<P> This is a list of the longest rivers in New Zealand, and some other prominent rivers, ordered by length . </P> <P> South Island rivers are marked "SI", and North Island rivers "NI". </P> <Table> <Tr> <Th> Rank </Th> <Th> Name </Th> <Th> Island </Th> <Th> Length (km) </Th> <Th> Length (mi) </Th> <Th> Source </Th> <Th> Mouth </Th> </Tr> <Tr> <Td> </Td> <Td> Waikato </Td> <Td> North </Td> <Td> 425 </Td> <Td> 264 </Td> </Tr> <Tr> <Td> </Td> <Td> Clutha / Matau </Td> <Td> South </Td> <Td> 322 </Td> <Td> 200 </Td> </Tr> <Tr> <Td> </Td> <Td> Whanganui </Td> <Td> North </Td> <Td> 290 </Td> <Td> 180 </Td> </Tr> <Tr> <Td> </Td> <Td> Taieri </Td> <Td> South </Td> <Td> 288 </Td> <Td> 179 </Td> </Tr> <Tr> <Td> 5 </Td> <Td> Rangitikei </Td> <Td> North </Td> <Td> 241 </Td> <Td> 150 </Td> </Tr> <Tr> <Td> 6 </Td> <Td> Mataura </Td> <Td> South </Td> <Td> 240 </Td> <Td> 149 </Td> </Tr> <Tr> <Td> 7 </Td> <Td> Waiau (Southland) </Td> <Td> South </Td> <Td> 217 </Td> <Td> 135 </Td> </Tr> <Tr> <Td> 8 </Td> <Td> Clarence </Td> <Td> South </Td> <Td> 209 </Td> <Td> 130 </Td> </Tr> <Tr> <Td> 9 </Td> <Td> Waitaki </Td> <Td> South </Td> <Td> 209 </Td> <Td> 130 </Td> </Tr> <Tr> <Td> 10 </Td> <Td> Oreti </Td> <Td> South </Td> <Td> 203 </Td> <Td> 126 </Td> </Tr> <Tr> <Td> 11 </Td> <Td> Rangitaiki </Td> <Td> North </Td> <Td> 193 </Td> <Td> 120 </Td> </Tr> <Tr> <Td> 12 </Td> <Td> Manawatu </Td> <Td> North </Td> <Td> 182 </Td> <Td> 113 </Td> </Tr> <Tr> <Td> 13 </Td> <Td> Buller / Kawatiti </Td> <Td> South </Td> <Td> 177 </Td> <Td> 110 </Td> </Tr> <Tr> <Td> 14 </Td> <Td> Waihou </Td> <Td> North </Td> <Td> 175 </Td> <Td> 109 </Td> </Tr> <Tr> <Td> 15 </Td> <Td> Mohaka </Td> <Td> North </Td> <Td> 172 </Td> <Td> 107 </Td> </Tr> <Tr> <Td> 16 </Td> <Td> Wairau </Td> <Td> South </Td> <Td> 169 </Td> <Td> 105 </Td> </Tr> <Tr> <Td> 17 </Td> <Td> Whangaehu </Td> <Td> North </Td> <Td> 161 </Td> <Td> 100 </Td> </Tr> <Tr> <Td> 18 </Td> <Td> Waimakariri </Td> <Td> South </Td> <Td> 161 </Td> <Td> 100 </Td> </Tr> <Tr> <Td> 19 </Td> <Td> Mokau </Td> <Td> North </Td> <Td> 158 </Td> <Td> 98 </Td> </Tr> <Tr> <Td> 20 </Td> <Td> Ngaruroro </Td> <Td> North </Td> <Td> 154 </Td> <Td> 96 </Td> </Tr> </Table> <Tr> <Th> Rank </Th> <Th> Name </Th> <Th> Island </Th> <Th> Length (km) </Th> <Th> Length (mi) </Th> <Th> Source </Th> <Th> Mouth </Th> </Tr>

What is the second longest river in new zealand
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