The canal-carrying capacity of Farakka is

The Feeder (canal) associated with the Farakka Barrage has a design/carrying capacity of about 40,000 cusecs. The Farakka Barrage project description explicitly states a feeder canal carrying capacity of 40,000 cusecs (≈1,135 cumec) and a length of about 38.38 km [1]. Central Water Commission documentation gives the feeder canal’s design discharge as roughly 1,132 m3/s, which converts to approximately 40,000 cubic feet per second, matching the stated capacity [2]. Independent project reports likewise record the feeder canal capacity as about 1,133 cumec (≈40,000 cusecs), confirming the 40,000 cusec figure for the canal-carrying capacity at Farakka.

Sources

1. [1] https://fbp.gov.in/aboutus.html
2. [2] https://cwc.gov.in/sites/default/files/vol-1reportcommitteeconductingjointdetailedtechnicalstudy.pdf