Which New Zealand river has the highest average water discharge rate, draining Lakes Hawea, Wanaka, and Wakatipu?
Answer and explanation
Correct answer: D. The Clutha River (Mata-Au)
- Step 1: The Clutha / Mata-Au is 338 km long and drains a vast alpine catchment in Central Otago. Step 2. It carries the largest volume of water and is dammed for hydroelectric power at Roxburgh and Clyde. Answer: The Clutha River (Mata-Au). Why not the others: Waikato is longer (425 km), but Clutha carries greater water volume.
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