Cyclone and Storm Surge - Iczmpwb.org

3.30
Respectively. The discharge of New Monikhali Khal is 44.16 cumecs (1559 cusecs) and that of Old
Monikhali Khal is 3.82 cumecs (134.88 cusecs), The Khals ultimately outfall into river Hooghly
through outfall sluices.
The Khals fall within Maheshtala Municipality and are carriers of drainage water of this area including
sewage compnsing domestic waste as well as discharge coming through Begore Khal carrying the
discharge of Municipal Corporation.
Both the chananels flow through densely populated area. As such the channels require to be lined
particularly the side slopes require to be renovated by protective works to avoid slips. New Monikhali
Khal requires immediate desiltation to accommodate the full supply of Begore Khal.
Churial Khal
Churial Khal system drains a total area of 164.98 sq.km. ( 63.70 sq.mls.) of which 141.65 sq.km.
(54.69 sq.mls.) is rural and 23.33 sq.km. (9.01 sq.mls.) is urban. The main Khal, with a length of
17.59 Kms. along Behala to Purba Barisha under Kolkata Municipal Corporation outfalls into river
Hooghly through a 5-vented outfall sluice of 28.32 cumecs (1000 cusecs) capacity at Churial
under Budge Budge Municipality. The diversion channel, with a length of 7.01 Kms. flowing from
Mouza Mithapukur to Pujali Notified Area drains into river Hooghly through a 10-vented sluice of
capacity 56.33 cumecs (1989 cusecs). Over and above, the system includes Churial Khal Extension
of length 1.996 Kms. from Behala Motilal Gupta Road to Purba Barisha at Joka, 15 nos. branch
canals of total length of 50.32 Km. and as many as 20 nos. of sub-branches. The system caters
drainage of areas falling under P.S. Budge Budge, Bishnupur, Maheshtala and Thakurpukur. Desilting
of the Khals is of urgent necessity to assure proper capacity of drainage channels and the
Khals require to be lined.
Keorapukur Khal
The Keorapukur Khal, with a length of about 32 Kms. and a total basin area of 38,83 sq.km, has two
directional outfalls, one into Diamond Harbour creek and the other into Tolly's Nullah near Kudghat.
Out of its total length, 7.5 Km stretch lies within Kolkata Metropolitan area which drains water of a
catchment area of about 30 sq. kms. at the northern end and outfalls-into Tolly's Nullah. This
channel serves the drainage requirement of Bakeswar, Keorapukur, Putiary areas which are totally
urbanised now. 10.9.2 The canal, being badly silted up and reduction of canal section is unable to
drain out the discharge of the catchment area. The encroachment on the banks of the canal poses
serious problem for execution of canal improvement works. The Keorapukur Drainagae Pumping