Page 668 - yearbook2011

634
Location : on left bank at Ban Hat Nai.
691 sq.km. Drainge Area
WATER YEAR : 2011
SOUTHERN PENINSULA EAST COAST
Khlong Rap Ro at Ban Hat Nai , Chumphon (X.248)
Lat 10 - 38 - 16 N Long 99 - 03 - 01 E
Amphoe Tha Sae Changwat Chumphon Ban Hat Nai
Staff gage
+16.734 m. (MSL.)
B.M.-H.D.
Near the automatic gage building. Elevation
5-time daily readings at 06.00, 09.00, 12.00, 15.00 and 18.00 hours.
Arithmetic means of 5 readings
2006 to date
Rating Operation
Period of Available Gage Records
Location BM
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+27.734 m. (MSL.)
Bench Mark
Type of Gage
2006 to date
-
2006 to date
Stable.
No overbank flow.
Records fair. Stage-discharge relation defined by 33 discharge measurements made in 2011.
Period of Rating
Rated by Flot
Rated by Current Meter
Stability of Channel Regimes
Overbank Flow Conditions
General Description
Date Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Annual
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1 18.44 18.14 18.32 18.17 19.28 18.81 18.78 18.43 18.27 18.16 18.68 18.13
2 18.39 18.13 18.34 18.17 19.02 18.73 18.89 18.42 18.27 18.29 18.50 18.12
3 18.35 18.25 18.33 18.16 18.80 18.65 20.06 18.41 18.27 19.54 18.50 18.12
4 18.34 18.22 18.31 18.16 18.71 18.63 19.59 18.41 18.27 18.57 18.38 18.13
5 18.34 18.41 18.27 18.15 18.65 18.62 19.33 18.40 18.28 18.40 18.31 18.23
6 18.33 18.26 18.27 18.15 18.63 18.59 19.01 18.40 18.27 18.32 18.27 18.20
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Gage Height in Meter (MSL.) Water Year April 1, 2011 to March 31, 2012
7 18.77 18.21 18.26 18.14 18.58 18.56 18.90 18.39 18.26 18.28 18.26 18.16
8 18.39 18.24 18.26 18.13 18.54 18.60 18.74 18.39 18.26 18.27 18.23 18.13
9 18.33 19.02 18.25 18.26 18.51 18.65 18.73 18.38 18.26 18.23 18.21 18.14
10 18.30 18.96 18.26 18.25 18.47 18.80 18.73 18.37 18.33 18.23 18.21 18.14
11 18.27 19.41 18.53 18.42 18.50 19.29 18.73 18.38 18.30 18.22 18.20 18.13
12 18.26 18.86 18.44 18.42 18.93 19.78 18.76 18.41 18.26 18.21 18.20 18.23
13 18.24 18.54 18.43 18.48 18.69 19.10 18.71 18.68 18.24 18.20 18.19 18.22
14 18.23 18.45 18.40 18.48 18.62 18.83 18.67 18.50 18.24 18.19 18.18 18.20
15 18.23 18.39 18.44 18.51 18.45 18.77 18.63 18.41 18.23 18.19 18.18 18.15
16 18.23 18.34 18.42 18.66 18.43 18.69 18.57 18.40 18.23 18.19 18.26 18.20
17 18.22 18.32 18.42 18.67 18.42 18.66 18.53 18.37 18.23 18.22 18.23 18.30
18 18.21 18.32 18.61 18.57 18.48 18.63 18.50 18.37 18.23 18.19 18.21 18.18
19 18.19 18.33 19.53 18.48 18.42 18.70 18.48 18.36 18.23 18.21 18.53 18.13
20 18.29 18.33 20.44 18.49 18.39 18.96 18.48 18.33 18.22 18.21 18.32 18.11
21 18.23 18.29 19.21 18.41 18.67 19.44 19.22 18.33 18.21 18.24 18.27 18.11
22 18.20 18.28 18.79 18.43 18.43 19.16 18.82 18.32 18.21 18.29 18.23 18.10
23 18.23 18.27 18.69 18.47 18.42 18.85 18.75 18.30 18.21 18.21 18.20 18.08
24 18.19 18.27 18.63 18.64 18.40 19.04 18.58 18.30 18.21 18.19 18.19 18.08
25 18.17 18.28 18.59 18.81 18.37 18.96 18.53 18.31 18.21 18.18 18.18 18.06
26 18.16 18.29 18.50 18.84 18.41 18.81 18.49 18.27 18.19 18.30 18.16 18.20
27 18.16 18.27 18.47 18.85 19.27 18.84 18.53 18.27 18.18 18.20 18.15 18.11
28 18.16 18.27 18.45 19.00 20.33 20.38 18.53 18.28 18.18 18.20 18.14 18.09
29 18.15 18.27 18.40 19.17 21.12 19.39 18.49 18.28 18.17 18.20 18.13 18.09
30 18.15 18.27 18.33 19.99 19.83 18.97 18.51 18.27 18.17 18.23 18.08
31 18.27 19.32 19.09 18.47 18.16 18.72 18.08
---------- --------------
Mean 18.27 18.39 18.55 18.54 18.80 18.93 18.77 18.37 18.23 18.30 18.27 18.14
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Max 18.77 19.41 20.44 19.99 21.12 20.38 20.06 18.68 18.33 19.54 18.68 18.30 21.12
Min 18.15 18.13 18.25 18.13 18.37 18.56 18.47 18.27 18.16 18.16 18.13 18.06 18.06
21.30 m. (MSL.) ,
16.73 m. (MSL.) , River Bed 16.53 m. (MSL)
27.36 m. (MSL.) ,
27.35 m. (MSL.) , Drainage Area 691 Square Kilometers
at 06.00 Hours , on Aug 29 , 2011 Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation