In order to verify and quantify the efficacy of management strategies utilized to improve the water quality of Lake Piediluco in the long and short term, a model was developed to represent the unsteady and three-dimensional form of eutrophication processes and water anoxia phenomena. Such a model, taking into account the hydrodynamic mean and turbulent characteristic of the lake, allows the simulation of the spatial and temporal evolution of the concentration fields of the following species: (a) in water, dissolved oxygen, algal organic carbon, particulate organic carbon, dissolved organic carbon, orthophosphate, hydrogen sulphide; and (b) in sediments, dissolved oxygen, particulate organic carbon, dissolved organic carbon, orthophosphate, adsorbed phosphorus, hydrogen sulphide. This paper presents the simulation results using the following configurations characterized by: different hydraulic regimes of the lake; different external phosphorus loads introduced into the lake from discharges; different initial adsorbed phosphorus concentrations in sediments (obtainable by sediment reclaim) in certain critical areas of the lake. The simulations have detailed: (1) the characterisation of the lake's eutrophication behaviour in its present state and the vulnerability of the different areas of the lake to summer water anoxia; (2) the role of external and internal phosphorus loads on the eutrophication processes; and (3) the management options to improve the environmental conditions of the lake. © 2000 Elsevier Science B.V.
Response of Lake Piediluco to the change of hydrodynamic conditions and nutrient load reductions / Cioffi, Francesco; Gallerano, Francesco. - In: ECOLOGICAL MODELLING. - ISSN 0304-3800. - STAMPA. - 135:2-3(2000), pp. 199-229. [10.1016/s0304-3800(00)00366-5]
Response of Lake Piediluco to the change of hydrodynamic conditions and nutrient load reductions
CIOFFI, Francesco;GALLERANO, Francesco
2000
Abstract
In order to verify and quantify the efficacy of management strategies utilized to improve the water quality of Lake Piediluco in the long and short term, a model was developed to represent the unsteady and three-dimensional form of eutrophication processes and water anoxia phenomena. Such a model, taking into account the hydrodynamic mean and turbulent characteristic of the lake, allows the simulation of the spatial and temporal evolution of the concentration fields of the following species: (a) in water, dissolved oxygen, algal organic carbon, particulate organic carbon, dissolved organic carbon, orthophosphate, hydrogen sulphide; and (b) in sediments, dissolved oxygen, particulate organic carbon, dissolved organic carbon, orthophosphate, adsorbed phosphorus, hydrogen sulphide. This paper presents the simulation results using the following configurations characterized by: different hydraulic regimes of the lake; different external phosphorus loads introduced into the lake from discharges; different initial adsorbed phosphorus concentrations in sediments (obtainable by sediment reclaim) in certain critical areas of the lake. The simulations have detailed: (1) the characterisation of the lake's eutrophication behaviour in its present state and the vulnerability of the different areas of the lake to summer water anoxia; (2) the role of external and internal phosphorus loads on the eutrophication processes; and (3) the management options to improve the environmental conditions of the lake. © 2000 Elsevier Science B.V.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.