The device takes the form of steel pipe dropped into a slope.The borehole is filled in with gravel around the pipe to help transmit highfrequency vibrations generated by particles within the slope.These vibrations pasg up the tube and are picked up by a sensor on the surface.Software analyses the vibration signal to determine whether a landslide may be imminent.
The device is cmTently being tested in a 6一metretall artificial clay embankment in Newcastle.UK.Early results suggest it should provide tewer false positives than existing systems.Once it has been carefully and thoroughly tested,the device could be used to create a complete earlywarning system for dangerous slopes.
Locations with a significant risk of landslides could definitely benefit from a machine like this,says Adam Poulter,an expert at the British Red Cross.As long as it doesnt cost too much.But,Pouher adds that an earlywarn-
ing system may not be enough on it own.You need to have the human communication,he says.Making systems that
get warnings to those who need them can be difficult.
1.What doesSuch natural disastersin the first paragraph refer to?
A.Sudden,heavy rainfall.
B.Earthquakes
C.Water erosion D.Landslides
2.Which of the following statements is true of landslides?
A.The initial movement is hard to spot
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