'As rainfall becomes more eratic, we must invest in water storage'

Dr Colin Chartres, the director general of the International Water Management Institute and one of the world's leading water experts, will warn this week that increasingly erratic rainfall related to climate change poses a huge threat to the world's economic growth and food security.

In Stockholm's World Water Week, Dr Chartres will call for an urgent overhaul of water governance, including investment in all storage options – from large dams through to ponds and tanks.