Erosion monitoring surveys are an essential tool for flood management, water modelling, water quality, coastline/lake shore/river bank management and resource consents. The surveys may consist of cross sections, Single Beam Echo Sounder (SBES) surveys, Multibeam Echo Sounder Surveys (MBES), sediment probing, ADCP surveys, imagery (photography & satellite) and Mobile Laser Scanning (MLS) of the adjacent topography. The vessels used range in size from jet ski's to purpose built survey vessels 5-8m in length fitted with state of the art positioning, motion sensors and portable survey computers.
Surveying coastlines, lake shores and rivers can require innovative solutions to counter access issues, strong currents, shallow depths, rapids, sedimentation and overgrown vegetation.
DML undertakes many of these surveys for local/regional councils and coastal/environmental scientists.