ASSINGNMENT 1

WRE 435: HYDRAULIC STRUCTURES

ASSINGNMENT on

“TEESTA BARRAGE AT DALIA”

Submitted by: Submitted to:

NAME: Abir Mohammad Dr. Md. Ataur Rahman

ID No.: 201116017

Department of Water Resources Engineering, BUET.

LOCATION

Teesta Barrage

PHOTOS

INFORMATION & BASIC FEATURES

Largest irrigation project in Bangladesh.Designed jointly by BWDB & BUET.Construction started at 1979, finished at 1997-98.Spreads over 7 districts.615m long concrete structure.Total 44 radial gates.Discharge capacity 12,750 cusec .Has a 110m long Canal Head Regulator to control flow of water.A 610m long flood bypass for release of flood water.A 2,470m long closure dam to divert flow through the barrage.A silt trap to control entry of sediment in the canal.A flood embankment of about 80 km to provide flood protection.Gross benefited area 750,000 ha.

BENEFITS & PROBLEMS

BENEFITS: Increase of cropping intensity & production. Ample opportunities of pisciculture & duck farming. Improved communication to remote areas. Decrease of dependency of rainfall. Improved living condition. Sanctuary for migratory birds.

PROBLEMS & DEFECTS: Insufficient flow of water through Teesta. Conveyance loss through canals. Loss of lands for some farmers. Insufficient dredging. Poor condition of field outlets. Long distance between canals. Irrigation water unavailable in time.