Xylem SonTek River Surveyor M9 - Page 101

SonTek, a Xylem brand
RiverSurveyor S5/M9 System Manual (February 2013)
91
Bottom Track – Applies data from the velocity transducers from the S5 (four 3 MHz
transducers) and M9 (four 3 MHz transducers and four 1 MHz transducers) to determine
water depth for the cross-sectional area.