Bridging the dike: an architectural intervention to unlock environmental engineering as a common ground

The Dutch sea water level raised with 24cm over the last 128 years. From a linear increase, we can see an increasing trend since the 1990s. According to recent scientific research, the sea level in the Netherlands will rise 1 to 2 meters by 2100 with a maximum global warming of 2 degrees Celsius. With a temperature rise of 4 degrees, the North...

De waterbeweging in het Sieperdaschor

Het Sieperdaschor is ontstaan uit de voormalige Selenapolder, nadat in februari '90 tijdens een zware storm de zomerkade is doorgebroken. Reparatie bleek te kostbaar en daarom is in overleg met Zeeuws Landschap besloten om de dijk niet te herstellen. Dit bood een goede gelegenheid om de ontwikkeling van polder tot schor te onderzoeken. Dit mede...

Ancient salination: A generator for a sustainable development of the salt villages in Danzhou

Like many traditional water systems, salt fields in the coastal region of Danzhou are now facing unprecedented challenges from social development and climate change. In an era of rapid urbanization and tourism development, the project aims to provide a landscape approach that balances historical preservation with the development of local public...

Cross-shore morphodynamics of intertidal bars: A conceptual model, empirical evidence and numerical modelling

The beach recovery process determines the resilience of a sandy coast and is an important aspect of the coastal safety. Sediment stored underwater due to storms is transported onshore by the migration of subtidal and intertidal bars under mild wave conditions. The intertidal zone is an im-portant interface, connecting the marine and aeolian zone...

Morfologische ontwikkeling van de Westerschelde sinds 1650

In het kader van een afstudeerproject is een studie verricht naar de morfologische ontwikkeling van de Westerschelde sinds 1650 volgens eendimensionale rekenmodellen. De validatie van dit soort modellen is namelijk een probleem. Van de Westerschelde bestaat weliswaar een groot aantal meerdimensionale modellen, maar door de grote hoeveelheid aan...

Stability of intertidal and subtidal areas after Delta21 plan: Evaluating the consequences for the morphological development produced by the interventaion

In recent years, there has been an increasing need for solutions against the threats that SLR and climate change represent for coastal systems, especially in low lying areas like the SW Dutch coast. Simultaneously, awareness of the impacts that human activities have on natural environments has surged. Integrated and sustainable solutions are...

Wave attenuation over the Oesterdam tidal flat nourishment: Wind-wave transformation in the intertidal zone

The Oesterdam tidal flat nourishment is a hook-shaped nourishment that was constructed in November 2013 in the Kom area of the Eastern Scheldt. One of the objectives of the nourishment is to increase the design life of the Oesterdam in the face of increasing wave loads due to structural erosion of the intertidal flats. A study is conducted in...

Morphodynamic modelling of the Galgeplaat

Since the completion of the Eastern Scheldt project in 1987, in the south-western part of The Netherlands, there has been a decrease of tidal volume, range and current in the Eastern Scheldt estuary. This has led to morphologic changes in the basin. The channels are in demand of sediment and as the Eastern Scheldt barrier itself blocks most of...

Modelling of the cross-shore grain size distribution in the intertidal zone

The Building with Nature approach has been gaining ground in hydraulic engineering, increasing the importance of understanding the cross-shore morphodynamic processes. The intertidal zone, where marine and aeolian processes come together, is an important link in the transport of sediment from the sea towards the dunes. The grain size...

Assessing alongshore variability of intertidal channels at Noordwijk by means of LiDAR measurements

In order to understand the long term behavior of intertidal ridge-runnel systems high resolution spatial and temporal data covering extended periods of time is needed. Such datasets are still rare but are becoming more available through the usage of remote sensing technologies such as Argus and Terrestrial Laser Scanning. A three month period ...

Foreshore Morphodynamics from Shore-based Marine Radar: On a Stretch of Sylt Beach

Bathymetry strongly affects nearshore hydrodynamics that drive sediment transport. However, recent bed level information is not always available, especially not simultaneously resolved in space and time. Time series of radar backscatter images can be used to retrieve bed levels in the intertidal area with the so-called Temporal Waterline...

Investigating Wind-Waves Impact and Sea Level Rise on the Long-term Morphological Development of Estuarine Shoals

Estuarine shoals are valuable areas with functions of nature, safety and navigation. It is of utmost importance to understand their underlying physical processes and long-term evolution to achieve protection. The first aim of this report is to determine the impact of wind-waves on long-term morphological development of estuarine shoals. The...

Deriving Beach Grain Size from Satellite Imagery: A multimethod approach for deriving intertidal beach slopes and sediment grain sizes for different coastal environments

The world's coasts are at risk: an estimated 24% of the world's beaches are eroding. Extreme events such as storms continuously threaten the coastal region and pose a serious risk of coastal flooding. Under the influence of climate change, the seaward pressures are only expected to increase. Sea level rise is accelerating, storm intensities and...

Modeling Long-term Morphological Developments of Intertidal Flats: A Comparison Among Different Modeling Approaches

Estuarine intertidal flats comprise valuable ecosystems and act as an important sediment source for the adjacent salt marsh systems. However, accelerating sea-level rise threatens the mudflats and associated ecosystems, where the mudflat accretion lag behind sea level rise. A reliable forecast on the morphological developments of the mudflat...

Tidally- and Wind-Driven Horizontal Flow Patterns on Intertidal Flats in the Wadden Sea: An Assessment using Subgrid Modeling Technique

The Wadden Sea is of great ecological importance. Key elements in the Wadden Sea are the extensive intertidal flats. These contain vast amounts of life, serve as feeding grounds for millions of birds, and provide ecosystem services such as coastal protection. It follows that it is important to be able to understand and predict how these vital...

Spatiotemporal aeolian sediment transport variabilities at Oysterville (WA) beach

Changes in spatiotemporal variability of aeolian sediment transport as result of bar welding are studied in this paper, within the scope of SEDEX².