Natural Disasters and Precautions May, 2008 16 am 10 Mianyuan River (N3 1 28' 58 ",E 104 09' 02) located in Tianchi Township, Mianzhu City, the hardest hit area of the earthquake.

(1) Remote sen

Natural Disasters and Precautions May, 2008 16 am 10 Mianyuan River (N3 1 28' 58 ",E 104 09' 02) located in Tianchi Township, Mianzhu City, the hardest hit area of the earthquake.

(1) Remote sensing? It has the characteristics of large detection range, large amount of information, fast acquisition speed, good real-time performance and strong dynamics. (3 points)

(2) Hazard: destroying houses and increasing casualties; Blocking rivers, forming dammed lakes and inducing secondary disasters such as floods and mudslides. (2 points)

Impact: blocking traffic, increasing the difficulty of rescue and prolonging the rescue time.

(3) Typhoon, cold wave, rainstorm, snowstorm, flood, sandstorm, sea ice, forest fire, red tide, locust plague, debris flow and tsunami. (5 points)

Test analysis:

(1) The application fields of geographic information technology mainly include: the application of remote sensing (RS) in resource investigation, environment and disaster monitoring (which can estimate crop yield and contribute to disaster prevention and reduction); Application of Global Positioning System (GPS) in positioning and navigation (mainly used for in-situ positioning and navigation); The role of geographic information system in urban management (for urban information management and service, traffic road management, environmental management, urban planning, disaster prevention and mitigation, etc.). Remote sensing technology is used to obtain images. Compared with traditional monitoring methods, remote sensing technology has the characteristics of large detection range, large amount of information, fast acquisition speed, good real-time performance and strong dynamics.

(2) The hazards brought by landslides include destroying houses and increasing casualties; Blocking rivers, forming dammed lakes and inducing secondary disasters such as floods and mudslides. The impact on disaster relief work is to block traffic, increase the difficulty of rescue and extend the rescue time.

(3) Remote sensing technology can monitor typhoons, cold waves, rainstorms, snowstorms, floods, sandstorms, sea ice, forest fires, red tides, locust plagues, mudslides and tsunamis.