Freshwater Umbrella Research 2004-7

WP 3: Nitrate leaching

Task 3.3 — Expansion of dual isotope work to other sites

Following method development at the Afon Gwy in Year 1 and successful characterisation of leached nitrate sources, the dual isotope sampling approach will be expanded to three more sites in Year 2 (suggested from Allt a'Mharcaidh, Lochnagar, Scoat Tarn, River Etherow, Llyn Llagi). At these sites, the fieldwork programme will entail monthly sampling for water chemistry and dual isotope analysis, plus quarterly sampling for bulk deposition and soil waters (3 points per catchment). Dual isotope analysis will be performed at BGS Keyworth.