Flow arrow helps drainage designers to identify low points and propose drainage gully pots and kerbs drainage systems accordingly. If flat spots are found within the contour map, it means those locations could create ponding and need to redesign to eliminate flat spots.ģ. In Rural Highways or Urban Road Projects, contour maps assist designers to check the flat spots, flow arrows, steep slopes, uneven surfaces over the junction.Ģ. Contour Maps are created to check the design proposals. Design organisations use this information’s plan new infrastructure projects in such a way that further damage or further flooding can be avoided.ġ. Meteorological Departments use Contour Maps to inform the public about flood-prone locations. Low-lying areas (close to rivers or canals) are prone to flooding.So generating a contour map of existing ground helps designers to plan the proposed drainage network accordingly. In an urban or rural setting, low-lying locations are commonly used for drainage outfalls and connect to existing rivers or ponds or canals.This will help designers to design the levels of the proposed road or railway lines in a similar manner to minimise extensive cuttings or embankments. In order to design a new physical infrastructure, it is very important to know where are the low points or high points across the project area.Purpose of Contour Maps of Existing Ground:
It assists designers to understand highpoints, low points, hilly terrain, valleys and flat spot locations. What is the Purpose of Contour Maps?Ĭontour Map explains the topography of the ground surface. When the contour lines are drawn underwater, they are termed as submarine contours. In simple words when we analyse a 3D surface and observe some equally elevated points and draw a line joining those equal elevation points, the line is called a contour line. What is Contour?Ĭontours are imaginary lines passing through equal elevation points on the ground surface, normally created by using the triangulation surface model. What are the factors affecting Contour Interval?Īs a Civil Engineer, you must have seen Contour Maps, but do you know what is Contour maps and Contour intervals?
INDEX CONTOUR HOW TO
How to Read Contour Lines and Calculate Contour Interval? Purpose of Contour Maps for Proposed Surface:
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