Somasila is on the Penna in the Nellore region. Kandaleru Reservoir is a key component of the Telugu Ganga system and is connected by a link canal from Somasila. Official Nellore material also describes the scheme's interstate drinking-water dimension for Chennai. The examination challenge is to keep the natural river, reservoir, transfer canal and distant beneficiary separate. If a question asks 'Somasila Dam is on which river?', answer Penna. If it asks which reservoir is linked to Telugu Ganga's Chennai supply route, Kandaleru is relevant.

A linked reservoir can receive water from several components of a network over time. The name 'Telugu Ganga' is a project label, not evidence of a natural Ganga river flowing through AP. Likewise, Kandaleru is a reservoir and associated local stream name in the network, not the main Krishna river itself. Scheme descriptions may use flood flows from different basins and quote design allocations that differ from actual annual delivery.

For a blank-map exercise, draw Srisailam in the Krishna system; draw a transfer arrow through the dry southern interior; place Somasila on Penna; then show the Somasila-Kandaleru link and an onward drinking-water route. Use arrows for constructed movement and solid blue lines for natural drainage. This diagram is much more dependable than remembering four names without their roles.

Worked map reasoning

To explain Telugu Ganga, start with the Penna-side Somasila and Kandaleru reservoirs and trace the conveyance toward the south. Then contrast natural Penna flow with stored and transferred supply. A reservoir name, a canal name and a destination city each answer a different part of the water-path question. Sketching the sequence also helps distinguish the project from a single dam or a newly named river.

Active recall: close the book, place the named river or region on a blank map, and explain one likely exam confusion in your own words.