---
title: "Inflows"
canonical: "https://help.innovyze.com/space/infodrainage2021v1/16548374/Inflows"
format: markdown
---
**Inflows are sources** of flows for the Site. Click the individual Inflow links to the right to see specific input details.

### Runoff/Hydrograph

![image](media://6b3a339d-b6c1-44f2-90d9-53ac7d437bb1)

Details of the specific Inflow are entered.

### > Macro (anchor)

Pollution

#### Name

The name of the pollutant, as listed on the ** **[**Pollutants**](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2021v1/pages/16548117)** **form

#### Concentration

Enter the concentration of the pollutant as it washes off the Area or Hydrograph. This is a constant rate of concentration.

### > Macro (anchor)

Advanced

Applies only to Catchment Area and Green Roof

#### Runoff Reduction ( [Water Quality Calculator](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2021v1/pages/16548351) Method (NYS Design Manual)

#### [Methode de Caquot](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2021v1/pages/16548287) (Network Design)

Used in the Network Design calculations when the Caquot method is selected.

#### Runoff Path Length

Calculated as the longest diagonal path across the area outline (if available). User can overrule the value if required.

#### Catchment Slope

Calculated from the difference in level for longest diagonal path across area outline (if available and there is a surface) or defaults to 0.005%. User can overrule the value if required.

### [Rainwater Tank](https://help-innovyze.atlassian.net/wiki/spaces/infodrainage2021v1/pages/16548355)

The option to include a rainwater tank which takes flow at the source. Follow the link above for specification details.