---
title: "Working with Storage nodes | Tutorials"
slug: "working-with-storage-nodes"
description: "Learn about working with storage nodes."
tags: ["1D urban modelling"]
updated: 2022-08-21T11:29:48Z
published: 2022-08-21T11:29:48Z
canonical: "help.floodmodeller.com/working-with-storage-nodes"
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.

# Working with Storage nodes

The lower half of the Storage  node **Properties Window** is shown below.

<img style="display:block;margin-left:auto;margin-right:auto;" src="https://cdn.document360.io/5074bc26-a9ef-4bf4-b1de-a5c6ce628aca/Images/Documentation/1DUrbanimagesurbanstorage.png" />

All parameters in the top of the form are identical to Junction nodes.

The  **Evaporation Factor** is the fraction of evaporation occurred. This can be set as a value between 0 and 1 by clicking in the field, typing the new value and clicking the Enter key. The default value is 0 (no evaporation); full evaporation occurs if this value is set to 1.

The  **Seepage Loss** field is set to NO by default. Clicking in the field provides access to 3 dots to the right, which then provide access to the **Storage Seepage Editor** window. Here you can specify soil properties that determine seepage loss through the bottom and sloped sides of the Storage unit.

It is necessary to specify a  **Storage Curve** to describe the Storage unit shape (i.e. how the surface area varies with water depth). This can either be in FUNCTIONAL or TABULAR form.

A FUNCTIONAL curve is of the form:
Area = A (Depth)<sup>B</sup>+ C
Where the coefficient A, exponent B and constant C are then provided in the  **Coefficient**,  **Exponent**	 and  **Constant** fields below.

A TABULAR curve is specified manually. Double-click in the **Curve Name** field to open the **Curve Editor**	and define a new curve.

:::(Error) (Top Tips to Define Curves)
If no curve is defined and the field is shown blank (or with a *), we recommend double-clicking the field to open the Curve Editor and entering a name for your curve, alongside the data required. It is also possible to name your curve in the field initially before double-clicking on this name, however the name then must be provided a second time in the Curve Editor window.

If you have previously defined a curve (and so a curve name is provided in the field), you can double-click the name to edit the details.

If you would like to define a new curve whilst retaining the previous curve, click in the field and use the Backspace key to delete the name so the field is blank. Then double-click to enter the Curve Editor, and enter your curve details (with a new name!) When you return to the Divider node properties, you will now notice your previous curve and new curve are both available from the drop-down. 
:::