Explain the engineering significance of major discontinuity system in Nepal Himalaya. [2070 Magh] [3]

The Nepal Himalaya was formed by the collision of two continental plates: the Tibetan plate and the Indian Plate. It is believed that Indian plate is going down while Eurasian plate (i.e, Tibetan plate is rising over the Indian plate).This action has generated the following major discontinuities parallel to the Nepal himalaya :

• Main Central Thrust (MCT)
• Main Boundary thrust (MBT)
• Main Frontal Thrust (MFT)

Engineering Significances of Discontinuities:

• The thrust zones are weak, porous, unstable and incompetent and hence most undesirable geological features that endanger the stability of engineering structures and also creates leakage problems.
• an active thrust occurring close to an engineering sites is vulnerable to earthquake and as such sites should be avoided from construction of any heavy strucyures.
•  Thrust influences the movement of surface water , also causes  the sudden change in the courses of rivers m....

The Nepal Himalaya was formed by the collision of two continental plates: the Tibetan plate and the Indian Plate. It is believed that Indian plate is going down while Eurasian plate (i.e, Tibetan plate is rising over the Indian plate).This action has generated the following major discontinuities parallel to the Nepal himalaya :

• Main Central Thrust (MCT)
• Main Boundary thrust (MBT)
• Main Frontal Thrust (MFT)

Engineering Significances of Discontinuities:

• The thrust zones are weak, porous, unstable and incompetent and hence most undesirable geological features that endanger the stability of engineering structures and also creates leakage problems.
• an active thrust occurring close to an engineering sites is vulnerable to earthquake and as such sites should be avoided from construction of any heavy strucyures.
•  Thrust influences the movement of surface water , also causes  the sudden change in the courses of rivers may be due to thrusting.
• These thrust zones are prone to landslides, rockfalls, debris flows, earth flows, mudflows etc.