Cyclone and Storm Surge - Iczmpwb.org

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3.14 3.10. CMPO and KMDA (originally CMDA) The first Master Plan for Water Supply and Drainage within Calcutta Metropolitan District for the period 1966-2001, was prepared by the Calcutta Metropolitan Planning Organization (CMPO) in August, 1966 with the assistance of an Engineering Consortium, comprising Metcalf & Eddy Ltd. and Engineering-Science Inc. of USA. The Master Plan included technical and other information of the systems, analysis of the present status and recommendations for future programmes. These are in short as follows: • Destription of the existing infranstructure relating to water supply, sewerage and drainage of the CMP district. • Analysis of the main problems encountered in providing satisfactory service with regard to water supply, sewerage and drainage. • Exploration of alternative sources of water from surface as well as ground water. • Present steps to improve the services in the short term should be integrated with long term proposals to cater to the entire CMD area. • Detailed programming of the proposals including phasing of the main elements and recommendations for competent management circumscribing financial and legal aspects. In the beginning proposals of the CMPO had been implemented by different agencies and departments of the state govt. Later on Calcutta Metropolitan Development Authority, CMDA was established for implementation. 3.11. Present Status of the city’s drainage system The Kolkata Metropolitan area has been divided into 25 drainage basins, wherefrom the drainage is carried off through, a number of natural or man-made channels into the natural trunk drains which are basically tidal rivers and creeks. The present paper limits its scope to the basins and channels which have some bearing on the drainage of the Kolkata Corporation area and its immediate environs. Even now the major and more important parts of the city are drained by two old systems the Town system and the Suburban system.
3.15 3.11.1. The Town System The Town System which is the oldest of the two systems, comprises a set of feeder and trunk sewers (running west to east in general), straddling the underground of the old city that draw the sewage and drainage of the area, measuring about 19.3 sq. km. The trunk sewer running along the APC Ray road from north to south also functions as an intercepting sewer for the trunk sewer like the Baghbazar Street sewer, the Sovabazar Street-Grey Street sewer, the Nimtolla Ghat Street-Beadon Street sewer and the Kolutolla Street-Mirzapore Street sewer. The AJC Bose Road trunk sewer starts at Kidderpore Road close to the Hooghly river runs eastward up to Beckbagan and then turns northward to Moulali. The Lenin Sarani sewer starts near the Hooghly river runs eastward to Moulali. The three trunk sewers viz. the APC Ray Road, the AJC Bose Road and the Lenin Sarani meet at Moulali junction and the combined flow passes further eastward through a special sewer section of 20ft. x 15ft.3in., known as the Town Outfall to the Palmer's Bridge Pumping Station (PBPS), which has an installed capacity of pumping 1720 cusecs. One sewer from Convent Road leads to the PBPS directly. A number of subsidiary pumping stations have been constructed within the drainage area to relieve drainage congestion in chronically waterlogged areas. These are: (1) Belgachia (2) Manicktala (3) Thanthania. It may be pointed out however that part of the Maidan area is now drained directly into Tolly's Nullah, similarly the Thanthania PS delivery sewer discharges directly into the Circular Canal. 3.11.2. The Suburban System The Suburban System developed as a result of later extension of the city towards south. Total drainage area is 25.69 sq. km. In all there are six trunk sewers that convey the sewage and drainage of the area, with the help of the feeder branch and lateral sewers, to the Ballyganj Drainage Pumping Station (BDPS) with an installed capacity of 1275 cusecs. Three trunk sewers run from west to east. These run below (1) Rashbehari Avenue (2) Hazra Road, and (3) Puddapukur Road. Two trunk sewers run from north to south. These are (4) CIT Road (5) Tiljala Road. The sixth one is the one running under Park Street and drains part of the Town System area. In this system also there are a number of subsidiary pumping stations that relieve the individual chronically waterlogged areas. These are : (1) Chelta Lock PS (2) Mominpore PS (3) Jodhpur Park PS (4) Nimak Mahal PS (5) Kalighat PS. Due to some problems in the system the Storm Weather
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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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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
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Page 48 and 49: 2.38 primary mode is centered on th
Page 50 and 51: 2.40 Aquaculture ponds located betw
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Page 54 and 55: 2.44 • Transport the water to the
Page 56 and 57: 2.46 The other type of failure may
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Page 60 and 61: 2.50 embankments. Crops and propert
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Page 68 and 69: 3.6 Figure 3-1. Map of India during
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Page 80 and 81: 3.18 the Bhangar region through the
Page 82 and 83: 3.20 the ocean level as a result of
Page 84 and 85: 3.22 Table 3-6. Major pumping stati
Page 86 and 87: 3.24 Table 3-9. Drainage basin area
Page 88 and 89: 3.26 will lead to significant impro
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Page 92 and 93: 3.30 Respectively. The discharge of
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Page 96 and 97: 3.34 Figure 3-10 shows the tail end
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Page 102 and 103: 4.2 In US, there is a steady decrea
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Page 108 and 109: 4.8 Table 3: Return periods of cycl
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Page 112 and 113: 4.12 work station (the Automated Tr
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Page 116 and 117: 4.16 Mean Low water 1.51 1.39 1.34
Page 118 and 119: 4.18 τx,τy : x and y components o
Page 120 and 121: 4.20 formulation. However, the rete
Page 122 and 123: 4.22 ∂u ~ ∂ ~ ~ ∂ ~ ~ ∂ζ 1
Page 124 and 125: 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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