With aircraft, other factors affecting optimum cruise altitude include payload, center of gravity, air temperature, humidity, and speed. This altitude is usually where the higher ground speeds, the increase in aerodynamic drag power, and the decrease in engine thrust and efficiency at higher altitudes are balanced. Typical cruising airspeed for a long-distance commercial passenger aircraft is 475â500 knots (878â926 km/h; 546â575 mph).
The process of saturation and slumping continues, leading to failure of dam. c) Structural Failure: About 25% of failure is attributed to structural failure, which is mainly due to shear failure causing slide along the slopes. The failure may be due to:
Intense rainfall can also cause the overflow of lakes and rivers. If a large mass of snow melts all at onc â¦ e it can also cause a flood. Floods usually result from excessive rainfall or from rough waves along coastal lowlands, and is either clogged or baked up. Floods are also caused by erosion.