Examples

M5-Ex1 Trace the figure and sketch contour lines having contour intervals of 10m. Number and broaden every fifth contour line including 400m line.

Figure M5-Ex1

M5-Ex2The elevation for the gridded area shown in Figure Ex 1 are as follows :

F
690
709
726
732
735
740
743
747
E
696
715
729
736
740
737
739
740
D
702
723
733
742
737
737
745
737
C
707
726
732
732
729
740
740
730
B
709
725
723
722
730
738
731
727
A
711
721
715
715
732
730
719
722
 
1
2
3
4
5
6
7
8

P = 741 Q = 751

Draw contour line at C.I. of 5 m and broaden every fifth contour line.

Figure M5-Ex2

M5-Ex3 (i) Describe the topography of the area of the given contour map indicating salient relief features - Spur, Cliff, Saddle, Steep Slope Valley etc.

(ii) Draw the profile along A1 - A2 and A3 - A4, given in Map and ascertain the intervisibility between them.

(iii) Suggest the alignment of a road from starting point S to hill top T, if the limiting gradient is 1:30 .

(iv) Propose an alignment for a Railway line from S1 to T1 with a limiting gradient of 1:100.

Figure M5-Ex3

M3-Ex4 The areas enclosed within contour lines and along the upstream face of a dam are as

Contour (m)
1000
990
980
970
960
950
940
930
920
Area (hectare)
30.55
25.70
20.0
16.05
13.54
9.65
5.55
0.8
0.05

It is proposed that the storage capacity of the reservoir between the loest draw down (L.D.D) and top water level (T.W.L) should be 80 million cubic meter, if the L.D.D. id to be 925 m, what would be the T.W.L for full storage capacity.

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