Towards water quality models

1993 ◽  
Vol 343 (1669) ◽  
pp. 569-584 ◽  
Keyword(s):  
Water Quality ◽  
Three Dimensional ◽  
Metal Interactions ◽  
The North ◽  
The North Sea ◽  
Transport And Diffusion ◽  
Three Dimensional Models ◽  
Component Models ◽  
Water Quality Models ◽  
And Diffusion

Predictions of water quality involve the modelling both of physical processes, which underlie the transport and diffusion of all constituents, and of the sources, sinks, partitioning and interactive processes individual to those constituents. These processes are outlined, together with complementary modelling approaches: (i) development of sophisticated three-dimensional models to represent the physics, and sub-models of suspended sediment, microbiology and metal interactions for processes controlling nutrients, dissolved oxygen, phytoplankton, detritus and metals; (ii) a framework to link these component models; (iii) an accessible model with simpler physics for wide use in simulating constituent distributions, for comparison with measurements to infer sources, sinks and interactions. The North Sea Project measurements provide an input in process evaluation, and data to test the models.

Comparison of the performance of five different water quality models of the North Sea

1998 ◽  
Vol 13 (5-6) ◽  
pp. 455-460 ◽  
Author(s):  
S. Stolwijk ◽  
M.T. Villars ◽  
R. Laane ◽  
A. Baart ◽  
S. Dick ◽  
...  
Keyword(s):  
Water Quality ◽  
North Sea ◽  
Quality Models ◽  
The North ◽  
The North Sea ◽  
Water Quality Models

Two- and Three-Dimensional Models of Dispersion Based upon Measurements in the North Sea

1991 ◽  
Vol 24 (10) ◽  
pp. 45-53 ◽  
Author(s):  
G. C. van Dam
Keyword(s):  
North Sea ◽  
Three Dimensional ◽  
Historical Review ◽  
Particle Simulation ◽  
Simulation Methods ◽  
The North ◽  
Recent Developments ◽  
Long Time ◽  
The North Sea ◽  
Three Dimensional Models

After a brief historical review some recent developments are discussed, with an emphasis on particle simulation methods. Examples are shown of relatively short and relatively long time scale applications in connection with accidental spills and problems of continuous sources respectively.

scholarly journals Morpholithodynamics of lagoonal straits of the North-Eastern Sakhalin

2019 ◽  
pp. 79-94
Author(s):  
V. V. Afanasev
Keyword(s):  
Additional Data ◽  
Three Dimensional ◽  
Remote Sensing Data ◽  
Water Area ◽  
The North ◽  
North Eastern ◽  
Geological Information ◽  
History Of ◽  
Three Dimensional Models ◽  
And Migration

The results of the analysis of geospatial and geological information on the structure and dynamics of the lagoon coast of the North-Eastern Sakhalin are presented. On the basis of a number of parameters of the coastal erosion-accumulation processes and migration of lagoon straits during the period 1927–2014. the morpholithodynamics system of the North-Eastern Sakhalin was considered. The volume of sediments transported during the migration of the straits, was estimated with the help of three-dimensional models, in which, parallel with time-averaged areas of erosion and accumulation, additional data were used, namely: bathymetry of the straits and adjacent water area, characteristics of the relief of the barrier forms and geological information obtained as a result of georadar survey and drilling. Georadar data, together with remote sensing data, have made it possible to create a model of sedimentation, which formed the basis for the analysis of the history of the coast formation beyond the period of observations. Currently, we can trace the situation as long as to the middle of the XIXth century.

Accuracy of Water Quality Predictions with Loading Scenarios of Forest Industry Waste Waters

1999 ◽  
Vol 40 (11-12) ◽  
pp. 147-154
Author(s):  
Timo Huttula ◽  
Anu Peltonen ◽  
Tom Frisk ◽  
Hannu Wirola ◽  
Kirsti Krogerus
Keyword(s):  
Water Quality ◽  
Three Dimensional ◽  
Water Quality Monitoring ◽  
Pulp Mills ◽  
Quality Models ◽  
Environmental Evaluation ◽  
Industry Waste ◽  
Paper And Pulp ◽  
Lake Waters ◽  
Water Quality Models

The environmental effects of the Finnish industrial loadings are in practice decided by water courts as they give permits. In decision-making they use an inspection procedure. Since 1970s in Finland within this procedure one method of environmental evaluation has been the application of numerical water quality models. At the Kokemäenjoki watercourse water quality effects of the paper and pulp mills in Mänttä, Lielahti and Valkeakoski were studied with two or three dimensional water quality models. On the basis of these results the costs and benefits of different loading options were considered. Now, after more than a decade, the response of the lake waters to the nutrient and BOD loading can be seen in the water quality monitoring results. We used these observations and studied the accuracy and limitations of these early water quality models.

The water quality of UK rivers entering the North Sea

2000 ◽  
Vol 251-252 ◽  
pp. 5-8 ◽  
Author(s):  
C Neal ◽  
W.A House ◽  
G.J.L Leeks ◽  
B.A Whitton ◽  
R.J Williams
Keyword(s):  
Water Quality ◽  
North Sea ◽  
The North ◽  
The North Sea

Studies on a Calanus Patch III. The quantity of food eaten by Calanus finmarchicus

1963 ◽  
Vol 43 (2) ◽  
pp. 349-371 ◽  
Author(s):  
D. H. Cushing ◽  
T. Vucetic
Keyword(s):  
Water Temperature ◽  
North Sea ◽  
Calanus Finmarchicus ◽  
Algal Production ◽  
The North ◽  
The North Sea ◽  
Grazing Mortality ◽  
And Diffusion ◽  
Grazing Capacity ◽  
Food Consumed

The purpose of this paper is to assess the grazing capacity of Calanus finmar-chicus (Gunner.) in terms of the quantity of food eaten in the sea. The part played in the growth of the animal by the quantity eaten will only be briefly discussed. The parts played by nutrient lack, sinking and diffusion on the algal productive rates will also be discussed, leading to the conclusion that grazing mortality is the most effective controlling agent on algal production.A subsidiary purpose of this paper is to relate changes in the weight of Calanus finmarchicus to changes in food consumed and to changes in water temperature. Measurements of C. finmarchicus have been made by a number of workers (Adler & Jespersen, 1920; Russell, 1928; Marshall, 1933; Stormer, 1929; Bogorov, 1934; Jespersen, 1939; Clarke & Zinn, 1937). It will be shown that in the North Sea, in spring, the greatest changes in weight are most readily related to changes in quantities of food consumed.

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