Beyond sand and water: Opportunities for the continuous social, structural and morphological transformation of Puntarenas

The city of Puntarenas in Costa Rica is one of the many examples along the country’s pacific coast, where settlements have developed and survived by the extraction/exploitation of marine resources and the chain of industries that follow. Currently, these coastal communities are being affected by an amount of socio-economical issues, some...

Using small scale morphological features on estuarine tidal flats as indicators for large scale morphological shape and development

Intertidal flats and salt marshes can protect hinterland against wave energy and flooding by tides or storm surges. Thus, the development of tidal flats is important to foresee. The presence of specific small scale features could indicate a certain development and large scale morphological shape. The shape is a predictor for development and it...

Development and Extension of An Aggregated Scale Model: Part 1 – Background to ASMITA

Whilst much attention has been given to models that describe wave, tide and sediment transport processes in sufficient detail to determine the local changes in bed level over a relatively detailed representation of the bathymetry, far less attention has been given to models that consider the problem at a much larger scale (e.g. that of...

Stability of morphological cells to dredging-dumping activities

The Westerschelde estuary in the South-West of the Netherlands displays two meandering flood and ebb channels separated by shoals. The system of flood, ebb channel and shoal between two channel crossings form a morphological cell. The stability of the serial cell system formed by the Westerschelde is important for the navigation route to the...

Long-term morphological modeling for Feiyun estuary with ESTMORF

The Feiyun River, with a length of 203 km and a catchment area of 3252 km2, is one of eight rivers in Zheijiang Province (see fig.1-1), China. It flows into the East China Sea in Shangwang of Ruian City. The source of Feiyun River is at Xialing located in the border between Zheijiang and Fujian Province. The tidal influence can reach up the...

Morphodynamics of estuarine navigation channel

The port of Kandla, which is situated in the north west of India and is subject to a large tidal variation of about 5 metres, is preparing a major expansion plan. The capacity of the harbour will be increased in two ways. Firstly the construction of several berths and jetties will allow more ships to be handled on a yearly basis. Secondly...

A new morphological schematization of the Western Scheldt estuary, The Netherlands

The present paper describes an analysis of the morphological integrityof the multiple channel system (MCS) of the Western Scheldt estuary. The tidal flats and surrounding ebb and flood channels form morphological cells, and the entire MCS can be schematized as a chain of such cells. The major ebb and flood channels have lost their one time...

Haringvlietmonding: Op zoek naar evenwicht: Morfologische ontwikkelingen van de Haringvlietmonding sinds 1970

Het Haringvliet is een zeegat dat deel uitmaakt van het Deltagebied. Vanaf 1950 zijn er een aantal grote ingrepen gedaan in de monding van het Haringvliet, zoals de aanleg van de Maasvlakte en de Slufterdam en de bouw van de Haringvlietdam met spuisluizen. Door deze ingrepen is de hydrodynamische situatie en daarmee de morfologie ingrijpend...

Two dimensional sedimentation modeling in the Port of El Tablazo

Due to increasing dredging costs, especially in ports and estuaries where the bed often contains contaminated substances, an increased tendency is observed to the investigation for more structural solutions to prevent deposition. Before however applying such engineering schemes a thorough knowledge of the sediment dynamics is needed. In the...

Interaction between the Yellow river and its estuary

The 5,464 km long Yellow River (Chinese: Huang He) is the second longest river of the Peoples Republic of China. Its source is in Qinghai-Tibet Plateau and empties after serving an agricultural population of over 126 million people in the Bohai Bay. The main characteristic of the Yellow River is the extremely high sediment load which causes the...

Morphological modelling of ebb and flood channel systems in estuaries

The morphological behaviour of estuaries is complex and at present (1995) not well understood. Ebb and flood channels play an important role in the morphological behaviour of an estuary. In order to get more insight in the morphological behaviour of such systems it is studied whether a 1-D morphodynamic network model gives insight in this...

Aspects of sediment- and morphodynamics of subtidal deposits of the Oosterschelde (Netherlands)

The present thesis consists of five articles, in all of which links are established between sedimentological aspects of sediments - mostly below the low-water 'line - in the Oosterschelde and either large- or small-scale morphological changes. Large morphological changes and associated movements of sediment which occur in the tidal system of the...

Morphology of the mouth of the river Douro (Portugal)

The river Douro debouches into the Atlantic Ocean near Oporto (Portugal) with a funnel-shaped mouth, partly closed from the ocean with a sand spit. Both the wave-induced longshore sediment transport as the sediment yield of the river are limited by the available quantity of sediment (non-alluvial conditions). The results of some sediment...

Hydromorphological study Tagus Estuary, wave penetration model and estuarine flow model

Integrated study on the hydro-morphology of the Tagus outer estuary and the Tagus Inner estuary. Wave penetration calculations, tidal flow calculations and calibration measurements.

Terminal do Seixal: Hydro-morphological study

The calculations of bottom changes presented in our report "Terminal do Seixal Hydro-morphological study", February 1982 were based on a calibrated sediment transport formula. This formula was calibrated with the results of measurements made by Hydronamic in September 1981. These measurements were executed during one of the driest summers...

Terminal do Seixal, hydro-morphological study

Hydronamic has performed a study for the design of the new access channel to the terminal of Siderurgia Nacional at Seixal (near Lisbon) in the Tagus estuary. The report deals with the following subjects: - In chapter 2 a description is given of the mathematical tidal model, the calibration thereof and the final results. - Chapter 3 deals with...