18.104.22.168 Example 5
|Location of Example:
||150°8'43" East, 28°27'8" South
- Drains/Canals can be differentiated from natural watercourses by their linear structure.
- Natural Watercourses can be differentiated from Drain/Canals by remnant vegetation adjacent to stream path.
- Drains/Canals can be differentiated from Roads as they do not provide connectivity to the existing road network.
- If the Drain/Canal is completely dry it will appear lighter, similar to the surrounding soil and vegetation. The the edges will often appear much lighter, due to the excavated soil from construction.
- Drains generally start at a water source and can end at a Reservoir, Dam or Sea.
- Drains follow the topography of the land whereas roads may traverse hills and valleys.
- The use of multispectral imagery band combinations can aid in the interpretation and differentiation of water.
- In areas where there is irrigated crop farming Canals/Drains appear as regular structured networks which show a water flow hierarchy diminishing from source. They are often aligned with paddocks and have access tracks or roads running parallel to them.
|Figure: 22.214.171.124 Representation of Canals in association with surrounding features.
Topic contact: firstname.lastname@example.org Last updated: January 20, 2012