Calculate stable channel geometry

the inflowing sediment concentration by providing information about the supply

reach, i.e., the CT record. Note that when field 2 of the GC record is either

blank, a zero or a 1, the program will calculate the design sediment

concentration for the design water discharge; that is, all concentrations will be

calculated from the supply reach parameters. However, if a negative value other

than 1 is coded, it is interpreted as the water discharge to use for calculating the

design sediment concentration, i.e., the water discharge for the approach reach.

(See Appendix C, GC record.) Also note that the channel geometry, (CT record),

channel slope (ES record) and bed sediment gradation (PF record) must be

supplied for the approach channel when concentrations are to be calculated.

Test 8B contains two GC records which will allow SAM.hyd to calculate two

sets of stable channel dimensions with the only difference between the two being

the water discharge. This means of running is not currently available in

SAMwin, but may be accomplished by manually editing the input file. Test 8C

provides the sediment inflow concentration on the GC record, so is complete

without any supply reach information records.

T1 Test 8A

Calculate stable channel geometry

T1 Calculate Design sediment concentration using a reference reach

F#345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678

TR

CT

15

10

2

4

1

PF

1

.8

98

.48

50

.25

16

ES.00016

WT

60

GC 2680

-2680 .000162

3

1

.7

1

.7

SP 2.65

$$END

TI

TEST NO. 8B CALCULATE GEOMETRY USING COPELAND'S PROCEDURE

F#345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678

CT

15

10

1.65

3.0

4

1

2

1

2

PF

1

.8

98

.48

50

.25

16

ES162E-6

GC 3680

.000162

3

2

.7

2

.7

GC 6530

.000162

3

0

.05

0

.05

WT

60

$$END

TI

TEST NO. 8C CALCULATE GEOMETRY USING COPELAND'S PROCEDURE

F#345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678

GC 3680

100 .000162

3

2

.7

2

.7

PF

1

.8

98

.48

50

.25

16

WT

60

$$END

T1 8D

Stable Channel Design, Gravel Bed river option

T1

Cowan multiplier used for both design and supply reach

F#345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678

TR

CT

140

15

2

4

0

PF

16

8

98

4

65

2

45

PFC

1

20

.5

10

ES0.0017

WT

50

GC 2680

-2680 .000162

3

1

.7

1

.7

SP 2.65

GB

10

1.15

0.025 1.0000 0.0150

$$END

116

Chapter 6

Input Requirements and Program Output for SAM.hyd