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6.49 shelterbelt (average 100 m width) comprising of Casurina, Subabul and other cash crops for this stretch will be approximately 1.5 crores ( @ Rs. 50,000 per Ha). 6.7. Cyclone shelters Post Disaster damage assessment studies indicate that cyclone and consequential flooding claim many human lives and livestock in the coastal district of the state. Most of the housing stock in this region is made of temporary roof and wall material – thus being most vulnerable to the high velocity winds and flooding. Vulnerability of housing stock being the prime reason for loss of human life, there is a need to provide community cyclone/flood shelters to offset this situation. Mapping of the vulnerability of human life along with the mapping of cyclone and flood hazards helps in identifying the priority areas for locating cyclone shelters. 12 CD blocks in the South 24 Parganas enlisted below are in dire need for community cyclone shelters – as the existing hosing stock is more vulnerable as well as they are located in areas with very high probability of hazard incidence. Table 6 -1. House type vulnerability in CD blocks identified for community cyclone/flood shelter C.D Block Total no. of Inhabitated villages Population Average population per village % of Houses having temporary roof material % of Houses having temporary wall material Housing Vulnerability Index Cyclone Hazard Level Proposed Cyclone Shelter (no.s) Kultali 43 187989 4372 0.971 0.996 1.997 Very high 172 Basanti 65 278592 4286 0.963 0.991 1.963 Very high 260 Gosaba 50 222822 4456 0.964 0.997 1.977 Very high 200 Mathurapur-II 27 198281 7344 0.937 0.996 1.897 Very high 189 Kakdwip 39 239326 6137 0.907 0.992 1.802 Very high 234 Namkhana 38 160627 4227 0.948 0.995 1.929 Very high 152 Sagar 42 185644 4420 0.964 0.997 1.979 Very high 168 Patharprotima 87 288394 3315 0.967 0.998 1.989 Very high 261 Design consideration for a typical Cyclone Shelter Catcment Area: 2 sq.km approx. or 1000 population, (within 0.75 km travel distance) [Catchment area for cyclone shelter has been reduced due predominance of creeks and channels one has to cross to reach them] Design Capacity: 100 - 120 persons (can be augmented upto 200 – 250 persons by constructing additional floors). This can be used as only cyclone shelter to accommodate nearly 1000 persons (@5 sgft per person). Design Area: 5000 sft (@50 sft per person).
6.50 Plinth Height: min 3.0 m above G.L. [Ground floor stilted] Location: Preferably on high ground and protected by shelter belt plantation. Type of Construction: In accordance to the guidelines prescribed in ‘Improving Wind/Cyclone Resistance - Guidelines’ (1999) by BMTPC (Building Materials and Technology Promotion Council) [Also refer to the NCRMP Guidelines] Approximate Cost of construction: Rs. 1.5 million per unit (assuming construction cost of Rs. 300/sft) Ancillary facilities: 1. Wireless Land Line (WLL) 2. First Aid Kit 3. Preventive health care kit (ORS and other life saving drugs) 4. Safe drinking water storage (At least 1000 liters) 5. Sanitation facility 6. Food reserve for the children, sick and aged population 7. Fuel reserve Alternative usage: Primary school, mass literacy center, community center, mass awareness campaign and other public utility purposes. Total Expenditure: Rs. 245 Crores [construction of 1640 no.s of cyclone shelters @ Rs. 1.5 million] Construction of Community Bovine Shelter The loss of bovines (cattle, buffalo, goat etc.) from cyclone and flooding has serious consequences on the local economy of the rural communities. In addition to the community cyclone shelters for the human beings, the need for community bovine shelter is also increasingly felt to offset this loss. Past experiences and indigenous local knowledge reveal that animals do not die due to rain but due to high velocity wind and gales. A land with an area of approximately 2 acres, located on the high land is adequate to provide shelter to the bovine population of an average village (assuming bovine population not exceeding 4000). Often it is wise to construct fish tanks (land area of 8 acres approx.) next to the bovine shelter so that excavated earth can be used for elevating it to the desired level. Over this elevated land, casurina and subabul (Leucaena leucocephala) plants are to be raised in alternate rows at a distance of 2m from plant to plant. In between the rows, Stylos hemata, a perennial leguminous fodder crop could be grown to augment the fodder needs. Arrangement of this kind will function as a wind break and also protect the animals in deluge. The entire task has to be accomplished upon community initiative. It is expected cost of construction of such typical shelters will be in the range of Rs. 0.75 million including the cost of acquisition
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HAZARD ASSESSMENT AND DISASTER MITI
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Project Team Though the outcome of
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Preamble The State of West Bengal,
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1.2 IMD, in its website (http://www
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1.4 5. Proposals for location of cy
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2.2 region is that which struck the
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2.4 Figure 2-2. Track of the 1970 B
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2.6 The most destructive element as
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2.8 the two regions is rather diffe
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2.10 2.4. The eastern coastal zone
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2.12 velocity is first checked. As
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2.14 Strong winds known as cyclones
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2.16 2.4.6. Soil characteristics Th
