Cyclone and Storm Surge - Iczmpwb.org

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2.4 Figure 2-2. Track of the 1970 Bhola (Bangladesh) cyclone (Change of strength is not clearly shown, but is estimated to be definitely on the higher side of magnitude 5) Figure 2-3. Track of the 1991 Bangladesh cyclone
2.5 Figure 2-4. Track of the 1999 Orissa cyclone 2.2. Impact on life and property A mature tropical cyclone can release heat at the rate of 6x10 14 Watts or more (NASA, 2000). The most devastating effects of a tropical cyclone occur when they cross coastline, making landfall. India Meteorological Department (website: http://www.imdmumbai.gov.in/cycdisasters.htm), mentions that there are three elements associated with a cyclone, which cause destruction. These are: • Cyclones are associated with high-pressure gradients and consequent strong winds. These, in turn, generate storm surges. A storm surge is an abnormal rise of sea level near the coast caused by a severe tropical cyclone; as a result, sea water inundates low lying areas of coastal regions drowning human beings and livestock, eroding beaches and embankments, destroying vegetation and reducing soil fertility. • Very strong winds may damage installations, dwellings, communication systems, trees, etc. resulting in loss of life and property. • Heavy and prolonged rains due to cyclones may cause river floods and submergence of low lying areas by rain causing loss of life and property. Floods and coastal inundation due to storm surges pollute drinking water sources. It may be mentioned that all the three factors mentioned above occur simultaneously and, therefore, relief operations for distress mitigation become difficult. So it is imperative that advance action is taken for relief measures before the commencement of adverse weather conditions due to cyclones.
Page 2 and 3: HAZARD ASSESSMENT AND DISASTER MITI
Page 4 and 5: Project Team Though the outcome of
Page 6 and 7: Preamble The State of West Bengal,
Page 8 and 9: 1.2 IMD, in its website (http://www
Page 10 and 11: 1.4 5. Proposals for location of cy
Page 12 and 13: 2.2 region is that which struck the
Page 16 and 17: 2.6 The most destructive element as
Page 18 and 19: 2.8 the two regions is rather diffe
Page 20 and 21: 2.10 2.4. The eastern coastal zone
Page 22 and 23: 2.12 velocity is first checked. As
Page 24 and 25: 2.14 Strong winds known as cyclones
Page 26 and 27: 2.16 2.4.6. Soil characteristics Th
Page 28 and 29: 2.18 All rivers have in general sou
Page 30 and 31: 2.20 Another interesting feature of
Page 32 and 33: 2.22 formed does not pose so much o
Page 34 and 35: 2.24 2.4.11. Forest composition The
Page 36 and 37: 2.26 Canning (Bidyadhari Outfall in
Page 38 and 39: 2.28 Administrative information Pop
Page 40 and 41: 2.30 Mangrove plantation beyond the
Page 42 and 43: 2.32 A retired embankment of river
Page 44 and 45: 2.34 The beaches are flattened by s
Page 46 and 47: 2.36 of a doiminant tidalbasin of t
Page 48 and 49: 2.38 primary mode is centered on th
Page 50 and 51: 2.40 Aquaculture ponds located betw
Page 52 and 53: 2.42 All the islands are situated w
Page 54 and 55: 2.44 • Transport the water to the
Page 56 and 57: 2.46 The other type of failure may
Page 58 and 59: 2.48 channel floor, some of the riv
Page 60 and 61: 2.50 embankments. Crops and propert
Page 62 and 63: 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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5.20 M ′ = H M ′′ = I . S whe
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Chapter Six Mitigation Strategies a
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6.3 Beside these differences in lev
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6.5 • to reduce the destructive f
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6.7 6.2.4. Methods of Construction
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6.9 is attached to the structure. T
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6.11 (b) Medium rivers to armour th
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6.13 Likewise, in all the embankmen
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6.15 Figure 6 -5 Figure 6 -6 Figure
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6.17 Benefit cost ratio Area benefi
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6.19 Location and cost of proposed
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6.21 Swaraupnagar Swaraupnagar 100
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6.23 Gobadia Kakdwip Dk Kasiabad &
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6.25 Location and cost of proposed
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6.27 " Jagaddal " 800 6400000 " Jag
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6.29
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6.31
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6.33
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6.35 Figure 6 -11 Figure 6 -12
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6.37 Figure 6 -15 Figure 6 -16
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6.39 Figure 6 -19 6.2.7. Recommenda
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6.41 4. Rajraj Swarup & Ramnagar Ab
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6.43 project. Such sediment deficit
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6.45 paludosa, Rhizophora apiculata
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6.47 15. Ceriops tagal 0.22 0.40 0.
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6.49 shelterbelt (average 100 m wid
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6.51 (assuming land acquisition cos
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6.53 location are missing reducing
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7.2 resulted in large scale waterlo
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7.4 5. No adverse effect in drainin
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7.6 15 LT Panel L.S. 2,200,000 16 I
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7.8 Bagjola, Kestopur and SWF chann
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Executive Cost Summary of Recommend
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References Kanjilal (2005) “Sunde
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“……………….Designingadis
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