Computer simulations are used in landscape ecology to simulate the eeects of human land-use decisions on the environment. Such decisions are innuenced by both ecological and socioeconomic factors which can be represented by spatially explicit multidisciplinary data. The Land-Use Change Analysis System (or LUCAS) was developed to study the eeects of land-use on landscape structure in such areas as the Little Tennessee River Basin in western North Carolina and the Olympic Peninsula of Washington state. These eeects include land-cover change and species habitat suitability. Using a geographic information system (GIS) to store, display and analyze map layers derived from remotely sensed images, census and ownership maps, topological maps, and output from econometric models, a parallel/distributed version of LUCAS (pLUCAS) was developed for simulations on a network of workstations. Targeting distributed computational environments reeects the resources available to most land-use planners, forestry personnel, and wildlife managers. A performance evaluation of two pLUCAS distributed models on an ATM-based network of 12 SUN Ultra-2 workstations is presented. Particular emphasis is given to the range of speed improvements (relative to serial runs on a single SUN Ultra-2 workstation) that can be obtained using the PVM or MPI message-passing environments .
[1]
David N. Wear,et al.
Public and Private Forest Disturbance Regimes in the Southern Appalachians
,
1993
.
[2]
Joel C. Trexler,et al.
Nontraditional Regression Analyses
,
1993
.
[3]
Jack Dongarra,et al.
PVM: Parallel virtual machine: a users' guide and tutorial for networked parallel computing
,
1995
.
[4]
Jack Dongarra,et al.
MPI: The Complete Reference
,
1996
.
[5]
B. C. Hazen,et al.
Lucas: a system for modeling land-use change
,
1996
.
[6]
B. C. Hazen,et al.
The simulation of land-cover change using a distributed computing environment
,
1997,
Simul. Pract. Theory.
[7]
R. O. Flamm,et al.
Alternative model formulations for a stochastic simulation of landscape change
,
1994,
Landscape Ecology.