Rivers and Lakes Brochure rttr Rain is the raw material of rivers, streams and lakes. It is estimated that about 30 per cent of the rain that falls on land finds its way into rivers. Of the rest some seeps through the soil to form underground lakes, some is absorbed by plants and some evaporates. Rivers are one of the main agents which have shaped he landscape in the past, and are continuing to shape it today.
Most rivers have their sources in hills and mountains which are areas of high rainfall.
Some of these are among the largest rivers in the country. This directive is very important because its sets quality standards for fresh water. Fresh water fish can only live in high quality, clean fresh water. There are 750 miles of rivers in County Cork. Most major rivers in County Cork run from west to east.