Q.3
ICAR JRF 2024Shift 1 MCQ (Single Correct) +4 −1
In raceways, the ideal bottom slope for construction of ponds is
  • Bottom Slope of Flow-Through Raceways:
  • In linear flow-through fish raceways (used for rainbow trout and channel catfish), the floor is constructed with an intentional longitudinal bottom slope of $1\% - 2\%$ ($1-2\text{ m}$ fall per $100\text{ m}$ length).
  • This gradient generates a self-cleaning hydraulic flow velocity that transports settled solid feces toward the downstream waste collector without requiring mechanical scraping.
  • Correct Option: Option 2 (1-2%).
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