0

1

2

3

Before

After

S1 S2

S3

S4 S5

S7

S6

O1

RainGage

4

Date(M/D/Y) Time(H:M)

Start Analysis on 01/01/2007 00:00

Start Reporting on 01/01/2007 00:00

End Analysis on 01/01/2007 12:00

Start Sweeping on 01/01

End Sweeping on 12/31

5

kt

cc effff )( 0

f Infiltration rate at time (mm/h)

cf

0f

Constant infiltration rate after the soil has been saturated (mm/h)

Initial infiltration rate (mm/h)

k Decay constant specific to the soil (1/h)

6

7

Days Time(H:M:S)

Reporting 0 00:01:00

Runoff: Dry Weather

0 01:00:00

Runoff: Wet Weather

0 00:01:00

Routing 60 seconds

8

Connections

Subcatchment Outlet Junction

S1 J1

S2 J2

S3 J3

S4 J7

S5 J10

S6 J11

S7 J10

Inlet Node

Outlet Node

C1 J1 J5

C2 J2 J11

C3 J3 J4

C4 J4 J5

C5 J5 J6

C6 J7 J6

C7 J6 J8

C8 J8 J9

C9 J9 J10

C10 J10 J11

C11 J11 O1

9

Development Name Rain Gage

Total Area (ha)

Pcnt. Imperv

(%)

Width (m)

Pcnt. Slope (%)

Pre-

S1

Rain gage

1500 0.0 460 2

S2 1600 3.0 490 2

S3 1500 5.0 430 2

Post-

S4 1000 56.8 700 3.1

S5 800 63.0 490 2

S6 700 87.7 210 3.1

S7 500 95.0 270 3.1

Width = subcatchment area / length of the longest overland flow

10

N-Imperv N-Perv Dstore-Imperv

Dstore-Perv

%Zero-Imperv

0.015 0.24 0.06 0.3 25

MaxRate MinRate Decay DryTime MaxInfil

4.5 0.2 6.5 7 0

Subarea

Infiltration method: Horton

11

Parameter Description

N-Imperv Manning’s n for overland flow over the impervious portion of the subcatchment

N-Perv Manning’s n for overland flow over the pervious portion of the subcatchment

Dstore-Imperv

Depth of depression storage on the impervious portion of the subcatchment

Dstore- perv

Depth of depression storage on the pervious portion of the subcatchment

% Zero-Imperv

Percent of the impervious area with no depression storage

12

Lengh (m)

Manning N

Shape Max. Depth (m)

Inlet Offeset

(m)

Intial Flow (cms)

C1 50 0.05

CIRCLE

1 6 6

C2 50 0.016 1 0 0

C3 30 0.016 1 0 0

C4 40 0.05 1 0 0

C5 50 0.05 1 0 0

C6 40 0.05 1 0 0

C7 30 0.016 1 0 0

C8 50 0.05 1 0 0

C9 50 0.05 1 0 0

C10 40 0.05 1 0 0

C11 30 0.016 1 0 0

13

click

Double click

14

① General ② Dates ③ Time Steps

Use given conditions to set-up the options

15

Rain Gage

Subcatchment

Outfall

Click the icon to create Rain Gage, Subcatchment, Outfall,

Junction, Conduit

Junction

Conduit

16

Add object toolbar at menu (in case of, cannot see toolbar)

1. Click ‘View’

2. Click ‘Object’ from ‘Toolbars’

17

Diagram of study area map

S1

S3

S2

S4 S5

S7

S6 O1

J1 J2

J3 J4 J5 J6

J7

J8 J9

J10

J11

C1

C3 C4 C5 C6

C7 C8

C9

C10

C11

C2

Subcatchment

Junction

Conduit

Outfall

18

Click the junction icon and click on the map to create

Create 11 junctions as the following figure

19

Click the outfall icon and click on the map to create

Create an outfall as the following figure

20

1. 클릭

Click the subcatchment icon and click on the map to create

Left click to create the form, right click to complete creation

Create 7 subcatchemnts

21

Click the conduit icon

Click inlet junction for the starting point and outlet junction for

the ending point

Create 11 conduits

1. click inlet junction

2. click outlet junction

22

1. 클릭

Change names of subcatchments, junctions,

and conduits

Open properties of subcatchment

Enter the name of outlet

Subcatchment S1 is connected to junction J1

23

24

click

click

Insert rainfall data

enter name

25

Time Rainfall 0:00:00 0.29

0:05:00 0.33

0:10:00 0.38

0:15:00 0.64

0:20:00 0.81

0:25:00 1.57

0:30:00 20.85

0:35:00 15.18

0:40:00 0.71

0:45:00 0.42

0:50:00 0.35

0:55:00 0.3

1:00:00 0.2

1:05:00 0.19

1:10:00 0.18

1:15:00 0.17

1:20:00 0.17

1:25:00 0.16

1:30:00 0.15

1:35:00 0.15

1:40:00 0.14

1:45:00 0.14

1:50:00 0.13

1:55:00 0.13

Insert rainfall data

26

② Outfall ① Rain Gage

Insert values below

Select time-series for rain gage

Outfall Invert EL. : 510 m

27

③ Subcatchment

1. Insert given values for each subcatchment

2. Insert values for infiltration

3. Connect junction(outlet)s and raingage for all

subcatchments

클릭

2.

3.

28

④ Junction 1. Insert values

Junction Invert EL.

(m)

J1 520

J2 519

J3 518

J4 517

J5 516

J6 513

J7 514

J8 513

J9 512

J10 512

J11 510

29

⑤ Conduit 1. Insert given values

2. Select shape of conduit & insert values

3. Check the in/outlet nodes are connected correctly

2.

click

3.

30

Click run

31

click Check the flow between junctions

select a node element from the map then click +

Check profile plot

32

click

1. Select start/end date 2. Select object and variable for x axile 3. Select object and variable for y axile

Check result

1.

2. 3.

33

click

Check results

1.

2.

3. 4.

1. Select start/end date 2. Select time format and objects 3. Select variables 4. Select an element from map then click +

34

click 1. Select start/end date 2. Select time format and objects 3. Select variables 4. Select an element from map then click +

Check results

1.

2.

3.

4.

35

1. Change the condition of C2

2. Insert the value for Outlet Offset and Initial Flow as given table below

Length (m)

Manning N

Shape Max. Depth (m)

Inlet Offset (m)

Initial Flow (cms)

Outlet Offset (m)

C1 50 0.05

CIRCLE

1 6 6 0

C2 50 0.016 1 0 6 6

C3 30 0.016 1 0 0 0

C4 40 0.05 1 0 0 0

C5 50 0.05 1 0 0 0

C6 40 0.05 1 0 0 0

C7 30 0.016 1 0 0 0

C8 50 0.05 1 0 0 0

C9 50 0.05 1 0 0 0

C10 40 0.05 1 0 0 0

C11 30 0.016 1 0 0 0

36

3. Check results

Profile plot Time series plot

You can check flood

at J11 by changing

the conditions