Page 118 - yearbook2011

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Location : on left bank at the bridge of Nong Bua Lamphu - Amphoe Non Sang Highway.
1,364 sq.km.
Amphoe Mueang Changwat Nong Bua Lamphu Ban Khong Po
WATER YEAR : 2011
CHI RIVER BASIN
Lam Phaniang at Ban Khong Po , Nong Bua Lamphu (E.68A)
Lat 17 - 04 - 47 N Long 102 - 27 - 11 E
Drainge Area
Staff gage
+194.730 m. (MSL.)
B.M.- Highways Dept.
On left bank downstream site at the footpath of the bridge. Elevation
3-time daily readings at 06.00, 12.00 and 18.00 hours.
Arithmetic means of 3 readings
1997 to date
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+201.740 m. (MSL.)
Type of Gage
Bench Mark
Location BM
Rating Operation
Period of Available Gage Records
1997 to date
-
1997 to date
Fairly stable.
Overbank flow starts at elevation +198.050 m.(MSL.) , records are channel flow only.
Records Fair. The concrete weir situated downstream from the gage site.
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
---------- -----------------
1 196.29 197.13 199.08 197.31 198.82 199.52 199.53 197.19 196.88 196.78 196.88 196.79
2 196.29 197.09 198.25 197.22 199.39 199.50 199.50 197.17 196.88 196.78 196.87 196.78
3 196.28 197.01 197.57 197.24 199.61 199.45 199.47 197.17 196.88 196.78 196.86 196.78
4 196.28 196.96 197.35 197.19 199.69 199.31 199.42 197.16 196.85 196.79 196.84 196.78
5 196.28 196.96 197.23 197.14 199.73 199.08 199.27 197.12 196.83 196.86 196.82 196.78
6 196.27 196.96 197.22 197.07 199.78 199.33 199.09 197.09 196.83 196.86 196.82 196.77
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7 196.27 196.93 197.82 196.99 199.79 199.60 199.01 197.07 196.84 196.83 196.83 196.76
8 196.27 196.91 198.57 197.01 199.76 199.69 198.97 197.06 196.86 196.83 196.86 196.74
9 196.27 196.89 199.00 196.97 199.65 199.72 198.84 197.06 196.83 196.83 196.88 196.74
10 196.27 196.90 199.31 197.01 199.21 199.70 198.32 197.07 196.82 196.81 196.87 196.80
11 196.26 196.89 199.30 197.89 198.40 199.68 197.89 197.11 196.82 196.80 196.86 196.83
12 196.28 196.89 198.84 198.51 197.80 199.71 197.65 197.18 196.82 196.77 196.84 196.85
13 196.71 196.99 198.22 198.88 197.61 199.71 197.61 197.17 196.82 196.81 196.83 196.93
14 196.84 197.18 198.04 199.12 197.85 199.72 197.67 197.12 196.82 196.84 196.83 196.98
15 196.84 197.36 197.84 199.16 198.02 199.81 197.90 197.08 196.82 196.87 196.83 196.98
16 196.83 197.41 197.60 198.98 198.13 199.88 197.94 197.05 196.82 196.88 196.83 196.93
17 196.83 197.24 197.51 198.64 198.18 199.96 197.89 197.02 196.82 196.86 196.83 196.93
18 196.83 197.17 197.79 198.39 198.50 200.04 197.88 197.00 196.81 196.84 196.83 196.92
19 196.82 197.21 198.04 197.97 199.03 200.00 197.82 196.98 196.81 196.87 196.83 196.89
20 196.81 197.42 197.89 197.46 199.51 199.92 197.70 196.97 196.81 196.86 196.81 196.89
21 196.80 197.47 197.72 197.38 199.67 199.85 197.58 196.92 196.80 196.86 196.81 196.88
22 196.80 197.38 197.62 197.27 199.77 199.80 197.47 196.92 196.80 196.83 196.80 196.87
23 196.82 197.27 197.40 197.27 199.87 199.78 197.37 196.93 196.79 196.83 196.80 196.86
24 196.89 197.17 197.19 197.40 199.87 199.77 197.32 196.92 196.79 196.88 196.80 196.85
25 196.92 197.10 197.09 197.65 199.83 199.67 197.29 196.91 196.79 196.91 196.80 196.83
26 197.02 197.21 197.23 197.98 199.75 199.44 197.28 196.91 196.79 196.90 196.80 196.83
27 197.02 198.08 197.57 198.39 199.70 199.06 197.23 196.91 196.79 196.90 196.79 196.83
28 196.97 198.64 197.76 198.53 199.62 199.12 197.21 196.91 196.79 196.90 196.79 196.83
29 196.80 198.89 197.65 198.54 199.63 199.40 197.20 196.90 196.79 196.89 196.79 196.82
30 196.83 199.08 197.44 198.38 199.62 199.52 197.18 196.90 196.78 196.86 196.82
31 199.23 198.31 199.57 197.19 196.78 196.86 196.81
---------- --------------
Mean 196.62 197.39 197.90 197.85 199.21 199.62 198.05 197.03 196.82 196.84 196.83 196.84
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Max 197.02 199.23 199.31 199.16 199.87 200.04 199.53 197.19 196.88 196.91 196.88 196.98 200.04
Min 196.26 196.89 197.09 196.97 197.61 199.06 197.18 196.90 196.78 196.77 196.79 196.74 196.26
200.06 m. (MSL.) ,
194.73 m. (MSL.) , River Bed 193.47 m. (MSL)
198.04 m. (MSL.) ,
199.12 m. (MSL.) , Drainage Area 1364 Square Kilometers
at 16.00 Hours, on Sep 18, 2011 Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Right Bank Elevation
Left Bank Elevation