The increasing pore-water pressures caused by the change of water level in the overburden layer is the main reason of inducing many natural landslides in Sweden, Norwegian and Canada.

• 如瑞典、挪威和加拿大的天然滑坡,大都是由于覆盖层中地下水位的增加引起孔隙水压力增大而诱发的。