Knowledge management in an integrated design and engineering environment

Organisations and / or disciplines in Building and Construction projects are usually working in their own design and engineering environments and using their own Building Information Models (BIM). The discipline models are merged into a project BIM which is mainly used to check for interferences or other flaw geometrical interface conditions....

Performance and process analysis of duckweed-covered sewage lagoons for high strength sewage: The case of Sana'a, Yemen

Abstract not available

Competition for scarce groundwater in the Sana'a Plain, Yemen: A study on the incentive systems for urban and agricultural water use

Abstract not available

Dewatering sewage sludge with geotextile tubes

Municipal sewage was placed in geotextile bags for the purpose of evaluating the dewatering and consolidation capabilities of large geotextile tubes and effluent water quality. A proposed AS TM test method for determining the flow rate of suspended solids from a geotextile containment system for dredged material was used to conduct tests to...

On the application of data assimilation in regional coastal models

Grass covers and reinforcement measures

Design information for grass on dikes and revetments.

Emergence, evolution, intelligence: Hydroinformatics

The computer-controlled operating environments of such facilities as automated factories, nuclear power plants, telecommunication centres and space stations are continually becoming more complex.The situation is similar, if not even more apparent and urgent, in the case of water. Water is not only mankind's most valuable natural resource, but...

General strategy on coastline protection: The Dutch case

Overview of the Netherlands policy on coastal protection and coastal defence

Effects of sea level rise on coastal evolution

Using the Dutch coastal evolution in the Holocene upto the present as an example and a test case, a coastal evolution concept is proposed and materialized with which shoreline position changes for different sea level rise scenarios are predicted. The (more generally applicable) model applies to (quasi-)uniform coastal stretches. It accounts for...

Shock pressure interactions on prototype sea dykes caused by breaking waves

This paper deals with shock pressure phenomena due to breaking waves acting on sloping faces of sea dykes and other dike revetments. The full-scale investigations were carried out in the new research facility LARGE WAVE CHANNEL in Hannover. Germany. Maximum shock pressure estimations are given for practical slopes 1:4 and 1:6. An extension of...

The interaction between soil, water and bed or slope protection

The interaction between soil, water and structure is discussed for a bed and slope protection. It is shown that for various types of structures, and various boundary conditions, this interaction can be approached in a uniform way . The hydraulic conditions at the boundaries of the structure and along the non-protected parts of the bed result in...

Analytical approach to some practical aspects of local scour around bridge piers

Local scour is one of the most important causes on bridge failures during floods, and recent changes of river environments makes it difficult to predict the scour depth and design an appropriate protection works. In this study, firstly an analytical model to describe scouring process around a pier has been derived based on reasonable...

Alternative revetments

Summary of design methods for alternative revetments, such as interlock systems and block mats, gabions, concrete mattresses and geosystems, such as sandbags and sand sausages. This contribution aims at giving a summary of the increased knowledge, especially that concerning the design tools that have been made available.

The permeability of closely placed blocks on gravel

The permeability of a layer of closely placed concrete blocks on a sublayer of gravel or sand without a geotextile has been investigated. The results indicate that the permeability of the blocks can be described as a combination of the permeability of the joints and the permeability of the the gravel just below the blocks. The permeability of...

Erosion of sediment through cellular revetment blocks applied as slope protection along coasts and inland waterways

Erosion of banks and dikes subjected to water motion can be prevented, for instance by application of cellular concrete revetment blocks. This type of revetment combined the merits of a closed block revetment and a slope revetment consisting of loose materials. Advantages are high permeability, high stability against wave attack and low block...

Impact of sea level rise on society

Report of a project planning session in Delft (29-29/8/1986) and contains: Framework of analysis and recommendations; policy analysis; an outline of the contributions to the workshop; the lower countries and a higher Atlantic; The cause and effects of sea level rise; sea level rise on the awakening Earth; the data acquisition of trends observed...