The River Ythan has a length of 60 kilometres (37 mi) and a catchment area of 680 km2 (260 sq mi).[1] As figures of the discharge, 6 m3 (210 cu ft)/s are given[3] or 7.2 m3 (250 cu ft)/s.[4]
Nitrate Vulnerable Zone
The Scottish Government has designated the River Ythan catchment as a Nitrate Vulnerable Zone following concerns about the spread of algal mats in the river during the 1990s. The resulting restrictions on the use of fertilisers in the catchment were criticised by many farmers, 90% of the land in the catchment area is used for agriculture. However, the designation and subsequent actions to solve the issue under the European Union's LIFE Fund's Ythan Project have led to improvements in water quality as an increasing number of farmers used techniques such as the creation of buffer strips between their fields and the river and nutrient budgeting. Both the increase in agri-environment schemes in the area and the individual river restoration work undertaken under the auspices of the Ythan Project have led to an increase in wildlife habitat in the Ythan's catchment.[5]
Etymology
The name Ythan may be derived from a Brittonic source, cognate with Old Welsheith meaning "gorse" (Welsheithin)[6] or else, from an early *Iectona meaning "talkative one" (Welsh iaith; c.f. River Ithon).[7]