Aquaculture Engineering

Methods of sloping ground - Indirect Method

Unit 1- Surveying

Chaining on uneven or sloping ground

Indirect method

(i) In the case of regular slope the sloping distance and sloping angle can be measured and using this horizontal distance can be calculated.

L₁ be the measured inclined distance between AB.
θ₁ = Slope of the line AB with horizontal
The horizontal distance D₁ = L₁ Cos θ₁
Similarly for BC = D₂ = L₂ Cos θ₂
Total length = D₁+D₂

(ii) Difference in level Measured

The Difference in the level between the points is measured with the help of a levelling instrument and the horizontal distance computed using the below formula.