Dynamic drag modeling of submerged aquatic vegetation canopy flows

Vegetation has a profound effect on flow and sediment transport processes in natural rivers, by increasing both skin friction and form drag. The increase in drag introduces a drag discontinuity between the in-canopy flow and the flow above, which leads to the development of an inflection point in the velocity profile, resembling a free shear layer. Therefore, drag acts as the primary driver for the entire canopy system. Most current numerical hydraulic models which incorporate vegetation rely either on simple, static plant forms, or canopy-scaled drag terms. However, it is suggested that these are insufficient as vegetation canopies represent complex, dynamic, porous blockages within the flow, which are subject to spatially and temporally dynamic drag forces. Here we present a dynamic drag methodology within a CFD framework. Preliminary results for a benchmark cylinder case highlight the accuracy of the method, and suggest its applicability to more complex cases.

The history of Lapland : containing a geographical description, and a natural history of that country; with an account of the inhabitants, their original, religion, customs, habits, marriages, conjurations, employments, &c. Written by John Scheffer, ... Translated from the last edition in Latin, and illustrated with many curious copper-cutts. To which are added, the travels of the King of Sweden's mathematicians into Lapland: the history of Livonia, and the wars there: also a journey into Lapland, Finland, &c. Written by Dr. Olof Rudbeck in the year 1701

Added engraved title page: The history of Lapland.

Scandinavia and its confines, in which are the Kingdoms of Sweden, Denmark, and Norway, divided into their principall provinces viz. Under the crown of Sweden, those of Gothland, Sweden, Lapland, Finland, Ingria, and Livonia; Under the crown of Denmark, those of Jutland, Sleswick, Zealand, Fyonie, &c. In Denmark those of Agger, Dronthem, and Wardhous, in Norway /

1 kartta :, käsinvär. ;, 56,4 x 86,7 cm, lehti 62,5 x 91,5 cm

The northern provinces of Sweden and Norway with part I of Russia

Kartta kuuluu A. E. Nordenskiöldin kokoelmaan

The northern provinces of Sweden and Norway with part I, of Russia / published under the superintendence of the Society for the Diffusion of Useful Knowledge.

[N. 1:4400000].

A new & accurate map of Sweden: collected from the latest improvemts. and adjusted by the most authentic astronl. observations

Teoksessa: A Complete System of Geography /E. Bowen, 1747. Plate 27.

A new map of Sweden and Norway

London, published by James Wyld, Geographer to the Queen & H.R.H. Prince Albert, Charing Cross East & Model of the Earth, Leicester Square.

A new and exact map of Sweden and Norway corrected from the best observations communicated to the Royal Society at London & the Royal Academy at Paris &c.

Kartta leikattu karttakuvaa reunastavan kehyksen ulkorajaa pitkin.

A new and accurate map of Scandinavia, or the northern crowns of Sweden, Denmark, and Norway: drawn from the most approv'd maps and charts, and adjusted by astronoml. observations

Teoksessa A complete system of geography / E. Bowen, (London) 1747. Plate n:o 25.

An accurate map of Sweden, Denmark, and Norway, from the best authorities by Thos. Bowen

Engraved for Middleton's complete system of geography.