Sediment tsunami choking Christchurch streams

Audio, Radio New Zealand

A freshwater biologist says a tsunami of sediment and sand caused by the Canterbury earthquakes is choking the city's riverbeds and killing aquatic life.

Latest quake throws up five times more silt than September

Audio, Radio New Zealand

The amount of silt and sand collected following the Christchurch earthquake is now almost five times more than September's quake.