Page 636 - Slide 1

602
Location : on left bank at the bridge.
105 sq.km. Drainge Area
WATER YEAR : 2012
SOUTHERN PENINSULA EAST COAST
Khlong Tha Di at Ban Tha Yai , Nakhon Si Thammarat (X.55)
Lat 08 - 23 - 52 N Long 99 - 50 - 14 E
Amphoe Lan Saka Changwat Nakhon Si Thammarat Ban Tha Yai
Water - stage recorder
+0.000 m. (MSL.)
B.M.-H.D.
On left bank about 63.60 meters from fourth staff gage. Elevation
Recording
Arithmetic mean of 24 readings
1967 to date
Rating Operation
Period of Available Gage Records
Location BM
Basis of Mean Daily Gage Height
Gage Reading Frequency
Zero Gage at Bottom
+24.748 m. (MSL.)
Bench Mark
Type of Gage
1967 - 1971 , 1989 to date
-
1967 - 1971 , 1989 to date
Fairly stable.
No overbank flow.
Records fair. Stage-discharge relation defined by 27 discharge measurements made in 2012.
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 18.19 18.15 18.14 18.06 18.04 18.08 18.18 18.13 19.41 18.57 18.05 18.15
2 18.22 18.14 18.14 18.06 18.04 18.03 18.21 18.14 18.69 18.45 18.05 18.14
3 18.20 18.13 18.15 18.06 18.03 18.03 18.18 18.23 18.42 18.37 18.05 18.13
4 18.19 18.15 18.18 18.12 18.03 18.03 18.17 18.22 18.35 18.39 18.04 18.12
5 18.18 18.14 18.25 18.19 18.02 18.05 18.16 18.17 18.29 18.31 18.04 18.14
6 18.16 18.12 18.44 18.13 18.02 18.07 18.15 18.15 18.24 18.31 18.04 18.21
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Gage Height in Meter (MSL.) Water Year April 1, 2012 to March 31, 2013
7 18.15 18.14 18.44 18.10 18.02 18.06 18.15 18.15 18.21 18.26 18.04 18.24
8 18.15 18.13 18.37 18.20 18.02 18.08 18.15 18.14 18.20 18.21 18.11 18.22
9 18.20 18.12 18.36 18.17 18.02 18.09 18.18 18.14 18.18 18.19 18.12 18.21
10 18.20 18.11 18.30 18.11 18.02 18.21 18.19 18.13 18.16 18.19 18.12 18.24
11 18.18 18.10 18.24 18.12 18.01 18.22 18.12 18.18 18.12 18.20 18.11 18.21
12 18.18 18.10 18.15 18.09 18.01 18.16 18.12 18.34 18.12 18.20 18.13 18.17
13 18.17 18.10 18.16 18.06 17.99 18.14 18.11 18.25 18.10 18.19 18.13 18.14
14 18.17 18.09 18.15 18.06 17.94 18.14 18.12 18.25 18.24 18.19 18.15 18.12
15 18.18 18.09 18.11 18.04 17.90 18.15 18.12 18.25 18.96 18.19 18.13 18.11
16 18.14 18.10 18.07 18.04 17.88 18.14 18.12 18.18 18.90 18.19 18.13 18.11
17 18.14 18.10 18.06 18.04 17.86 18.13 18.11 18.17 18.56 18.13 18.13 18.11
18 18.15 18.12 18.06 18.06 17.84 18.12 18.11 18.16 18.40 18.11 18.13 18.10
19 18.16 18.11 18.05 18.05 17.85 18.12 18.14 18.15 18.29 18.11 18.13 18.10
20 18.18 18.09 18.05 18.05 17.91 18.12 18.17 18.14 18.21 18.10 18.12 18.10
21 18.17 18.08 18.07 18.05 17.92 18.11 18.20 18.12 18.28 18.09 18.12 18.09
22 18.16 18.08 18.07 18.05 18.01 18.09 18.21 18.11 18.34 18.12 18.12 18.08
23 18.16 18.08 18.07 18.04 18.04 18.06 18.24 18.11 18.81 18.10 18.12 18.08
24 18.16 18.09 18.06 18.06 18.10 18.06 18.26 18.12 19.00 18.09 18.12 18.08
25 18.19 18.18 18.05 18.08 18.16 18.07 18.25 18.15 18.81 18.08 18.15 18.08
26 18.17 18.17 18.05 18.06 18.35 18.13 18.27 18.23 18.82 18.07 18.22 18.07
27 18.15 18.23 18.05 18.06 18.48 18.14 18.24 18.22 18.58 18.07 18.14 18.07
28 18.14 18.24 18.08 18.05 18.37 18.19 18.22 18.31 18.45 18.07 18.16 18.16
29 18.15 18.23 18.08 18.06 18.26 18.16 18.19 18.30 18.38 18.10 18.20
30 18.15 18.22 18.07 18.06 18.19 18.20 18.13 18.30 19.40 18.07 18.19
31 18.19 18.06 18.16 18.09 18.89 18.06 18.19
---------- --------------
Mean 18.17 18.13 18.15 18.08 18.05 18.11 18.17 18.19 18.51 18.19 18.11 18.14
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Max 18.22 18.24 18.44 18.20 18.48 18.22 18.27 18.34 19.41 18.57 18.22 18.24 19.41
Min 18.14 18.08 18.05 18.04 17.84 18.03 18.09 18.11 18.10 18.06 18.04 18.07 17.84
20.21 m. (MSL.) ,
0.00 m. (MSL.) , River Bed 17.36 m. (MSL.)
25.20 m. (MSL.) ,
25.57 m. (MSL.) , Drainage Area 105 Square Kilometers
at 12.00 Hours , on Dec 1 , 2012 Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation