Utilising the full potential of dredging works: ecologically enriched extraction sites

Marine extraction sites alter the morphologyof the seabed and in doing so offer uniqueopportunities to create a new environment inthese locations. A new physical lay-out meansdeeper waters and different currents andsediment characteristics, which offerconditions to develop a new ecosystem ora sanctuary for certain fish species. Thispotential has been tested in a full-scale pilotproject in an extraction site in the North Seawithin the Building with Nature researchprogramme

Sustainable development of land reclamations and shorelines full scale experiments as a driver for public - private innovations

With 80% of the world's population living in lowland urban areas by 2050, sea levels gradually rising and societal demands on the quality of living increasing, sustainable development of coastal zones becomes increasingly urgent as well as complex. Modern strategies for the design and implementation of measures for infrastructure development, coastal protection and other functions adopt the concept of Building with Nature to handle these challenges. Recently, two full scale experiments were implemented to assess the benefits of the this approach for coastal development. The Sand Motor pilot project addresses the potential concentrated nourishments on the basis of a 21 million m3 shore nourishment at the Delfland coast in the Netherlands. This unprecedented experiment aims to protect the hinterland from flooding by letting natural processes distribute sand over shoreface, beach and dunes, thus constituting a climate-robust and environmentally friendly way of coastal protection. The second experiment addresses the concept of seabed landscaping in sand extraction sites, which aims to add ecological value to the sand borrow areas after construction. Both pilots have been monitored since their completion in 2010/2011 and will be monitored extensively in the coming years

Nearshore Bathymetry derived from Video Imagery

Owing to the economic importance of seasonal fluctuations in beach width and the frequent implementation of local beach and shoreface nourishments, coastal managers and scientists increasingly demand coastal state information at smaller spatiotemporal scales. Advanced, automated video techniques provide the means to collect such high-resolution monitoring data. Successful use of video imagery for coastal monitoring requires the quantification of relevant morphological parameters from remotely sensed information. This thesis presents two complementary methods to quantify intertidal and subtidal beach bathymetry from time-averaged video observations. Application of the new methods to a nourished beach at Egmond (The Netherlands) has confirmed their utility in support of coastal management, revealing unexpected morphodynamic behaviour that would have been hard to measure with traditional survey techniques. Stefan Aarninkhof conducted his PhD. research at the Department of Civil Engineering and Geosciences of Delft University of Technology, in close collaboration with Delft Hydraulics.Civil Engineering and Geoscience

Over de grens van water en land

Intreerede, uitgesproken bij de aanvaarding van het ambt van hoogleraarKustwaterbouwkunde aan de Technische Universiteit Delft.IntreeredeCoastal Engineerin