Appendix 5: Energy

Table 6: Existing hydro generation by catchment

Rank	Catchment name	Existing (GWh per annum)	% of GWh per annum
1	Waitaki	7,612	33.0%
2	Waikato	6,349	27.5%
3	Clutha	3,378	14.6%
4	Waiau (Southland)	3,180	13.8%
5	Wairoa (Hawke's Bay)	625	2.7%
6	Rangitaiki	540	2.3%
7	Taieri	425	1.8%
8	Rakaia	197	0.9%
9	Manawatu	166	0.7%
10	Takaka	140	0.6%
11	Patea	134	0.6%
12	Rangitata	118	0.5%
13	Wairau	59	0.3%
14	Taramakau	46	0.2%
15	Mokau	28	0.1%
16	Waitara	21	< 0.1%
17	Waiwhakaiho	20	< 0.1%
18	Wairoa (Northland)	13	< 0.1%
19	Whanganui	7	< 0.1%
20	Ruamahanga	4	< 0.1%
21	Mataura	4	< 0.1%
	Total	23,066	100%

Table 7: Potentially nationally important water bodies for existing energy generation

Table 8: Potentially nationally important water bodies for potential energy generation with a medium probability of proceeding by 2025

Table 9: Existing energy generation by geothermal field

Rank	Catchment name	Existing GWh per annum	Exceeds 230 GWh per annum
1	Wairakei	1,734	Yes
2	Ohaaki	820	Yes
3	Mokai	434	Yes
4	Rotokawa	221	No
5	Kawerau	118	No
6	Ngawha	71	No

Table 10: Potential energy generation by geothermal field with a medium probability of proceeding by 2025

Rank	Geothermal field name	Potential GWh per annum	Exceeds 230 GWh per annum
1	Kawerau	2,810	Yes
2	Rotokawa	2,390	Yes
3	Wairakei	1,430	Yes
4	Ngatamariki	1,104	Yes
5	Mokai	770	Yes
6	Tauhara	550	Yes
7	Mangakino	512	Yes
8	Ngawha	500	Yes
9	Rotoma	280	Yes
10	Tikitere-Taheke	80	No
11	Horohoro	70	No

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