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DEPARTMENT OF CIVIL ENGINEERING

Grid Contour Survey Report

19th March 2017

AT

Bortalav, Bhavnagar

Principal H.O.D.

Dr. H.M. Nimbark Prof. K.V. Purohit

Guided By:

Prof. Vijay G Parmar, Jr. Ajay B Nakum

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Content

(1) Acknowledgement 3

(2) Information 4

(3) Purpose of Survey 4

(4) What we learnt? 5

(5) Conclusion 8

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ACKNOWLEDGEMENT

We the students of civil engineering, are really thankful to our

Principal and the Head of the Department of civil branch of GMIT,

Dr. H.M. Nimbark sir and Prof. Kishan Purohit respectively, for the

knowledgeful survey work at Bortalav, Bhavnagar.

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General Information

The department of Civil Engineering has organized

a grid contour survey on 19th March 2017 at Valukad

village of Bhavnagar district.

Survey started at sharp 10:00 am. Prof. V.G.

Parmar, explained the importance, contour survey

application and all procedure of grid contour survey;

that services are offered with the help of contour lines

which are the virtual lines drawn on the surface that

represents a particular elevation.

Purpose of Conducting the Survey

Our main purpose for this survey is to be familiar with

industrial environment and to get practical knowledge

of surveying and use of its instruments in field. Also in

4th semester subject like Surveying requires knowledge

about how different instruments are used in the field,

so it is very much convenient to see all the practical

and components in real time work environment.

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What We Learnt

A contour line is a line that connects points of equal

elevation. Grid survey is usually carried out in order to

have an accurate record of the existing conditions of a

portion of flat land surface that is about to undergo

some type of construction activity.

Then the all the students were divided into three

groups at different stations. Students who had a good

observing dumpy level skill took reading at both

stations.

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The indirect method of grid contour survey was

adopted. In this method, 15m*15m area was plotted

and guide points were selected along of 3m lines and

their elevations were found.

The points were then plotted and contours were

then drawn by interpolation. While interpolating, it was

assumed that slope between any two adjacent guide

points to be uniform.

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The contour lines were drawn by interpolation. The method is used when the area to be surveyed is small and the ground is not undulating. At each line, at a distance of 1m, the elevations were collected. At all the lines, total 250 readings were taken. The elevation at the corner of the square was then determined by means of a level and a staff. Then, students took reading by the dumpy level for Computing distances and elevations of earthwork of their station.

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Conclusion

By going the grid contour survey map can be drawn, so

that one can select most economical or suitable site for

Construction.

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PREPARED BY Joshi Jay

Kishan Kabir

Trivedi Malay

ParMar Kishan

Yash Kajawadra