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Location : on left bank at Ban Sop Prap.
8,150 sq.km.
WATER YEAR : 2012
WANG RIVER BASIN
Wang River at Ban Sop Prap , Lampang (W.6A)
Lat 17 - 52 - 41 N Long 99 - 19 - 52 E
Amphoe Sop Prap Changwat Lampang Ban Sop Prap
Drainge Area
Water - stage recorder
+184.050 m. (MSL.)
B.M.-H.D.
On left bank near the gage site. Elevation
Recording
Arithmetic mean of 24 readings
2011 to date
+187.165 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
2011 to date
-
2011 to date
Fairly stable.
No overbank flow.
Records fair. Stage-discharge relation defined by 45 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
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1 185.17 184.87 185.81 185.24 185.21 185.81 185.92 185.39 185.14 184.83 184.89 184.73
2 185.15 184.92 185.81 185.27 185.21 185.93 185.93 185.39 185.13 184.83 184.95 184.74
3 185.11 185.01 185.79 185.31 185.21 186.30 185.93 185.39 185.12 184.84 185.00 184.76
4 185.07 184.98 185.77 185.35 185.21 186.69 185.94 185.40 185.11 184.85 185.06 184.77
5 185.05 184.96 185.75 185.38 185.21 186.83 185.94 185.40 185.10 184.81 185.10 184.80
6 185.15 185.00 185.73 185.40 185.20 187.01 185.90 185.41 185.08 184.76 185.13 184.81
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Gage Height in Meter (MSL.) Water Year April 1, 2012 to March 31, 2013
7 185.17 185.42 185.70 185.39 185.20 187.11 185.87 185.40 185.06 184.71 185.11 184.80
8 185.00 186.65 185.68 185.37 185.19 187.03 185.83 185.37 185.03 184.66 185.09 184.77
9 184.97 186.48 185.66 185.36 185.17 187.03 185.78 185.32 185.00 184.63 185.07 184.94
10 184.94 186.23 185.64 185.35 185.17 187.22 185.72 185.27 184.96 184.66 185.05 184.97
11 184.93 186.09 185.61 185.34 185.17 187.12 185.68 185.23 184.93 184.70 185.03 184.98
12 185.36 185.85 185.59 185.33 185.16 187.12 185.64 185.19 184.90 184.74 185.01 184.97
13 185.27 185.66 185.57 185.30 185.16 187.19 185.61 185.15 184.90 184.78 184.99 184.97
14 185.28 185.49 185.53 185.28 185.16 187.08 185.56 185.13 184.90 184.83 184.98 184.94
15 185 15 185.35 185.48 185.25 185.16 186.96 185.49 185.12 184.90 184.87 184.96 184.88 .
16 185.14 185.29 185.43 185.23 185.18 186.84 185.42 185.10 184.90 184.90 184.94 184.84
17 185.12 185.30 185.39 185.20 185.27 186.73 185.39 185.09 184.89 184.91 184.91 184.80
18 185.10 185.32 185.35 185.18 185.36 186.63 185.37 185.09 184.89 184.92 184.88 184.77
19 185.07 185.34 185.31 185.21 185.45 186.52 185.35 185.08 184.88 184.93 184.86 184.73
20 185.04 185.33 185.27 185.25 185.53 186.40 185.33 185.07 184.86 184.94 184.85 184.69
21 185.01 185.32 185.25 185.28 185.73 186.27 185.30 185.06 184.84 184.96 184.83 184.66
22 185.00 185.31 185.22 185.32 185.78 186.13 185.30 185.07 184.82 184.97 184.81 184.65
23 185.00 185.30 185.19 185.35 185.77 185.98 185.29 185.09 184.80 184.98 184.80 184.63
24 184.94 185.28 185.17 185.38 185.76 185.84 185.29 185.10 184.79 184.95 184.79 184.61
25 184.91 185.28 185.16 185.42 185.75 185.71 185.29 185.11 184.77 184.93 184.77 184.67
26 184.90 185.28 185.15 185.40 185.74 185.59 185.30 185.13 184.77 184.90 184.76 184.79
27 184.89 185.29 185.15 185.36 185.74 185.60 185.31 185.15 184.78 184.88 184.74 184.79
28 184.88 185.29 185.17 185.33 185.74 185.65 185.33 185.17 184.78 184.85 184.74 184.82
29 184.88 185.28 185.19 185.29 185.74 185.69 185.34 185.16 184.79 184.83 184.85
30 184.87 185.27 185.21 185.26 185.74 185.74 185.36 185.15 184.80 184.82 184.88
31 185.26 185.25 185.74 185.39 184.81 184.85 184.90
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Mean 185.05 185.41 185.46 185.31 185.41 186.46 185.55 185.21 184.92 184.84 184.93 184.80
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Max 185.36 186.65 185.81 185.42 185.78 187.22 185.94 185.41 185.14 184.98 185.13 184.98 187.22
Min 184.87 184.87 185.15 185.18 185.16 185.59 185.29 185.06 184.77 184.63 184.74 184.61 184.61
187.24 m. (MSL.) ,
184.05 m. (MSL.) , River Bed 180.86 m. (MSL.)
189.86 m. (MSL.) ,
189.80 m. (MSL.) , Drainage Area 8150 Square Kilometers
at 12.00 Hours , on Sep 10 , 2012 Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation