Environmental Engineering Reference
In-Depth Information
Table 19.1 Case studies using the Glumsø model as platform for development (type of system,
system name, level of model development, modifications needed; modified from Jørgensen and
Bendoricchio 2001)
Lakes, shallow
System
Modifications made
Level
One layer
Glumsø version A
Basic version
7
Glumsø, version B
Non-exchangeable nitrogen
7
Lake Gyrstinge
Level fluctuations, sediments exposed to
air
4-5
Lake Lyngby
Basic version
6
Lake Bergunda
Nitrogen fixation
2
Broia Reservoir
Macrophytes, two boxes
2
Lake Great Kattinge
Re-suspension
5
Lake Svogerslev
Re-suspension
5
Lake Bue
Re-suspension
5
Lake Kornerup
Re-suspension
5
Lake Søbyg˚rd
Structural dynamic model
6
Lake Balaton
Adsorption to suspended matter
2
Lake Annone
Structural dynamic model
6
Lake Balaton
Structural dynamic model
6
Lake Mogan
Only P-cycle, structural dynamics,
competition between submerged
vegetation and phytoplankton
6
Stadsgraven,
Copenhagen
4-6 interconnected basins
5/6
Copenhagen, inner
lakes
5-6 basins
5
Lakes, deep more
layers/boxes
Lake Victoria
Boxes, thermocline, other food chain
4
Lake Kyoga
Other food chain
4
Lake Mobuto Sese
Seko
Boxes, thermocline, other food chain
4
Lake Fure
Boxes, nitrogen fixation thermocline
7
Lake Esrom
Boxes, Si-cycle, thermocline
4
Estuaries
Ringkøbing Firth Boxes, nitrogen fixation 5
Roskilde Fjord Complex hydrodynamics 4
Lagoon of Venice Ulva/Zostera competition 6
Level indication: 1 - conceptual diagram selected, 2 - verification has been carried out,
3 - calibration using intensive measurements, 4 - calibration of the entire model, 5 - validation:
object function and regression coefficient has been found, 6 - validation of a prognosis for
significant changed loading has been carried out or the development of structural dynamic
model (SDM), 7 - validation of a prognosis and development of SDM
important ones and which ones were negligible. Since eutrophication was in the
focus, nutrient dynamics and the dominant animal, plant and microbial species
involved in the turnover of mineral nutrients and primary production were most
relevant. To what extent the inclusion of particular species was necessary or whether
an aggregated representation (as a black box) was sufficient, was largely discussed
(e.g. Jørgensen et al. 1978). It was already at an early state discussed for how long
the “final” structure would be able to simulate the system in a quantitatively reliable
manner. Retrospectively, it turned out that with the improvement in the condition of
