Jesew user guide

Quick user guide for Jesew, a computer program for 'Joint Ecological and Socio-economic Evaluation of Water resources development. The program is originally written in Basic (Torno, 1988), but for TU Delft and Unesco-IHE Delft rewritten as a spreadsheet application.Hydraulic EngineeringCivil Engineering and Geoscience

Predicting long-term and short-term tidal flat morphodynamics using a dynamic equilibrium theory

Dynamic equilibrium theory is a fruitful concept, which we use to systematically explain the tidal flat morphodynamic response to tidal currents, wind waves, sediment supply, and other sedimentological drivers. This theory stems from a simple analytical model that derives the tide- or wave-dominated tidal flat morphology by assuming that morphological equilibrium is associated with uniform bed shear stress distribution. Many studies based on observation and process-based modeling tend to agree with this analytical model. However, a uniform bed shear stress rarely exists on actual or modeled tidal flats, and the analytical model cannot handle the spatially and temporally varying bed shear stress. In the present study, we develop a model based on the dynamic equilibrium theory and its core assumption. Different from the static analytical model, our model explicitly accounts for the spatiotemporal bed shear stress variations for tidal flat dynamic prediction. To test our model and the embedded theory, we apply the model for both long-term and short-term morphological predictions. The long-term modeling is evaluated qualitatively against previous process-based modeling. The short-term modeling is evaluated quantitatively against high-resolution bed-level monitoring data obtained from a tidal flat in Netherlands. The model results show good performances in both qualitative and quantitative tests, indicating the validity of the dynamic equilibrium theory. Thus, this model provides a valuable tool to enhance our understanding of the tidal flat morphodynamics and to apply the dynamic equilibrium theory for realistic morphological predictions.Hydraulic EngineeringCivil Engineering and Geoscience

Drag coefficient of vegetation in flow modeling

Poster. The interaction between aquatic plants and hydrodynamic force and its implication on the long-term landscape development have received intention from ecology, geology and hydraulic engineering.Hydraulic EngineeringCivil Engineering and Geoscience

Inleiding waterbouwkunde

In het college CT2320- lnleiding Waterbouwkunde- wordt een breed overzicht gegeven van de verschillende aspecten van het vak Waterbouwkunde. Dit houdt in dat informatie wordt gegeven over ontwerp en uitvoering van allertei soorten waterbouwkundige werken. Door de breedte van het onderwerp zal de diepgang in dit inleidende college beperkt moeten blijven. De nadruk zal worden gelegd op begrip, terwijl voor het kwantificeren veel gebruik zal worden gemaakt van vuistregels.Hydraulic EngineeringCivil Engineering and Geoscience