Prakasam Barrage at Vijayawada diverts Krishna water into the delta canal system. APWRIMS associates it with the NTR district in the current table. An older Krishna district portal may still describe the structure as being in Krishna district because that text predates the 2022 division. The geographic river and city did not move.

A barrage has a different storage role from Srisailam Reservoir. In an MCQ, do not transfer the name Prakasam to Prakasam district automatically; this barrage is at Vijayawada.

Worked example: Prakasam Barrage is on the Krishna at Vijayawada and supports delta diversion. Distinguish the city anchor from the Krishna district name: current Vijayawada belongs to NTR district after the 2022 division. The river and barrage have not moved when the administrative label changed. A wrong option may exploit that older district association; use the current district map only when district jurisdiction is actually asked.

Active recall: Locate the named river or project on the relevant map, name its function, and state which facts need a dated source.