As an efficient way to stimulate the growth of economy, tourism is promoted by most counties allover the world, and has
become one of the world's largest and fastest-growing industries. Essentially, tourism is a spatiotemporal system, with
tourist attractions located in different geographic areas and tourist flows exchanging between different geographic
regions. In this paper, we present a dynamic model for the simulation of tourism and tourist's activities in the context of
GIS and stochastic method, using a case of the Beijing-Tianjin-Hebei region. The model is developed on stochastic
method and multiple geospatial data sources. In the model, the spatiotemporal behavior of tourist on the Earth's Surface
is governed by the evolution rules, which are extracted from the researches on tourist's activities and executed via
stochastic method and multiple geospatial data. By means of the model, we simulate the tourism in the Beijing-Tianjin-
Hebei region, and find that there is good correspondence between the tourist arrivals calculated with the model and those
obtained from the tourism statistics. This shows that the animated dynamic modeling of tourism based on geospatial data
can be used as an indicator of the tourism in the realistic world, and is also can be embedded in the GIS applications.
On May 12th 2008, an 8.0 magnitude earthquake struck in Southwest China, triggered massive landslides and created
many unstable and dangerous quake lakes. As a secondary disaster of earthquake, Quake Lake usually breaks after
damming up a large amount of water and threatens cities and villages in the downstream area. This paper is devoted to
modeling the dam break and analyzing the flow hydrograph coming out of the breach for quake lakes with the BREACH
method. We simulate the formation of dam breach and the flood discharge with a case of the Tangjiashan Quake Lake,
and analyze the hydraulic impacts of dam-break flood on the downstream areas. The results can facilitate the assessment
on the flood risk of quake lake caused by earthquake, and also can be used to estimate the magnitude and extent of dambreak
flood with Earth observations.
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