The dark brown area shows the surface water runoff from the recent floods. It happens when the soil is so saturated excess water from rain flows over the land.
The recent flooding has caused an unprecedented number of sinkholes to appear in roads and near people's homes. Martin Stew investigates.
The 600-metre aqua-dam was pumped full of flood water on Friday to protect 200 homes.
Many householders have started to empty their homes and look for temporary accommodation.