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Coastal Engineering information (1)

Paper 5: Application of remote sensing video systems for coastal stability problems on natural beaches. Coastal Engineering information (1). Title: Application of remote sensing video systems to coastal stability problems on natural beaches

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Coastal Engineering information (1)

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  1. Paper 5: Application of remote sensing video systems for coastal stability problems on natural beaches

  2. Coastal Engineering information (1) • Title: Application of remote sensing video systems to coastal stability problems on natural beaches • Authors: Aart Kroon, Troels Aagaard, Stefan Aarninkhof, Paolo Ciavola, Mauricio González, Rob Holman, Ruud Spanhoff • Pages: 20

  3. Coastal Engineering information (2) Objectives: • Different time-scales involved in coastal stability problems. Traditional measurements only cover a couple of scales. Relevant video-derived variables (coastal state indicators) will bridge the scales. Long time-series of (aggregated) CSIs are applied to solve the coastal stability problem. • Assessment of seasonal and yearly temporal variability (trend signals and noise). • Threshold values beyond which intervention will be required.

  4. Coastal Engineering information (3) Indicative contents: Coastal stability: coastal safety, recreation & navigation Temporal and spatial variability in CSIs related to: • Waterlines Shoreline positions, shoreline exceedence curves, beach width, beach volumes • Features Rip channel locations, bar locations, dune positions • (Hydrodynamics Alongshore currents : not enough data)

  5. Examples Sites: only examples of the Dutch coast (not in the final paper) Waterlines Shoreline positions, shoreline exceedence curves, beach width, beach volumes: Italy, Netherlands, Spain Features Rip channel locations, bar locations, dune positions: Italy, Netherlands, Spain

  6. Coastview: Recreation Beach width Dune foot & water lines Noordwijk beach Stefan Aarninkhof Aart Kroon Kathelijne Wijnberg

  7. Coastview: Recreation Non-permanent beach restaurants Noordwijk beach Aart Kroon

  8. Egmond Jan van Speijk (July 7, 2000) Coastview: shorelines and nourishment Egmond Jan van Speijk (June 29, 2000) Nourishment July 2000 Kathelijne Wijnberg, Stefan Aarninkhof Egmond beach

  9. Coastview: Shorelines and nourishment data M. Caljouw , L. Nipius data C. Reintjes Kathelijne Wijnberg, Stefan Aarninkhof Egmond beach

  10. Coastview: Shorelines and nourishment Mean : 57 m 57 m 0 m St.dev. : 29 m 16 m 25 m Variance : 838 m2 211 m2 (25%) 627 m2 (75%) Kathelijne Wijnberg, Stefan Aarninkhof Egmond beach

  11. Coastview: Coastal Safety Coastal Safety Beach volumes traditional surveys ARGUS & IBM MCL & MICL (m) Time (months) Stefan Aarninkhof Egmond beach

  12. Coastview: Recreation Recreation or Navigation Rip location and spacing ARGUS April 1998-1999 Aart Kroon Egmond beach

  13. Contents (1) Abstract Introduction (see previous slides) aim (CSIs for coastal stability problems) questions addressed ARGUS-related CSIs time-series contents of the sections

  14. Contents (2) Methods no explanation of the standard video techniques: oblique – plan determination of water lines, bar lines, rip locations definitions and computation of beach widths, -volumes, and –volumetric derivatives (MCL, etc.) statistics of the exceedence curves simple time-series techniques (correlation techniqes, C-EOF)

  15. Contents (3) Results (1) Time-series of water lines (shore lines, beach width [E, I, NL], beach volumes [NL]) determination of variables and field verification quantification of trends and other variabilities quantification of threshold values and gradual/sudden changes presentation of forcing conditions (water levels, waves)

  16. Contents (4) Results (2)Time-series of features (bar positions, rip positions [I,NL]) determination of variables and field verification quantification of trends and other variabilities quantification of threshold values and gradual/sudden changes presentation of forcing conditions (water levels, waves)

  17. Contents (5) Discussion (1) Coupling between forcing and time-series of water lines, shore lines, beach width, beach volumes direct forcing and self organization (2)Determination of the temporal and spatial variability in relation to the management questions addressed does it solve any problem? (3)Persistency and robustness of the CSIs Conclusions

  18. This workshop Agreement over the contents. Who is doing what? (tasks with time schedule) Paper-group and individual discussions: what are the CSIs (time-series) you’d like to contribute? what is the method you used to compute the CSIs (there are some standards now, how do they relate to each other)? what is the proposed benefit of your exercise to the CZManager?

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