Bowthruster-induced damage

The stability of stones in propeller-induced jet wash is still difficult to predict. Especially the trend of bowthrusters increasing in size and power in sea going ships (especially ferries) over the last years may be a reason for concern when dealing with the protection of slopes and beds. But also ships used in inland navigation are using...

Results of the MarCom questionnaire

On request of MarCom a questionnaire has been prepared to investigate the opinion of PIANC members and others about the quality and the usefulness of the MarCom working group reports. The results of this questionnaire were presented and discussed at the Sydney Conference (September 2002).

Criteria for the selection of breakwater types

In history PIANC has paid quite some attentions to breakwaters, in ancient years results of practical experience have been published in the country presentations at the Conferences, but later some of these papers started to have a more scientific basis. One of the first papers giving a good background on the processes of stability of breakwaters...

Experimental study of wave forces on rubble mound breakwater crown walls

This paper has two main objectives: (1) to describe the experimental work carried out in order to verify the theoretical method from Martin (1995) for the calculation of wave forces on crown walls and (2) to show some results from field and lab measurements and compare these data to calculations from several analytical methods. The Principe de...

Ten years of experience in combining ecology and navigation on Dutch waterways

In this paper we will discuss the experience gained in the Netherlands with the multifunctional management of waterways. We will especially go into how the functions of rivers and canals for navigation and nature are combined. For this we will briefly go back to the national paper for Seville 1994, "Waterways with room for nature", in which the...

Comparison construction costs conventional rubblemound breakwaters/bermbreakwater

Given a harbour location and a wave-climate, two different types of rubble-mound breakwaters were designed. Using realistic quarry yield curves and prices for production, transport and constmction, the total costs of the conventional statically stable and dynamically stable bermbreakwater designs were compared to each other. This comparison led...

Dutch approach to coastline management

In the Netherlands we have a strong tradition in making zoning regulations, town and country planning, and so on The Ministry of Environmental Affairs, Town and Country Planning and Housing is one of the most important ministries in this country In matters of planning the basis is the "memorandum on town and country planning", which is renewed...

Flexible armoured revetmentss incorporating geotextiles

1. Flexible revetments-theory and practice. C. T. BROWN 2. Loads on beds and banks caused by ship propulsion systems. H. U. OEBIUS 3. Proposals of flexible to~. design of revetments. G. HEERTEN and W. MUHRING 4. Design of bank protection of inland navigation fairways. H. G. BlAAUW, M. T. de GROOT, F. C. M. van der KNMP and K. W. PIIARCZYK 5....

The relation between the form of cross section the cross section, the method of revetment and the distribution of the water velocities in a waterway

Calculation method for water movement induced by ships in canals

Classification des digues

Development of a formula for the stability of rubble mound breakwaters.

The penetration of sea water into the Dutch river mouths and estuaries

contains an overview of the state of art of salt penetration knowledge in 1953, presented at the PIANC conference. This Dutch contribution contains three parts: The penetration of sea water into the Dutch river mouths and estuaries( van Veen), Theories on which a method of calculation for the movement of salt water and fresh water in a river is...

Protection of embankments and bed in inland and maritime waters, and in overflows or weirs

L'etude du probieme de la protection des rives de cours d'eau, taite dans ce rapport, sera limitee au cas d 'un bateau naviguant dans un canal relativement ·etroit. Le risque que Ie fond et les talus du canal soient degrades, est determine par Je caract ere et l'intensite des mouvements qui naissent de la navigation et qui, a leur tour,...

Protection des ports

Overview of port diffraction and refraction, wave penetration in ports.

Onderzoek betreffende den invloed van golfbewegingen en langsstroomingen in kanaalpanden, welke aansluiten aan sluizen met groot verval, in het bijzonder tengevolge van de vlugge vulling en lediging van deze kunstwerken

Metingen uitgevoerd in de Twenthekanalen en op het Amsterdam-Rijnkanaal naar translatiegolven veroorzaakt door het openen en sluiten van sluizen in deze kanalan. Theoretische achtergrond en toetsing van deze methode aan meetgegevens. Opm.: alleen in dit jaar zijn de papers ook allemaal in het Nederlands verschenen. Het originele paper is in het...

Recent examples of foundations of works sneb as quay-walls and lock-walls resting on poor subsoil; effect of the ground water and of its fluctuations in level. Studies. - Results obtained

The notion of "poor subsoil" or " bad building ground " is relative. One is usually inclined to only reckon clay or peaty ground as coming within this category, hut other kinds of soil, such as fine sand, may also be qualified as unsuitable for supporting certain structures. For light buildings, such as houses, even clay or peaty soil often...

Illustrated Technical Dictionary in six languages

Illustrated systematic dictionary of terms relation to the navigational infrastructure: I The Sea (A. de Rouville, 1958), II Rivers, streams and canals (L.R. Wentholt, 1939), III Bridges (only illustrations, text is lost), IV Boats and Ships, Propulsion (F. Beau and P. Cot, 1966), V Materials (H.A. Reed and N.G. Gedye, 1951), VI Construction...