---
title: "Plot Option | Sediment Transport"
slug: "plot-option"
description: "Learn about the Plot Option which stores the channel section x and y data, predicted during the simulation, in an ascii file for designated sections."
tags: ["1D river modelling"]
updated: 2022-09-20T19:43:39Z
published: 2022-09-20T19:43:39Z
canonical: "help.floodmodeller.com/plot-option"
stale: true
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.floodmodeller.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Plot Option

The plot option stores the channel section x and y data, predicted during the simulation, in an ascii file for designated sections. This option can be specified in any location after the General System Parameters section. It can only be used in conjunction with channel section updating methods 2 and 3. The section data are written to files called 'filename.1', 'filename.2', etc. An example of the structure of this section of the file is shown below.

![](https://cdn.document360.io/5074bc26-a9ef-4bf4-b1de-a5c6ce628aca/Images/Documentation/SedimentTransportimagesimage155.jpg)

### Datafile Format - Plot Option

Line 1 : keyword 'PLOT'

Line 2 : n1

Line 3 to Line 2+n : labeli

where n1 is number of ensuing node labels (may be up to 5 labels) and labeli is the node labels of sections for which the data are required.

The figure below presents an example of a complete data file. Note that the text which is underlined are comments which are not usually included in the file. However, as lines between data blocks which start with a blank character are skipped over, the file as commented will be read correctly with these comments left in.

```none
   Title and general data
Example Sediment Input File
200.0     1.0       0.4       0.0010     3         0.5
7         SORTED
0.01      2650     4         0.0  }These 2 fractions are cohesive
0.05      2650     4         0.0  }(not present in the bed)
0.150     2650     1         0.2
0.550     2650     1         0.2
1.150     2650     1         0.2
8.150     2650     1         0.2
15.       2650     1         0.2
   Extreme sizes data
D0D100
0.005     40
   Finest two sizes are cohesive
COHESIVE
0.01      2.0       0.1
0.05      2.0       2.0
   Sediment inflow data
QCBDY
S1    }there are 7 pairs of Q:C data, C is in ppm
7
0.0       0
6.6       100
29.3      1100
32.6      1500
33.7      1820
35.3      2000
40.0      3000
NEW    }inflow is finer than default distribution
0.25
0.2
0.15
0.15
0.1
0.1
0.05
```