Biodiversity ; China ; Ecosystem ; Geographical information system ; Human impact ; Humid environment ; Impact ; Remote sensing ; Sichuan ; Simulation ; Spatial variation
Thiss paper describes how to combine GIS with geo-informatics and geography to simulate the wetland changes happened in Jianghan Plain in the middle reaches of the Yantze River in the last 40 years, and present the results. The environmental
Spaces of surveillant simulation : new technologies, digital representations, and material geographies
Pratique sociale ; Service ; Simulation ; Système d'information géographique ; Système de surveillance ; Technologie ; Télématique
Geographical information system ; Service ; Simulation ; Social practice ; Surveillance system ; Technology ; Telematics
L'A. explore les mutations technologiques qui supportent une simulation de surveillance et se demande comment les relations entre surveillance, simulation et géographies matérielles ont été évoquées dans les récentes discussions sur la société
Aeolian features ; Aeolian transport ; Arid area ; Coastal environment ; Dune ; Grain size distribution ; Model ; Moisture ; Programming ; Simulation ; Slope gradient
A computer program has been developed to simulate two- or three-dimensional topographic change associated with aeolian sediment transport. This program includes a number of models and provides for interactive selection of a desired model combination
(s), to allow for comparison between model predictions. Examples of results are presented, and considerations regarding the simulation procedure are discussed. Areas where further refinement is needed to improve correspondence with reality
Three themes have been chosen for this report. The first is a methodological one, underlining the continuing importance of numerical simulation techniques in the investigation of small-scale climatic phenomena. The two remaining themes explore
Climatic variability ; Forecast ; Interannual variability ; Model ; Simulation ; Statistics ; Time series ; United States of America ; Wind ; Wind speed
The focus of this research is the development, evaluation, and implementation of a mathematical/statistical time-series model to simulate daily total wind energy in the central United States. By modeling the annual cycle, sub-annual cycles
L'A. développe un modèle de simulation pour estimer le calendrier optimal et l'impact maximal d'une réhabilitation complète du stock de logements néo-zélandais. Le modèle est basé sur les théories de la dynamique des populations.
Bassin-versant ; Hypsométrie ; Modèle ; Pente de versant ; Ruissellement ; Réseau de drainage ; Simulation de pluie ; Transport sédimentaire
Drainage network ; Hypsometry ; Model ; Rainfall simulation ; Rill wash ; Sediment transport ; Slope gradient ; Watershed
network and catchment geometry. They show that the width to length ratio of the catchment has a significant influence on the shape of the hypsometric curve, though little on the hypsometric integral. Experimental results for simulated landforms from
a small-scale rainfall-erosion simulator are reported.
This paper reports on a series of wind-tunnel simulations of the development of a deflation lag with natural pebbles of varied sizes, shapes and placements. Following the stabilization of the surface, an external upwind source of sand was introduced
, and the adjusted transport of these foreign particles over the lag surface was monitored. Changes in the exposure of the lag elements and the characteristics of the boundary layer were also measured throughout the simulation.
Computer simulation of household activity scheduling
Choix du lieu d'achat ; Choix modal ; Choix spatial ; Comportement ; Comportement des ménages ; Espace d'activité ; Espace-temps ; Simulation ; Trajet
Activity space ; Behaviour ; Household behaviour ; Mode choice ; Shopping trip choice ; Simulation ; Space time ; Spatial choice ; Trip
au cours d'un cycle de temps donné. Des simulations numériques montrent les effets réels des heures de travail, du lieu de vie et de la vitesse de déplacement. Discussion sur les améliorations nécessaires de la théorie (effets d'apprentissage et choix
Climatic variation ; Global change ; Model ; Poland ; Regional climate ; Simulation
weather model, a stochastic weather generator simulating daily values for elements of the climate. An attempt to verify the model was made on the basis of data for the Zamość weather station. Discussion of the results.
Ethnic community ; Ethnic group ; Index ; Measurement ; Segregation ; Simulation ; United States of America
fondé sur une mesure existante pour un système multi-groupes. Il peut refléter le potentiel d'interaction spatiale entre les groupes. Simulation et étude empirique sur le Connecticut.
Agriculture ; Analyse systémique ; Consommation ; Engrais azoté ; France ; Modèle ; Politique agricole ; Prospective ; Simulation
Agricultural policy ; Agriculture ; Consumption ; France ; Model ; Nitrogen fertilizer ; Prospective study ; Simulation ; System analysis
modélisation, dires d'experts et simulations. Au-delà de cet apport méthodologique, cet article donne une vision prospective globale de l'agriculture en 2010.
The geomorphic model, SIBERIA, is calibrated on hydrologic and erosion data collected by a combination of monitoring and rainfall simulation experiments on the waste rock dumps of Ranger. This model is used to predict the evolution of the proposed
Laboratory experiment and digital simulation of multiple fill-cut terrace formation
The formation mechanism of multiple erosional terraces which develop in the dissection process of sedimentary valley fills was investigated by laboratory experiments and computer simulations. Sequences of unpaired terraces were produced
Effects of direct and indirect heating on the validity of rock weathering simulation studies and durability tests
, Dunhouse sandstone, Antrim basalt and Mourne granite. The possible implications of variable temperature response for the design of weathering simulation studies and standard durability tests will then be examined.
Mechanisms of loess-sized quartz silt production and their relative effectiveness : laboratory simulations
In this study a series of laboratory simulations was set up, with the purpose to demonstrate that a range of geomorphic mechanisms are capable of producing silt under laboratory conditions. The geomorphic mechanisms investigated were : aeolan