Page 664 - Slide 1

628
Location : on left bank at the bridge.
105 sq.km. Drainge Area
WATER YEAR : 2014
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
Staff gage
+0.000 m. (MSL.)
B.M.-H.D.
On left bank about 63.60 meters from fourth staff gage. Elevation
5-time daily readings at 06.00, 09.00, 12.00, 15.00 and 18.00 hours.
Arithmetic mean of 5 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 25 discharge measurements made in 2014.
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
---------- -----------------
1 17.98 18.09 18.10 18.08 18.20 18.06 18.12 18.18 18.19 18.39 18.09 18.01
2 17.98 18.06 18.10 18.07 18.20 18.06 18.13 18.20 18.17 18.27 18.09 18.01
3 17.98 18.04 18.10 18.07 18.20 18.05 18.16 18.18 18.17 18.20 18.09 18.01
4 17.98 18.06 18.14 18.07 18.18 18.09 18.22 18.17 18.15 18.18 18.09 18.01
5 17.98 18.09 18.13 18.07 18.18 18.07 18.24 18.18 18.15 18.18 18.08 18.01
6 17.98 18.11 18.11 18.07 18.17 18.07 18.20 18.20 18.15 18.17 18.08 18.00
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Gage Height in Meter (MSL.) Water Year April 1, 2014 to March 31, 2015
7 17.98 18.09 18.10 18.05 18.17 18.12 18.24 18.37 18.14 18.14 18.07 18.00
8 17.98 18.08 18.06 18.05 18.17 18.13 18.28 21.18 18.14 18.13 18.06 18.00
9 17.96 18.07 18.04 18.07 18.17 18.13 18.25 20.34 18.13 18.13 18.06 18.00
10 17.96 18.07 18.04 18.08 18.15 18.10 18.19 18.85 18.12 18.13 18.06 18.10
11 17.96 18.08 18.04 18.08 18.14 18.10 18.17 18.51 18.13 18.11 18.06 18.10
12 17.96 18.10 18.04 18.05 18.15 18.10 18.16 18.34 18.12 18.11 18.05 18.10
13 17.95 18.11 18.12 18.04 18.06 18.14 18.14 18.25 18.23 18.10 18.05 18.10
14 17.95 18.18 18.12 18.02 18.06 18.15 18.12 18.21 21.02 18.09 18.04 18.10
15 17.95 18.08 18.11 18.03 18.09 18.17 18.14 18.17 18.96 18.38 18.04 18.10
16 17.93 18.08 18.10 18.18 18.10 18.17 18.35 18.26 18.43 18.41 18.04 18.09
17 17.95 18.08 18.10 18.10 18.10 18.15 18.40 18.30 18.40 18.38 18.04 18.09
18 17.95 18.07 18.10 18.07 18.09 18.15 18.35 18.25 20.08 18.24 18.03 18.09
19 17.95 18.07 18.10 18.06 18.08 18.13 18.25 18.20 19.41 18.17 18.03 18.09
20 17.95 18.07 18.08 18.05 18.07 18.13 18.20 18.51 18.67 18.15 18.03 18.08
21 17.94 18.07 18.06 18.05 18.07 18.13 18.20 18.46 18.38 18.14 18.03 18.08
22 17.94 18.07 18.07 18.05 18.08 18.13 18.17 18.39 18.53 18.14 18.03 18.08
23 18.12 18.12 18.12 18.05 18.08 18.12 18.13 18.39 18.43 18.13 18.02 18.06
24 18.12 18.14 18.12 18.05 18.08 18.12 18.10 18.30 18.43 18.12 18.07 18.06
25 18.12 18.13 18.14 18.07 18.24 18.12 18.10 18.26 18.47 18.12 18.02 18.06
26 18.12 18.12 18.12 18.09 18.27 18.13 18.14 18.25 19.17 18.11 18.01 18.01
27 18.10 18.12 18.12 18.25 18.29 18.13 18.23 18.24 19.27 18.11 18.01 18.00
28 18.10 18.11 18.11 18.23 18.28 18.13 18.23 18.22 18.58 18.11 18.01 18.00
29 18.10 18.11 18.09 18.18 18.17 18.03 18.26 18.21 18.29 18.11 18.00
30 18.10 18.11 18.08 18.20 18.09 18.03 18.21 18.19 18.19 18.10 18.00
31 18.11 18.20 18.07 18.20 18.16 18.09 18.00
---------- --------------
Mean 18.00 18.09 18.10 18.09 18.14 18.11 18.20 18.46 18.54 18.17 18.05 18.05
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Max 18.12 18.18 18.14 18.25 18.29 18.17 18.40 21.18 21.02 18.41 18.09 18.10 21.18
Min 17.93 18.04 18.04 18.02 18.06 18.03 18.10 18.17 18.12 18.09 18.01 18.00 17.93
22.53 m. (MSL.) ,
0.00 m. (MSL.) , River Bed 17.29 m. (MSL.)
25.20 m. (MSL.) ,
25.57 m. (MSL.) , Drainage Area 105 Square Kilometers
at 18.00 Hours , on Nov 8 , 2014 Annual Max Momentary Gage Height
Zero Gage at Bottom Elevation
Left Bank Elevation
Right Bank Elevation