How does the Manapouri power station works?

How does the Manapouri power station works?

http://patandpaulharvey.blogspot.com/2011/02/paradise-is-doubtful-sound-we-need-tag.html

Christmas travel plan with Erica, holiday plan, 2011

Destination options:
罗托鲁瓦(Rotorua)[Mud spa][Farm Tour - http://www.agrodome.co.nz]→汤加里罗国家公园(Tongariro National Park)→惠灵顿, Matamata, Tauranga[Golden beach],Napier(Wine tour)

Christchurch,→库克山国家公园(Mount Cook National Park)→蒂卡波(Tekapo)→瓦那卡(Wanaka)→箭镇(Arrow town)→皇后镇(Queenstown)—蒂阿瑙(Te Anau)[stay one day]→ Milford sound -> 丹尼丁(Dunedin)→阿卡罗阿(Akaroa - Akaroa is next to ChristChurch)


Travel plan:

Deluxe Lake Spa - http://www.polynesianspa.co.nz/polynesianspa/deluxe-lake-spa/

hawkes bay wine taste
http://www.hbscenictours.co.nz/wine_experience_tour.htm
http://www.hawkesbaynz.com/prinsys
http://www.baytours.co.nz/winerytours-option1.php

hawkes bay accommodation stay on the vineyard
http://www.clearviewestate.co.nz/accommodation/
http://www.tuki.co.nz/
http://www.blackbarn.com/property.asp?id=8 (Expensive)