Step 1: Understanding the Concept:
The question asks to identify the specific source of water for the royal centre of the Vijayanagara capital, which was a well-planned enclosure with numerous palaces, audience halls, and temples.
Step 2: Detailed Explanation:
The rulers of Vijayanagara developed a sophisticated hydraulic system to manage water for both agricultural and urban needs.
The Hiriya canal was one of the most significant canals, drawing water from a dam across the Tungabhadra river. Its primary purpose was to irrigate the agricultural valleys.
The Kamalapuram tank, a large reservoir located just south of the royal centre, was a crucial part of the urban water supply. Archaeological evidence has clearly shown that channels were laid out from this tank to carry water into the royal centre. This water was used to supply various tanks, baths (like the Queen's Bath), and gardens within the elite enclosure.
The Lotus Tank is likely a reference to a smaller ornamental tank and was a recipient of water, not a primary source for the entire centre.
Step 3: Final Answer:
Water from the Kamalapuram tank was specifically channeled to supply the needs of the royal centre in Vijayanagara.