Cusec is a measure of flow rate and is informal shorthand for "cubic feet per second"(28.317 litres per second).

Cusecs candidate
City to Get Less Water from KRS: Inflow from Cauvery to Reservoir Has Come Down to 1,143 Cusecs per Day
Pakistan - Riverine Flood Situation Graph (Cusecs as on 31 July 2015 11:00 a.m.)
Pong Dam floodgates open after 13 years: about 33,000 cusecs of water released
6,300 cusecs water from Narmada diverted to farmers
Delhi BJP asks Haryana to release 381 cusecs of water
Officials get ready for super flood at Guddu next month
Characteristics of Sodium Pentachlorophenate used against Australorbis glabratus in Puerto Rico.
The hydrological effects of urbanisation in the Canon's Brook catchment, Harlow New Town, Essex [microform] /
River discharge measurement by the rising float technique