In case of Rise and Fall method for Reduction of level, following arithmetic checks are applied to verify calculations.
S B.S. - S F.S. = S Rise - S Fall = Last R.L. - First R.L.
With reference to Table 13.3:
S B.S. - S F.S. = 4.795 - 7.145 = - 2.350
S Rise - S Fall. = 1.130 - 3.480 = - 2.350
Last R.L. - First R.L.= 97.650 - 100.000 = -2.350
Table 13.3 Field book for Reduction of level
|
Staff Reading (m) |
Difference in elevation (m) |
H.I (m) |
R.L. (m)
|
Remarks
|
Points |
B.S. |
I.S. |
F.S. |
Rise |
Fall |
A |
2.365 |
|
|
|
|
102.365 |
100.000 |
B.M. |
S 1 |
0.685 |
|
1.235 |
1.130 |
|
101.815 |
101.130 |
T.P.1 |
S2 |
1.745 |
|
3.570 |
|
2.885 |
99.990 |
98.245 |
T.P.2 |
B |
|
|
2.340 |
|
0.595 |
102.365 |
97.650 |
|
S |
4.795 |
|
7.145 |
|
3.480 |
101.815 |
|
|
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