Page 654 - Slide 1

620
Location : on left bank at Ban Hat Nai.
691 sq.km.
WATER YEAR : 2012
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
Drainge Area
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 mean of 5 readings
2006 to date
+31.337 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
2006 to date
-
2006 to date
Stable.
No overbank flow.
Records fair. Stage-discharge relation defined by 31 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 18.11 18.02 19.15 18.69 18.40 18.52 18.53 18.52 19.38 18.53 18.22 18.11
2 18.12 18.02 18.83 18.53 18.41 18.49 18.50 18.46 19.31 18.35 18.22 18.12
3 18.13 18.01 18.59 18.47 18.40 18.44 18.49 18.42 19.26 18.32 18.22 18.12
4 18.20 18.00 20.22 18.43 18.39 18.42 18.48 18.40 19.16 18.30 18.21 18.11
5 18.33 18.00 21.23 18.67 18.38 18.50 18.47 18.41 19.08 18.32 18.21 18.10
6 18.22 18.15 19.44 18.45 18.36 18.77 18.44 18.40 18.99 18.32 18.21 18.09
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Gage Height in Meter (MSL.) Water Year April 1, 2012 to March 31, 2013
7 18.17 18.31 19.16 18.46 18.36 18.83 18.43 18.45 18.93 18.30 18.21 18.08
8 18.12 18.23 19.03 18.52 18.34 18.89 18.52 18.41 18.88 18.30 18.23 18.08
9 18.11 18.18 18.71 18.48 18.31 18.69 18.51 18.37 18.81 18.29 18.21 18.08
10 18.10 18.14 18.63 18.43 18.29 18.54 18.50 18.34 18.78 18.29 18.19 18.20
11 18.10 18.11 18.59 18.41 18.29 18.60 18.49 18.33 18.71 18.28 18.17 18.31
12 18.23 18.10 18.57 18.43 18.23 18.58 18.57 18.37 18.56 18.27 18.17 18.39
13 18.24 18.08 18.50 18.40 18.22 18.60 18.48 18.52 18.42 18.26 18.17 18.45
14 18.15 18.11 18.45 18.36 18.21 19.26 18.59 18.44 18.40 18.26 18.17 18.22
15 18.12 18.10 18.51 18.34 18.21 19.90 18.43 18.33 18.38 18.26 18.17 18.13
16 18.12 18.19 18.69 18.31 18.25 19.93 18.42 18.33 18.38 18.26 18.16 18.12
17 18.16 18.17 18.80 18.30 18.35 19.51 18.41 18.34 18.37 18.27 18.15 18.11
18 18.30 18.14 18.48 18.31 18.47 19.04 18.43 18.33 18.36 18.27 18.15 18.11
19 18.23 18.17 18.42 18.45 18.45 18.87 18.40 18.36 18.35 18.27 18.14 18.10
20 18.19 18.16 18.40 18.51 18.38 18.79 18.37 18.41 18.34 18.27 18.14 18.17
21 18.16 18.12 18.38 18.45 18.40 18.81 18.36 18.43 18.33 18.26 18.14 18.11
22 18.13 18.09 18.33 18.38 18.35 18.86 18.34 18.48 18.33 18.26 18.14 18.14
23 18.12 18.04 18.32 18.33 18.47 19.16 18.33 18.43 18.36 18.25 18.13 18.11
24 18.11 18.04 18.31 18.32 18.41 19.61 18.63 18.47 18.46 18.24 18.13 18.09
25 18.10 18.03 18.30 18.31 18.60 19.48 18.75 18.55 18.40 18.25 18.12 18.08
26 18.09 18.27 18.29 18.33 18.46 19.31 18.52 19.25 18.34 18.30 18.12 18.07
27 18.09 18.35 18.30 18.41 18.46 19.03 18.45 19.60 18.32 18.28 18.11 18.07
28 18.09 18.48 18.32 18.43 18.49 18.65 18.42 21.09 18.31 18.23 18.11 18.07
29 18.09 18.67 18.40 18.75 18.53 18.53 18.39 19.49 18.31 18.23 18.06
30 18.08 18.47 18.81 18.41 18.50 18.49 18.39 19.57 18.31 18.22 18.06
31 18.52 18.38 18.48 18.39 18.34 18.22 18.05
---------- --------------
Mean 18.15 18.18 18.74 18.43 18.38 18.90 18.47 18.64 18.60 18.28 18.17 18.13
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Max 18.33 18.67 21.23 18.75 18.60 19.93 18.75 21.09 19.38 18.53 18.23 18.45 21.23
Min 18.08 18.00 18.29 18.30 18.21 18.42 18.33 18.33 18.31 18.22 18.11 18.05 18.00
22.44 m. (MSL.) ,
16.73 m. (MSL.) , River Bed 16.73 m. (MSL.)
27.36 m. (MSL.) ,
27.35 m. (MSL.) , Drainage Area 691 Square Kilometers
at 23.00 Hours , on Jun 4 , 2012 Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation