Cyclone and Storm Surge - Iczmpwb.org

5.9
the time required to restore the road connectivity, the mobility in the primary (within CD block),
secondary (district level) and tertiary catchment (intra region) area will be affected.
The index of road connectivity (A) along with its normalized value has been calculated as shown
following.
⎛ X
Ai
=
⎜
⎝ Yi
where,
X
Y = Total area in sq.
kms in ith CD block
i
Z
i
i
i
Aˆ
=
i
⎞ ⎛ X ⎞
i
⎟.
⎜
Z
⎟
⎠ ⎝ i ⎠
= Total length of roads in kms in ith CD block
= Total population in '000 persons in ith CD block
A
A
max
max
− Ai
− A
min
Access to safe drinking water source is one of the most crucial parameters which dictate the
incidence of epidemics especially from water borne diseases in the aftermath of flood. Tropical
cyclones, often leading to inundation and flooding contaminate the sources of the drinking water
creating pathogenic condition and increasing the chances of mortality and morbidity in child and aged
section of the population. Similarly, sources of defecation will guide the extent of contamination of the
local water sources as well as the level of environmental degradation after the flooding. The
vulnerability of water supply and sanitation facilities are estimated based on the percentage share of
the households having access to sources of water with low chances of contamination (Tap and Tube
well) as well as access to hygienic defecation facilities (Pit latrine and Water closet).
⎛ X
i
⎞
Bi
=
⎜
Z
⎟.100
⎝ i ⎠
⎛ Yi
⎞
Ci
=
⎜ .100
Z
⎟
⎝ i ⎠
where,
X
= Total no.
of HH having access to safe drinking water in i th CD block
Yi
= Total no.
of HH having access to safe sanitation facility in i th CD block
Z = Total no.
of HH in i th CD block
i
i
Bˆ
i
=
B
B
max
max
− Bi
− B
min
ˆ C
Ci
=
C
max
max
− Ci
− C
min