Quantifying nutrient dynamics through a lowland karst network

Abstract

In this thesis, hydrochemical methods are used in combination with hydrologic analysis to characterise and model the Gort Lowlands catchment in western Galway, specifically focussing on an interlinked chain of ephemeral lakes (known as turloughs). The Gort Lowlands is a relatively unique karstic system, both hydrologically and hydrochemically, and lies within the pure Carboniferous lowlands of western Ireland. the primary source of water to the catchment is derived from the largely impermeable Devonian sandstone catchment found on the Slieve Aughty Mountains. Three rivers draining from these mountains (the Owenshree, Ballycahalan and Beagh Rivers) discharge down into the karst lowlands allogenically, imparting the catchment with a distinct hydrochemical flux.