Advances in Environmental Modelling

I. Introduction. On mathematical models of natural systems (A. Marani). II. Ecology and Hydrology. Paleoecologic modeling of hydrologic processes (A. Bale et al.). Modeling urban runoff pollution during winter and off-winter periods (V. Novotny). Distribution and persistence of aldicarb residues in the sand-and-gravel aquifer of central Wisconsin. 1. Relationship between aldicarb residue concentrations and groundwater chemistry (F.N. Fathulla et al.). 2. Simulation of aldicarb residue distributions in groundwater using a combined leaching and groundwater transport model (F.A. Jones et al.). An evaluation of point and non point source loads of nutrients to a highly eutrophic lake (M. Camusso, G. Tartari). III. Systems Theory and Modelling Techniques. Indices of topological structure in ecology (R.W. Bossermann). Pecos: an expert system for oil spill emergency (L. Ceffa, E. Baldassarre). An application of the theory of catastrophe to the eutrophication of the Venice Lagoon (G. Bendoricchio). Environmental data processing through fuzzy clustering (S. Marsili, S. Libelli). An improved ranking scheme for environmental hazard (M.G. Reggiani, E. Halfon). Stability of controlled age-structured populations (S. Muratori, S. Rinaldi). IV. Terrestrial Ecosystems. Modelling response of vegetation to both excess CO 2 and airborne nitrogen compounds within a global carbon cycle model (G.H. Kohlmaier et al.). A simulation model using environmental cues to predict phenomenologies of winter and summer annuals in the northern Chihuahuan Desert (D. Bachelet et al.). Validation of landscape models (J.T. Finn). Monitoring and risk of extinction in the optimal exploitation of populations (C. Wissel, T. Schmitt). Environmental impact of air pollutants with emphasis on crops: the Piacenza case study (M.C. Cirillo et al.). Modelling sediment and radionuclide transport in the Po River. The Cadraf code (M. Andreola et al.). Modelling the contamination of agricultural products by lead and cadmium (S.E. Jorgensen). V. Marine and Coastal Ecosystems. Paradoxical growth in the Messina Strait. Models and explanations (C.J. Puccia, F.A. Ascioti). The calculation of primary production in an estuary. A model that incorporates the dynamic response of algae, vertical mixing and basin morphology (O. Klepper et al.). Comparison between coastal runoff patterns from CZCS imagery and from a general circulation model (A. Bergamasco, V. Barale). Identification techniques in modelling eutrophication phenomena of the Adriatic Sea (S. Beghelli et al.). The validation of scientific assessment of an ecosystem model of the Bristol Channel (P.J. Radford et al.). Using the coastal ecological landscape spatial simulation (CELSS) model for wetland management (R. Costanza et al.). VI. Lakes, Lagoons and Wetlands. Verification of a dispersion model for the lagoon of venice by temperature measurements (G. Di Silvio, G. Fiorillo). Hydrocarbons spreading in Venice Lagoon. Experimental verification (F.