Question

State any two method of mass protect​

Answer 1

Explanation:

2.6.2. Limitations

In underdeveloped countries, there are several limitations for UV disinfection. The major limitation is the energy requirement. In many systems, the electric power supply cannot be guaranteed.

A limitation might be that there is not even a single test available to examine the proper disinfection of the rays. It is only effective as a primary disinfectant as it does not leave any residues. It does not act as a secondary disinfectant as it

Answer 2

Answer:

Mass movement control tends to be both expensive and far from simple. Unlike sheet or linear erosion control, mass movement control often means preventing rainwater from soaking into the soil, adding to the weight of the soil cover and rapidly reaching the slide bed-plane. The surface is therefore drained to evacuate runoff to less vulnerable zones, generally the convex sections of a slope. The zone over the slide bed-plane can be drained in depth to prevent interstitial pressure from detaching the soil cover from the stable zone beneath the slide bed-plane.

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