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7.2 resulted in large scale waterlogging. Water receded slowly, the inadequate drainage capacities of the channels being one of the main hindrances. The important locations where waterlogging takes place are shown in the annexed figures. The cross sections of some of the drainage channels are also shown. 7.2. Past proposals for improvement of drainage of Kolkata A scheme, titled "Development of Comprehensive Drainage System in Kolkata Metropolitan Areas on the eastern bank of river Hooghly" was accordingly prepared following the recommendations of a High Powered Committee under the chairmanship of Dr. P.N. Roy constituted by Govt. of West Bengal in 1999 following an acute drainage congestion faced during the year. The work is under the aegeis of Housing Urban Development Corporation (HUDCO) loan assistance procured through West Bengal Infrastructure Development Finance Corporation (WBIDFC) Ltd. The scheme aims at better efficiency towards restoring the drainage system in and around Kolkata Metropolis and its environs as per original design stipulation and to remove the inherent impasse as far as possible. The scheme includes excavation of DWF, THC - SHC - SWF System, Bagjola Khal, Circular Beliaghata Khal, Kestopur-Bhangarkata Khal, and Pump House at outfall point at Kulti etc. 7.3. Recommendations for further drainage improvement The following schemes need to be implemented for proper storm water disposal for the city of Kolkata and surrounding urbanised areas like Bidhan Nagar and adjacent upcoming new township of Rajarhat. These schemes have been decided jointly by the Kolkata Municipal Corporation and the Irrigation and Waterways Department, Government of West Bengal. 1. Construction of additional pumping station at Maniktala within the existing with a force main delivery leading to the circular canal. Estimated cost: Rs. 6,00,00,000. 2. Construction of lifting station on the bank of Kestopur canal to remove waterlogging at Maniktala area. . Estimated cost: Rs. 10,00,00,000. 3. Construction of lifting station on the bank of Beliaghata canal to remove waterlogging near Eastern metropolitan Bye Pass. . Estimated cost: Rs. 4,00,00,000. 4. Construction of a pumping station at the junction of K K tagore street and Strand Bank Road / Jackson Ghat. Estimated cost: Rs. 5,00,00,000.
7.3 5. Construction of a pumping station at D N Mitra square in ward number 70. Estimated cost: Rs. 14,00,00,000. 6. Augmentation of drainage pumping stations of the Kolkata Municipal Corporation. Estimated cost: Rs. 17,00,00,000. 7. Construction of a super-pumping station across the SWF channel near Ghushighata of a capacity 31 cumecs. Estimated cost: Rs. 18,00,00,000. 8. Construction of pumping stations at outfalls of Kestopur canal and Tolly’s Nullah. Estimated cost: Rs. 2,00,00,000. 9. Construction of a pumping station near Humanity Hospital at Kalagachhia of a capacity 13.5 cumecs. Estimated cost: Rs. 1,00,00,000. 10. Construction of a sluice at the junction of Tolly’s Nullah and River Hooghly near Daighat at Khidderpore. Estimated cost: Rs. 8,00,00,000. 11. Construction of a pumping station near Thakurpukur cancer Hospital on Charial extentsion. Estimated cost: Rs. 4,00,00,000. It appears imperative that many of the drainage channels need to be excavated up to their respective design cross sections. Additionally, there could be a need to widen the canals at some places, due to the additional expected water discharge load from the upcoming township projects like Rajarhat which is supposed to discharge partly in the Lower Bagjola Canal and partly into Kestopur Canal. However, the difficulty could be the acquiring of additional land by the side of the exisiting canals and an extra amount need to be spent if such a proposal is undertaken. The following details are provided: 7.3.1. Installation of a pump house of 25.50 m 3 /sec capacity at the out fail point of Ghushighata Outfall drainage efficiency will improve accruing the following benefits: 1. To allow the additional discharge coming in the SWF channel. 2. Drainage congestion of heavily populated urban areas will be eased. 3. As the pumps would be operated during tide lockage, chances of siltation would be reduced. 4. Lowering the FDL in SWF channel during tide lockage.
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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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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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Page 222 and 223: Executive Cost Summary of Recommend
Page 224 and 225: References Kanjilal (2005) “Sunde
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