But he said that would cause extra water to flow through Newhaven, increasing erosion to river defences.

BBC: Flood plans to protect 1,500 Sussex homes

One problem that's constant is erosion of the sandy river banks and cliffs.

BBC: Stour and Orwell estuaries five year management plan

Soil erosion in the catchment areas leads to the silting of river beds, which soon offsets the protective value of embankments.

ECONOMIST: From the archive

They live in communities that at one time or another were safe, but have become dangerous or risky to live in over time because of human progressions that have spread the erosion processes of the coastal wetlands, i.e. refineries, river navigation, etc.

CNN: Your e-mails: Balancing nature, commerce

The project is on a tributary of the Ausable River in the Essex County town of Jay, where an undersized culvert has caused severe erosion.

WSJ: Towns, ecologists seek climate-friendly culverts

The enduring erosion of the coastline, caused by bad water management all the way from the upper Mississippi River and the coastal canals, erodes the marshes and leaves coastal Louisiana exposed to the full brunt of future hurricanes.

CNN: Today's New Orleans a tale of two cities