Sonar-Based Sediment Mapping in German Marine and Coastal Waters - PowerPoint PPT Presentation

Sonar-Based Sediment Mapping in German Marine and Coastal Waters Dr. Manfred Zeiler (BSH) & Dr. Hans-Christian Reimers (LLUR S-H)

Exclusive Economic Zone (BSH) 2012 Agreement among the Federal Agency for Nature Protection (BfN) and Federal Maritime and Hydrographic Agency (BSH) 2012 - 2014 Phase 1 2014 – 2017 Phase 2 2017 - ? Phase 3 (planned) BSH supported by Alfred-Wegener Institute for Marine and Polar Reseach (AWI), Baltic Sea Research Institute Warnemünde (IOW) Christian-Ablrechts-University of Kiel (CAU) and Senckenberg am Meer (SaM) close cooperation with State agencies of Schleswig-Holstein, Lower Saxony and Mecklenburg-Vorpommern Dr. Manfred Zeiler (BSH) & Dr. Hans-Christian Reimers (LLUR S-H) 2

Territorial Waters (LLUR) 2004 Start of hydroacoustic mapping with accoustic ground discrimination system Echo plus on MS Haithabu Habitat mapping with sidescan sonar in Schleswig-Holstein 2009 - North Sea / North Frisia Baltic Sea / Fehmarn, Kiel Bight, … 2009 - LLUR in close cooperation with Christian-Albrechts-University of Kiel (CAU and FTZ) and R&D Project WIMO (together with Senckenberg am Meer (SaM) and Alfred-Wegener Institute for Marine and Polar Reseach (AWI)) 3

Exclusive Economic Zone (BSH) Milestone Technical Guideline for Sediment Mapping Using Sonars Technical Guideline • Based on Side Scan Sonar (Cost-Value Analysis) • Multibeam Echosounders: Implementation in Future Updates of the Guideline • Requirements for Collecting and Processing Backscatter Data as well as Interpreting Backscatter Mosackings • Catalogue of Backscatter Images for Different Sediment Types to Support Interpretation Dr. Manfred Zeiler (BSH) & Dr. Hans-Christian Reimers (LLUR S-H) 4

Clastic Sediment Types Dr. Manfred Zeiler (BSH) & Dr. Hans-Christian Reimers (LLUR S-H) 5

Other Sediment Types Organic Sediment Types • Gyttia • Shell Debris Genetic Sediment Types • Lag Sediment (incl. Boulders) • Till Dr. Manfred Zeiler (BSH) & Dr. Hans-Christian Reimers (LLUR S-H) 6

Side Scan Sonar: Data Collection (EEZ) Lines: Tracks of Different Side Scan Sonar Surveys Green: Natura 2000 sites in the German EEZ Dr. Manfred Zeiler (BSH) & Dr. Hans-Christian Reimers (LLUR S-H) 7

Side Scan Sonar: Data Collection (Territorial Waters) 8

Conclusion and Outlook That's clear! • Hydroacoustic and remote sensing techniques are very practical for the habitat and seabed monitoring in context of MSFD, HD and WFD • They provide high resolution spatial information • Hydroacoustic and remote sensing techniques, only in combination with expert supervised ground truthing lead to reliable results What do we need? • Better knowledge about the ecosystem function of different habitats • Improvement of hydroacoustic and remote sensing techniques for the detection of biogenic structures like mussel beds, sea grass or macro algae • There is still a special need for the intercalibration of monitoring practices an assessment methods (national and regional) 9

Adding Biology …. (Alexander Darr, Kerstin Schiele, Kolja Beisiegel) … 2 level of accuracy: 1. Modelled distribution of HUB-level 6 biotopes - applicable for predominant Soft-substrate biotopes - update in 2018 Schiele et al. (2015) 10

2. High resolution maps of heterogeneous areas - Especially for reef areas - Combining backscatter-data with punctual biological data (grab samples, Scuba diving, fotoframes, video transects…) - Method(s) under development - 1 st results expected beginning 11 of next year