Subaqueous geomorphology and delta dynamics of Lake Brienz (Switzerland): implications for the sediment budget in the alpine realm

Swiss Journal of Geosciences

Table 2 Applied settings for the high-resolution seismic survey in 2018

Pinger central frequency	3500 Hz
Trigger interval	500 ms
Band-pass filtering	Low cut: 1700 Hz Low pass: 1900 Hz High pass: 6500 Hz High cut: 6900 Hz
Boat velocity	7–8 km/h
Recorded time	500 ms
Sound velocity (water; ~ 10° C; assumed)	1450 m/s
Vertical resolution	¼ wavelength (~ 5–15 cm; resolution decreases with depth)
Max. penetration of the signal	35–40 m below lake floor