User Forum of Software BASEMENT

lorenzo.scopetani

User

From: florence

Registered: 2021-07-28

Posts: 9

external source of sediment and large deposition

Good morning
I must analys a 2d sediment transport model with external source of sediment.
I defined the soil of the river as D50=166 mm and for sediment discharge of the external source was D50=40 mm. So I setted multigrain formula, with mixture as 0-100 for the river soil and 100-0 for the external source.
First I simulated the 2d sediment transport without the external source and it runned well, but now with the external source I had all the deposition in the cell where I set the external source, with more 80m deposition.
Do you suggest me some criteria or methods to insert this sediment discharge correctly?
The sediment discharge is quite intense:

time     VALUE
0    0
7200    0
8784    0.017
10008    0.11
10584    0.22
11304    0.41
11412    0.44
11844    0.56
12024    0.6
13104    0.64
13752    0.56
14724    0.43
16092    0.31
17676    0.22
21132    0.13
23796    0.09
27396    0.06
31500    0.03
35388    0.017
36432    0.005
37000    0
39000    0

and the inflow BC is:

time    VALUE
0    15.5
600    20.3
1200    25.7
1800    31.6
2400    37.8
3000    44.3
3600    51.1
4200    58.1
4800    65.2
5400    72.3
6000    79.6
6600    86.8
7200    94
7800    101.1
8400    108.1
9000    115
9600    121.8
10200    128.5
10800    135.1
11400    141.5
12000    147.8
12600    154
13200    160.1
13800    166
14400    171.8
15000    177.4
15600    183
16200    188.4
16800    193.7
17400    198.9
18000    203.9
18600    208.9
19200    213.7
19800    218.5
20400    223.1
21000    227.7
21600    232.1
22200    236.5
22800    240.8
23400    244.9
24000    248.9
24600    252.5
25200    255.4
25800    257.2
26400    257.4
27000    255.4
27600    250.7
28200    242.7
28800    230.4
29400    213.7
30000    193.4
30600    170.7
31200    146.6
31800    122.8
32400    100.7
33000    81.1
33600    64.5
34200    50.8
34800    39.6
35400    30.8
36000    24.1
36600    18.9
37200    14.9
37800    11.8
38400    9.3
39000    7.4

Thanks very much

Last edited by lorenzo.scopetani (2021-10-22 08:41:55)

Matteo Facchini

Developer

From: Trento

Registered: 2014-09-05

Posts: 278

Re: external source of sediment and large deposition

You can try and add the gravitational  transport in the cells where you set your source.
Cheers
Matteo