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2.18 All rivers have in general sou
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2.20 Another interesting feature of
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2.22 formed does not pose so much o
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2.24 2.4.11. Forest composition The
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2.26 Canning (Bidyadhari Outfall in
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2.28 Administrative information Pop
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2.30 Mangrove plantation beyond the
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2.32 A retired embankment of river
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2.34 The beaches are flattened by s
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2.36 of a doiminant tidalbasin of t
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2.38 primary mode is centered on th
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2.40 Aquaculture ponds located betw
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2.42 All the islands are situated w
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2.44 • Transport the water to the
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2.46 The other type of failure may
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2.48 channel floor, some of the riv
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2.50 embankments. Crops and propert
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2.52 2. To reduce the average dista
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3.2 a storm surge caused by a tropi
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3.4 these merchants may have been t
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3.6 Figure 3-1. Map of India during
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3.8 larger volume of sewage and dra
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3.10 receive, at least during the r
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3.12 3.9. Drainage scheme of Dr. B.
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3.14 3.10. CMPO and KMDA (originall
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3.16 Flows are diverted to the loca
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3.18 the Bhangar region through the
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3.20 the ocean level as a result of
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3.22 Table 3-6. Major pumping stati
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3.24 Table 3-9. Drainage basin area
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3.26 will lead to significant impro
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3.28 locks, one at Chitpur and anot
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3.30 Respectively. The discharge of
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3.32 Figure 3-6. The downstream of
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3.34 Figure 3-10 shows the tail end
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3.36
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3.38
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4.2 In US, there is a steady decrea
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4.4 This shows that Orissa (with 10
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4.6 30 25 20 15 10 Severe Cyclone C
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4.8 Table 3: Return periods of cycl
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4.10 Table 5: The number and return
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4.12 work station (the Automated Tr
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4.14 through this trough into the d
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4.16 Mean Low water 1.51 1.39 1.34
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4.18 τx,τy : x and y components o
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4.20 formulation. However, the rete
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4.22 ∂u ~ ∂ ~ ~ ∂ ~ ~ ∂ζ 1
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4.24 Δ p p(r) = p( ∞) − [1+ (r
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4.26 maximum surge for this event w
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4.28 U-Component of Velocity (Surfa
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4.30 ## ## ## #### ### ## ########
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4.32 V-component of Velocity (Surfa
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4.34 U-component of Velocity (Surfa
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## ################################
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4.38 V-Component of velocity (Surfa
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5.2 particular human settlement to
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5.4 The Composite Vulnerability Ind
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5.6 (2004 prices) prevalent in dist
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5.8 Moyna 0.6280 0.1592 0.542286 0.
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5.10 5.4.2. Social infrastructure H
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5.12 Budge-Budge(Part-II) 0.0000 0.
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5.14 secondary and tertiary activit
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5.16 F i Fˆ i ⎛ Total no. of =
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5.18 Table 5-4: Composite Index of
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Page 222 and 223: Executive Cost Summary of Recommend
Page 224 and 225: References Kanjilal (2005) “Sunde
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