only.
Records fair. Stage-discharge relation defined by 21 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
239.82
239.96
240.31
240.44
244.57
242.16
242.02
240.28
240.28
240.24
240.16
240.09
2
239.83
240.02
240.29
240.52
243.54
242.06
242.54
240.27
240.28
240.24
240.16
240.09
3
239.80
239.97
240.80
240.66
243.62
242.36
245.46
240.26
240.28
240.24
240.17
240.08
4
239.80
239.79
241.10
240.43
243.75
241.93
247.11
240.25
240.28
240.23
240.18
240.07
5
239.78
239.73
240.85
240.33
241.91
242.38
243.56
240.24
240.28
240.23
240.19
240.06
6
239.78
239.82
241.33
240.25
241.15
243.24
243.28
240.23
240.28
240.22
240.20
240.05
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7
239.78
239.92
241.74
240.14
241.21
244.09
242.19
240.22
240.28
240.22
240.21
240.04
8
239.81
239.85
240.87
240.09
240.64
243.53
241.69
240.21
240.28
240.22
240.21
240.04
9
239.79
239.85
240.48
240.18
240.51
242.65
241.38
240.20
240.28
240.21
240.20
240.05
10
239.79
239.74
240.32
240.50
240.45
243.71
241.47
240.19
240.28
240.21
240.20
240.09
11
239.77
239.69
240.25
240.58
240.52
243.75
241.16
240.18
240.28
240.21
240.18
240.14
12
239.74
239.65
240.11
240.46
241.14
246.28
240.93
240.17
240.27
240.20
240.18
240.13
13
239.73
239.72
240.04
240.53
241.17
248.61
240.84
240.16
240.27
240.20
240.18
240.17
14
239.72
239.93
240.02
240.62
240.86
246.49
240.88
240.16
240.27
240.19
240.17
240.22
15
239.72
239.87
240.00
240.94
240.92
244.26
240.78
240.15
240.27
240.18
240.17
240.20
16
239.71
239.83
240.10
241.10
240.74
244.10
240.91
240.15
240.27
240.17
240.17
240.22
17
239.70
239.82
240.32
240.88
241.30
242.99
240.90
240.14
240.27
240.16
240.16
240.24
18
239.69
239.81
240.20
240.59
243.31
242.16
241.07
240.14
240.27
240.16
240.16
240.19
19
239.65
239.92
240.17
240.98
242.94
243.03
240.92
240.12
240.27
240.16
240.15
240.15
20
239.64
240.18
240.13
241.46
243.19
242.74
240.70
240.11
240.27
240.15
240.15
240.13
21
239.64
240.27
240.13
240.84
243.63
243.03
240.59
240.10
240.27
240.18
240.14
240.11
22
239.64
240.06
240.15
241.00
241.91
243.45
240.50
240.09
240.26
240.22
240.13
240.09
23
239.64
239.91
240.02
240.90
241.17
243.45
240.44
240.08
240.26
240.22
240.13
240.09
24
239.63
239.90
239.98
240.70
240.84
243.30
240.37
240.07
240.26
240.22
240.12
240.08
25
239.64
240.28
240.05
240.89
240.98
242.70
240.34
240.07
240.26
240.23
240.12
240.06
26
239.73
241.18
240.71
240.94
242.94
242.42
240.31
240.06
240.26
240.21
240.11
240.05
27
239.73
241.48
241.56
240.62
241.67
242.63
240.30
240.06
240.26
240.17
240.11
240.05
28
239.85
241.08
241.00
240.45
242.15
244.11
240.29
240.05
240.26
240.17
240.10
240.04
29
239.84
241.10
240.92
240.34
241.38
243.99
240.29
240.05
240.25
240.16
240.10
240.03
30
240.04
240.56
240.70
240.26
242.24
244.05
240.28
240.04
240.25
240.16
240.02
31
240.57
241.07
242.27
240.28
240.25
240.15
240.02
----------
--------------
Mean
239.75
240.11
240.49
240.64
241.89
243.52
241.41
240.15
240.27
240.20
240.16
240.10
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Max
240.04
241.48
241.74
241.46
244.57
248.61
247.11
240.28
240.28
240.24
240.21
240.24
248.61
Min
239.63
239.65
239.98
240.09
240.45
241.93
240.28
240.04
240.25
240.15
240.10
240.02
239.63
248.86
m. (MSL.) ,
239.62
m. (MSL.) ,
River Bed 237.64
m. (MSL)
246.11
m. (MSL.) ,
245.49
m. (MSL.) ,
Drainage Area 1271 Square Kilometers
at 11.00 Hours , on Sep 13 , 2011
Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Right Bank Elevation
Left Bank Elevation