Company

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Sun-Ah, Lee Sinae, Chae

Sophie, Klose Shi, Yundi

Jean, Girard Oriol, Raurell Thang, Nguyen

FLOOD ANALYSIS STUDY AT INCHEON GYO WATERSHED

GREEN TEAM

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OUTLINEOUTLINE

Introduction Green Team

Introduction Watershed

Modeling Tools

11

22

33

Future Work PlanFuture Work Plan44

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INTRODUCTION GREEN TEAM

Prof. NGUYEN THE Hung

Jean, GirardUniversité Nice Sophia

Antipolis

Jean, GirardUniversité Nice Sophia

Antipolis

Oriol, RaurellUniversitat Politècnica de Catalunya 

Oriol, RaurellUniversitat Politècnica de Catalunya 

Shi, YundiQingdao Technological

University 

Shi, YundiQingdao Technological

University 

Sun-Ah, LeeIncheon University

Sun-Ah, LeeIncheon University Thang, Nguyen

University of Danang  

Thang, NguyenUniversity of Danang  

MembersMembers

Leader:

Advisor:

Sinae, Chae Incheon University

Sophie, KloseBrandenburgische

Technische Universität Cottbus 

Sophie, KloseBrandenburgische

Technische Universität Cottbus 

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INTRODUCTION GREEN TEAM

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INCHEON-GYO WATERSHEDINCHEON-GYO WATERSHEDINCHEON-GYO WATERSHEDINCHEON-GYO WATERSHED

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INCHEONINCHEONINCHEONINCHEON

• Located in the mid-west Korea peninsula near Yellow Sea

• With both international port and international airport

• The third biggest city in Korea

• Population : 2,730,000

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Study area

Gaja WWTP

City HallGansuk station

Juan station

Incheon Gyo

Pump Station

Coastline before

1984

Study Area

Yellow Sea

Incheon Gyo

Pump station

Reclamation Area

INCHEON-GYO WATERSHEDINCHEON-GYO WATERSHED

• Total area: 34 km2

• The study area has been reclaimed from the sea

in 1985 (blue circle)

• Reclamation area used for industry &residences

• Culvert slope is very mild

INCHEON-GYO WATERSHEDINCHEON-GYO WATERSHEDINCHEON-GYO WATERSHEDINCHEON-GYO WATERSHED

• Linked with the sea through two retention ponds

• Complicated drainage network

• There are 4 main drainage networks

• One drainage network is linked with the sea directly

• The other networks are linked with the reservoir

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Modeling ToolsModeling Tools

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INTRODUCTION Arc Gis MODELINTRODUCTION Arc Gis MODEL

Geographic Information System (GIS)

• Digital Elevation Map (DEM)

• Triangulated Irregular Network (TIN)

ASCII

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DIGITAL ELEVATION MAP (DEM)DIGITAL ELEVATION MAP (DEM)

DEM

TIN File

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DIGITAL ELEVATION MAP (DEM)DIGITAL ELEVATION MAP (DEM)

Purpose of DEM Essential piece of information in

determining the flow direction

A

B’B

A’

A’A

B

B’

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INTRODUCTION MOUSE MODELINTRODUCTION MOUSE MODEL

Features Analysis urban drainage and sewer water

1 Dimensional Program for the Open

Channel

Node and Pipe → represented Point and

Line

Possible to analyze the Unsteady Flow

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PROGRAM COMPOSITIONPROGRAM COMPOSITION

2Part Concept

SURFACE RUNOFF Module• Time-Area Method

• Kinematic Wave, Non- Linear reservoir

• linear reservoir

• Unit Hydrograph Surface Runoff model, UHM

PIPE FLOW Module

• Kinematic Wave Equation

• Diffusion Wave Equation

• Dynamic Wave Equation

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INTRODUCTION SOBEK MODEL

1D vs 2D MODELS1D vs 2D MODELS

1D models: good in modeling rivers, pipes that have a 1D dimension

2D models : Good in modeling fooding plains and river confluences and edifications.

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• 1 D : River or pipes

• 2 D : Flooding plain

INTERACTION 1D - 2D !

SOBEK: interaction 1D-2D

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FUTURE WORK PLANFUTURE WORK PLAN

OPTION 2: Increment the manning coefficient of the buildings:

- Reduce the velocity of the water almost to 0.

- Takes in to account the volume of water entering to the buildings

MORE PRECISE SOLUTION !

Results:Results:

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1D and 2D Maps of:

-Velocity of the water

-Water Level

How to reduce the flooding?How to reduce the flooding?

Study and modify :

Sewerage slopes

Sewerage diameter

Others

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Re-run the model!

Conclusions of the work doneConclusions of the work done

Working in group is more difficult if is overseas.

Next days we have the opportunity to work together in the same table so..

we are going to learn from each other and..

THE RESULTS WILL IMPROVE !

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Thank you！Thank you！