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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

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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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December 20, 2006

December 21, 2006

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2. Case Study –Sediment Impact in Venezuela

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Los Corales

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Los Corales

Los Corales

Los Corales

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3. Case Study –The Muda River Flood

October 1998 Flood

Flood Prone Areas (Oct 1998 Flood)

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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

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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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5. River Engineering near Estuaries

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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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Thank You!

pierre@engr.colostate.edu