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River Engineering
Dr. Pierre Y. JulienDept. of Civil and Environmental Engineering
Colorado State University, Fort Collins
Short CourseGadjah Mada UniversityYogyakarta, Indonesia
July 23, 2009
Objectives
Solutions to River Engineering Problems and Case-studies:
1. Kota Tinggi Flood;2. Sediment Impact; 3. Flood Control;4. River Engineering and Design;5. River Engineering near Estuaries.
1. Case Study –Kota Tinggi Flood
2
GemaGema Radar Radar CuacaCuaca PadaPada Jam 12.40 Jam 12.40 tengaharitengahari, 14 , 14 JanuariJanuari 20072007
December 18, 2006
December 19, 2006
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2003 Hydrograph @ Ldg Victoria
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
0 1000 2000 3000 4000 5000 6000 7000 8000
Hour
Dis
char
ge, Q
(m3 /s
)
Jan Feb Mac Apr May Jun Jul Aug Sep Oct Nov Dec
Q = 1340m3/s
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
6 24 42 60 78 90 108 126 144 162 180
Time (h)
Disc
harg
e (c
umec
)
50 yr (Qmax=1768 cumec)-Hec-Hms100 yr (Qmax=2001 cumec)-Hec-Hms50 yr (Qmax=1815 cumec)-JPZ100 yr (Qmax=2130 cumec)-JPZFlood 2003 (Qmax=1340 cumec)
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Channel realignment
Sand and Gravel Mining
Kampong Kubang Bedengong Kampong Lubok Segintah
River Sand Mining
Sand Mining Pumping Activity
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Longitudinal Flood Profile for Sg Muda (Q=1340m3/s)
Mud
a B
arra
ge
Mer
deka
B
ridg
eE
xpre
ssw
ay
Bri
dge
Rai
lway
Bri
dge B
ridg
e
Pipe
Bri
dge
Off-stream Sand and Gravel Mining
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•Diversion to Sg. Merbok not
recommended
• Likely sedimentation upstream of Muda
Barrage
4. Case Study –Retrofit of the Gupo Bridge Piers
AGU Hydrology days 2005
Rainfall distribution of Typhoon Maemi in Korea
13
Total rainfall of Typhoon Maemi from 9/8/2003 to 9/13/2003)
South Korea
Case-Study:Gupo Bridge during Typhoon Maemi in 2003
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GRAF ARAS AIR SG. JOHOR DI BANDAR KOTA TINGGI
JPS Negeri Johor Stage Hydrograph From 11/12/2006 To 25/01/2007
-1.00
0.00
1.00
2.00
3.00
4.00
5.00
6.00
11/12/200612/12/200613/12/200614/12/200615/12/200616/12/200617/12/200618/12/200619/12/200620/12/200621/12/200622/12/200623/12/200624/12/200625/12/200626/12/200627/12/200628/12/200629/12/200630/12/200631/12/20061/1/20072/1/20073/1/20074/1/20075/1/20076/1/20077/1/20078/1/20079/1/200710/1/200711/1/200712/1/200713/1/200714/1/200715/1/200716/1/200717/1/200718/1/200719/1/200720/1/200721/1/200722/1/200723/1/200724/1/200725/1/2007
DATA
Wat
er L
evel
(m)
Sg. Johor Kota Tinggi Alert Level 1.50m Warning Level 2.10m Danger Lavel 2.70m
5.0 m5.45 m
Nakdong River and NREB Unsteady modeling for the upstream of NREB
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Nakdong River Estuary Barrage
Quasi-steady state model
Upstream water level
Tide level
Water stage and discharge graph at Gupo bridge
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Example 3-D Model Mississippi
Courtesy - B. Wang
Example of Estuarine flow dynamics using SUNTANS
Salinity field (blue is fresh and red is salty) at the mouth of the Snohomish River, showing the oscillation of the salt wedge and wetting and drying of the intertidal regions
Erosion and River Mechanics Textbooks
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