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Spatial System Dynamics: New Approach for Simulation of Water Resources Systems

Summary: Spatial System Dynamics: New Approach for Simulation of
Water Resources Systems
Sajjad Ahmad, M.ASCE,1
and Slobodan P. Simonovic, M.ASCE2
Abstract: A new approach called spatial system dynamics (SSD) is presented to model feedback based dynamic processes in time and
space. This approach is grounded in control theory for distributed parameter systems. System dynamics and geographic information
system (GIS) are coupled to develop this modeling approach. The SSD modeling approach offers a single modeling framework for
developing conceptually different models. It also provides the much-needed capability to model feedback based complex dynamic
processes in time and space while giving insight into the interactions among different components of the system. The proposed approach
is superior to existing techniques for dynamic modeling such as cellular automata and GIS and addresses most of the limitations present
in these approaches. The SSD approach can be used to model a variety of physical and natural processes where the main interest is the
space­time interaction, e.g., environmental/water resources processes, natural resources management, climate change, and disaster man-
agement. The applicability of the proposed approach is demonstrated with an application to flood management in the Red River basin in
Manitoba, Canada.
DOI: 10.1061/(ASCE)0887-3801(2004)18:4(331)
CE Database subject headings: Spatial distribution; Geographic information systems; Water resources management; Flood control;
Time dependence; Simulation.
Natural and human systems have a high level of dynamic com-
plexity. It can arise even in simple systems from the interaction


Source: Ahmad, Sajjad - Department of Civil and Environmental Engineering, University of Nevada at Las Vegas


Collections: Engineering