Water in New Zealand and are of varying types and origins. Many of the lakes in the central North Island area are volcanic crater lakes, while the majority of the lakes near the Southern Alps were carved by glaciers. Hydroelectric reservoirs are common in South Canterbury, Central Otago and along the Waikato River. Over 180,000 kilometres of rivers has been mapped in New Zealand, the longest being the Waikato River with a length of 425 kilometres and the largest river by volume is the Clutha River with a mean discharge of 533 cubic metres per second. New Zealand has many notable waterfalls, some of
Agriculture in New Zealand the recovered wild animals. In 2005, there were 264 pig farms with a total area of 12,831 hectares. There were also 855 mixed livestock farms and 633 other livestock farms, with areas of 178 and 18,000 hectares, respectively. The 50,000 tonnes of pork produced in 2007 was supplemented by 40,000 tonnes of imported pork products to meet domestic demand. 14.7 million chickens were raised for meat in 2007, with 145 tonnes of chicken meat produced. No other poultry is raised in significant numbers in New Zealand. Approximately 3.1 million laying hens are kept, producing 900 million eggs in 2006. Goats