User:Ssim

Disclaimer

This Wiki has been produced for the GEOM4008 Advanced Topics in Geographic Information Systems course at Carleton University. It is a tutorial to showcase the methods of calculating and illustrating the effects of terrain analysis for urban storm water modelling using Mapwindow in Surrey. This tutorial should aid in the user's ability to replicate the results shown using Mapwindow's plugins and tools.

Introduction to Mapwindow

Mapwindow is an opensource software which is includes a ready-to-use spatial data viewer and a geographic information system which can be modified and extended using plugins. The open source software will be exclusively used is MAPWINDOW along with the Hydro Desktop application. MAPWINDOW is a ready-to-use spatial data viewer and geographic information system that can be modified and extended using plugins and is able to accurately illustrate watershed delineation in 3D. The Hydro Desktop is a free software tool for finding time series of water and climate data which submitted by the hydrologic research community and other experts around the world. The MAPWINDOW toolset will be used to illustrate and query hydro-geomorphological features in the catchment areas with Surrey.

Definitions

Storm water runoff- The changes in the hydrological cycle due to paved streets and buildings which speed the delivery of both water and pollutants to waterways(Columbia, 2005).

Watershed- A watershed is an area of land in which all of the water beneath it or drains off in it is concentrated into the same place (Agency, 2012).

Introduction to tutorial

This project will focus on the watershed delineation of Surrey, BC to construct a feasible urban storm water model. The project will go into using the "watershed delineation plugin" to delineate watersheds and illustrate and query hydrogeomophological features in the catchment areas of Surrey.This tutorial should provide new users with the information required in using Mapwindow to be able to effectively conduct watershed delineation analyses using raster data.

Data

The first step is to download a fully processed digital elevation model (DEM) for the region you are interested in. This data and all other Drainage and Storm Water Infrastructure data can be found at Drainage and Storm Water Infrastructure data was obtained from the City of Surrey Open Data website and the Geogratis website.

The following data was downloaded:

- catchments - detention ponds - devices - laterals/connections - mains and culverts - manholes - nodes - offset lines - open channels (ditches, creeks, rivers)

A hydrography surface model (CDSM) should be downloaded from http://geogratis.gc.ca/.

Methods conducted using Mapwindow

Download the software

Before starting you will need to download the software. Mapwindow is found at http://www.mapwindow.org. The hydro desktop can be found on the same website.

Mapwindow Setup

First, have the data you intend to use on hand before setting up the software, and be aware in which folder the data is found in. Make sure the Mapwindow software is properly installed on your computer and test it to make sure it is fully functional. Click on the Project -> New tab to open a brand new project. Media:Example.ogg

Sources

Agency, U. E. (2012, March 03). What is a Watershed? Retrieved from U.S. Environmental Protection Agency : http://water.epa.gov/type/watersheds/whatis.cfm

Columbia, G. o. (2005, May). Water Quality. Retrieved from Environmental Protection Division: http://www.env.gov.bc.ca/wat/wq/nps/NPS_Pollution/Stormwater_Runoff/sw_main.htm