Analysis of Underwater Topographic Survey of Stilling Basin Based on Unmanned Survey System

Table 3

Comparison table of elevation parameters among selected sections of the bottom outlet stilling basin (unit: m).

Section no.	Location	Maximum height	Minimum height	Average height	Standard deviation	Reference value
1	Apron	354.33	354.12	354.20	0.09	354.00
2	Apron	356.04	354.08	355.15	0.86	354.00
3	Apron	354.88	354.06	354.45	0.38	354.00
4	Apron	354.84	354.09	354.26	0.33	354.00
5	Apron	354.47	354.09	354.19	0.16	354.00
6	Apron	354.16	354.05	354.13	0.05	354.00
7	Apron	354.20	354.10	354.14	0.04	354.00
8	Apron	354.15	354.11	354.13	0.02	354.00
9	End sill	366.93	366.89	366.91	0.02	367.00
10	Antiscour section	364.59	363.01	363.80	0.68	360.30
11	Antiscour section	365.26	362.19	364.26	1.23	360.30
12	Antiscour transition section	367.47	362.72	365.45	2.06	—

Note. The data in the table is based on the statistical calculation of multiple corresponding measurement points on each section.