KARANAKODAMTHODU

Preliminary Study Report

INTRODUCTION

MINOR IRRIGATION | ERNAKULAM

The Karanakodam thodu passes through Karanakodam,Palathuruthu , Rail Nagar and Elamkulam . The totallength of the Karanakodam thodu is 4.77Km withstarting width of 4m near at JLN Stadium,Kaloor. Theaverage width of thodu is 8.5m and the whole stretch isprotected with DR masonry. The width variationwere noted at various stretches with Apartment andbuilding plot compound walls are constructed abuttingthe thodu. Cross structures not having sufficientclearance for flow of water have been noticed. Manydrains are emptying into this thodu.

Karanamkodam thodu is a part ofChilavannoor canal and it starts fromwestern side of JLN Metro stationtraversing towards South and endsatElamkulam, where the water drains in toChilavannoor kayal. The parentChilavannoor Canal originate fromChilavannoor kayal, and terminates atChittoor Puzha , near Amritha Institute ofMedical Science(AIMS) Edappally . Earlierpeople depended this thodu to reachEdappally from Thripunithura and was usedfor the transportation of goods also. Thethodu was originally traversing through thestadium premises and was shifted to theboundary of the stadium during itsconstruction. Now this thodu isseenseparated into two at the Banerjeeroad near JLN Metro Station. The thodutowards north is Changadam poku thoduand towards south isKaranakodam thodu.

PRESENT SCENARIO

NEAR JLN METROSTATION AT CH 0 M

At the starting of the JLN metrostation from where theKaranakodam – thodu started, it isnoticed that the2 pipes from theother side of the Banerjee road areconnected to this thodu . Also utilityservice pipelines and cables areimproperly laid across it.The portionfrom JLN Metro station toKarnakodam stretch runs abuttingto the JLN Stadium compoundboundary after which it runsparallel to the stadium link road.The bridges and pipelinesconstructed without adequatevertical clearance across the thoducause obstruction to the smoothflow of water through the thodu. The Adimury thodu is joining to this near the Sreekrishna cateringbuilding at Stadium link road andsteel foot over bridge here needs tobe replaced as it is devoid of anyvertical clearance. The KWA ,KSEBand BSNL pipelines acrosstheculverts near Kent Apartmentand Skyline apartments arecrossing the thodu withoutsufficient clearance .

NEAR KENT APARTMENT AT CH :1205M AT CH :995M NEAR STADIUM LINK CULVERT NEAR SKYLINE APARTMENT CH: 1598M

The thodu crosses the ThammanamPulleppady road at Ch 2039m andflows towards Railway Marshallingyard. A connection thodu toKaranakodam is seen completelyblocked at the downstream of thisbridge.

The culverts in the V.V.Road (ch. 468m)and St.Sebastian Road(ch. 4155m) havevery low vertical clearance and anarrower water way and need to bereconstructed .The area has beensubjected to flooding during heavy rains.There is an iron bridge at Ch 4408m at thedownstream of Railnagar area .Wasteaccumulation and presence of waterweeds have been noticed here whichcauses hindrances to the uninterruptedflow of water.The thodu crosses theSubhash Chandra Bose road (ch. 4650)and joins Chilavannoor Kayal.Thewaterway of this bridge is narrower andalso pillars of the KWA Pipeline in thisbridge coupled with the presence of waterweeds are obstructing the flow and thebridge has to be reconstructed .

The thodu has been included in the Operation Break Through 2020 andwas desilted. Now during the field visit, it has been noticed that Cochincorporation is carrying out cleaning in this thodu.

AT CH :2039 M

Near the railway marshalling yard,the thodu has been deviated alongthe boundary of the yard by theRailways .In this course along theRail nagar area, a railway bridgeis crossing the thodu and at thedownstream of the Railwaycrossing ,Puncha thodu is startingat Ch 3116m. There are twoculverts viz Panorama residencyculvert and Rail nagar No.1 culvertin this area. The thoduregains theoriginal course near Rail nagarmain bridge(ch. 3884) joining thethodu from Marshalling yard andproceeds southward to Chettichiraand finally drains to ChilavannoorKayal.Also at Ch 3986 m, at thesouth end of MarshallingYard,Puthen palam thodu startsfrom this and joins ChilavannoorKayal.

AT CH: 2982M AT CH :3986 M -NEAR SOUTHEND OF MARSHALLING YARD

AT CH: 4006 M-RAIL NAGAR AREA

AT CH :3394M NEAR PANORAMA RESIDENCY

CH: 4068M-V.V.ROAD AT CH 4155M -ST SEBASTIAN ROAD

AT CH :4408M-IRON FOOT BRIDGE

AT CH:4650M -SUBHASH CHANDRA BOSE ROAD

PROBLEMSIDENTIF IED

At the starting point (Ch 0m) near JLN Metro station, pipelines and cables obstructing free flowof water.Culvert at Ch 995 m at the junction of Adimurithodu without adequate vertical clearance.Servicelines across culverts at Ch 1205m(near Kent Apartments) ,Ch 1478m( near SkylineApartments), not having sufficient vertical clearance .Connection from Marshalling Yard (Ch 4006m )fully blocked.Culvert at Ch 4006m in V.V.Road not having adequate horizontal vent way and vertical clearanceand also service lines across culvert have so sufficient vertical clearance.Culvert at Ch 4155m in St.Sebastian Road not having adequate horizontal ventway and verticalclearanceand also service lines across culvert have so sufficient vertical clearance.Waste accumulation and water weeds beneath the Iron Foot bridgeat Ch 4408m .Culvert at Ch 4650m at Subhash Chandra Bose Road not having adequate horizontal ventway andvertical clearance.Pillars of KWA Pipe obstructing flow.

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7.8.

REMEDIAL MEASURES

a. Culvert at Adimuri thodu Junctionb. Culvert at V.V.Road c. Culvert at St.Sebastian Roadd. Bridge at Subhash Chandra bose Road.

A. LONG TERM MEASURES - STRUCTURES TO BERECONSTRUCTED.

B. SHORT TERM MEASURES

1.Starting point -Near Metro Station2.Culvert near Kent Apartment.3.Culvert near Sky line imperial apartment4.Culvert near Panorama Residency 5.Culvert at V.V.Road .6.Culvert at St. Sebastian road 7. Subhash Chandra Bose Road crossing.

A. Two trees which obstruct the smooth flow are to be cut,one near culvert at Ch 515m(NSSKarayogam Junction) ,another near Adimuri thodu junction at Ch 995m.Apart from this wastedeposit and water weeds beneath Iron bridge at Ch.4408 has to be removed. Also the treesnear the mouth of the Kayal have to be pruned for ensuring free flow of water.B. Service Lines to be replaced KWA Pipe lines and cables of KSEB and BSNL -

The periodical desilting of thodu and its connections ,providing cross structures with adequatehorizontal waterway and vertical clearance ,realignment of service lines with sufficient head room willhelp to ensure the uninterrupted flow through the thodu.