TY  - JOUR
A1  - van Gerven, Luuk P. A.
A1  - Brederveld, Robert J.
A1  - de Klein, Jeroen J. M.
A1  - DeAngelis, Don L.
A1  - Downing, Andrea S.
A1  - Faber, Michiel
A1  - Gerla, Daan J.
A1  - Janse, Jan H.
A1  - Janssen, Annette B. G.
A1  - Jeuken, Michel
A1  - Kooi, Bob W.
A1  - Kuiper, Jan J.
A1  - Lischke, Betty
A1  - Liu, Sien
A1  - Petzoldt, Thomas
A1  - Schep, Sebastiaan A.
A1  - Teurlincx, Sven
A1  - Thiange, Christophe
A1  - Trolle, Dennis
A1  - van Nes, Egbert H.
A1  - Mooij, Wolf M.
T1  - Advantages of concurrent use of multiple software frameworks in water quality modelling using a database approach
JF  - Fundamental and applied limnology : official journal of the International Association of Theoretical and Applied Limnology
N2  - Water quality modelling deals with multidisciplinary questions ranging from fundamental to applied. Addressing this broad range of questions requires multiple analysis techniques and therefore multiple frameworks. Through the recently developed database approach to modelling (DATM), it has become possible to run a model in multiple software frameworks without much overhead. Here we apply DATM to the ecosystem model for ditches PCDitch and its twin model for shallow lakes PCLake. Using DATM, we run these models in six frameworks (ACSL, DELWAQ, DUFLOW, GRIND for MATLAB, OSIRIS and R), and report on the possible model analyses with tools provided by each framework. We conclude that the dynamic link between frameworks and models resulting from DATM has the following main advantages: it allows one to use the framework one is familiar with for most model analyses and eases switching between frameworks for complementary model analyses, including the switch between a 0-D and 1-D to 3-D setting. Moreover, the strength of each framework - including runtime performance - can now be easily exploited. We envision that a community-based further development of the concept can contribute to the future development of water quality modelling, not only by addressing multidisciplinary questions but also by facilitating the exchange of models and process formulations within the community of water quality modellers.
KW  - Database Approach To Modelling
KW  - DATM
KW  - PCLake
KW  - PCDitch
KW  - OSIRIS
KW  - ACSL
KW  - R
KW  - GRIND
KW  - DUFLOW
KW  - DELWAQ
KW  - Modelling Framework
KW  - Model Implementation
KW  - Model Analysis
KW  - Differential Equations
KW  - Community-based Modelling
Y1  - 2015
U6  - https://doi.org/10.1127/fal/2015/0631
SN  - 1863-9135
VL  - 186
IS  - 1-2
SP  - 5
EP  - 20
PB  - Schweizerbart
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Lischke, Betty
A1  - Hilt, Sabine
A1  - Janse, Jan H.
A1  - Kuiper, Jan J.
A1  - Mehner, Thomas
A1  - Mooij, Wolf M.
A1  - Gaedke, Ursula
T1  - Enhanced input of terrestrial particulate organic matter reduces the resilience of the clear-water state of shallow lakes: A model study
JF  - Ecosystems
N2  - The amount of terrestrial particulate organic matter (t-POM) entering lakes is predicted to increase as a result of climate change. This may especially alter the structure and functioning of ecosystems in small, shallow lakes which can rapidly shift from a clear-water, macrophyte-dominated into a turbid, phytoplankton-dominated state. We used the integrative ecosystem model PCLake to predict how rising t-POM inputs affect the resilience of the clear-water state. PCLake links a pelagic and benthic food chain with abiotic components by a number of direct and indirect effects. We focused on three pathways (zoobenthos, zooplankton, light availability) by which elevated t-POM inputs (with and without additional nutrients) may modify the critical nutrient loading thresholds at which a clear-water lake becomes turbid and vice versa. Our model results show that (1) increased zoobenthos biomass due to the enhanced food availability results in more benthivorous fish which reduce light availability due to bioturbation, (2) zooplankton biomass does not change, but suspended t-POM reduces the consumption of autochthonous particulate organic matter which increases the turbidity, and (3) the suspended t-POM reduces the light availability for submerged macrophytes. Therefore, light availability is the key process that is indirectly or directly changed by t-POM input. This strikingly resembles the deteriorating effect of terrestrial dissolved organic matter on the light climate of lakes. In all scenarios, the resilience of the clear-water state is reduced thus making the turbid state more likely at a given nutrient loading. Therefore, our study suggests that rising t-POM input can add to the effects of climate warming making reductions in nutrient loadings even more urgent.
KW  - climate change
KW  - PCLake
KW  - bistability
KW  - alternative stable states
KW  - critical nutrient loading
KW  - ecosystem modeling
KW  - allochthony
KW  - t-POM
Y1  - 2014
U6  - https://doi.org/10.1007/s10021-014-9747-7
SN  - 1432-9840
SN  - 1435-0629
VL  - 17
IS  - 4
SP  - 616
EP  - 626
PB  - Springer
CY  - New York
ER  -