Real-time IGW-NET Help

Land Use and Cover Parameters

What is it?

Land use and cover are key components to how water flows overland. For example more urban "developed" environments tend to have low permeability and storage, and fast overland flow (low Manning's roughness), while more natural "forest" or "wetland" environments tend towards higher permeabilities and storage, with slower flows (low Manning's roughness).

How to use it:

To specify landuse for overland flow in the current model zone check the box next to "Land Use and Cover" and set the parameter values.

Land use and cover parameters can be assigned to constant values (choose 'Constant' radio button), or they can be derived from a raster dataset ('Raster' radio button) using a lookup table - either from the MAGNET4WATER server, or loaded by a user.

If a raster from the click "Lookup Table" to open the landuse and cover lookup table.

DataCenter option

The default raster-based option is to import land use from the MAGNET4WATER Data Center. The data layer used at this time is: USGS Land Cover Database (NLCD), year 2016 - USA only.

Import Rasters

Select the 'Import' radio button and check the box next to 'Import' hyperlink to upload a land cover raster. The lookup table associated with the user-uploaded raster can be uploaded or configured by clicking "Lookup Table".

The 'DataNet' option allows users to import from MAGNET4WATER DataNET a WCS data layer as a raster file of the land use / land cover. A "linked" DataNET page needs to be opened to be able to send a WCS layer from DataNET into IGW-NET (a prompt will appear if that is the case, allowing the user to open a new DataNET page to be linked).

A direct link to WCS data layers (rasters) representing land use / land cover is available by clicking 'HSA Geoserver' (i.e., the selection in and transfer from DataNET is "bypassed"). A small interface will open that allows users to select the source and spatial resolution (original or resampled) to be used in modeling.

At this time, two WCS layers are available for direct use:
1 - USGS Land Cover Database (NLCD) - US only
2 - GLC Global Land Cover Dataset

Click the '?' to view the WCS layer metadata (original source and abstract).

Finalize/Move On

Click another tab to add/edit additional parameters or click "OK" to save changes and close editing window.