Freshwater Umbrella Research 2004-7

WP 2: Nitrogen as a nutrient

Task 2.2 — Analysis of existing datasets (deposition, soils, land-cover, topography) to determine relationships between N leaching, N limitation and landscape-scale predictors

Recent publications arising from the NERC GANE programme have shown that landscape scale datasets may be used to predict N limitation in surface waters where N deposition is a major source of N (Maberly et al., 2002). This Task will attempt to upscale this approach to the national level using existing critical loads databases of water chemistry, soils and land-cover for over 2000 water bodies. The work will include GIS based characterisation of catchment slope and multivariate statistical analysis of diverse datasets.