TY - JOUR A1 - Helliwell, R. C. A1 - Coull, M. C. A1 - Davies, J. J. L. A1 - Evans, C. D. A1 - Norris, D. A1 - Ferrier, R. C. A1 - Jenkins, A. A1 - Reynolds, B. T1 - The role of catchment characteristics in determining surface water nitrogen in four upland regions in the UK JO - Hydrol. Earth Syst. Sci. J1 - HESS VL - 11 IS - 1 SP - 356 EP - 371 Y1 - 2007/01/17 PB - Copernicus Publications SN - 1607-7938 UR - https://hess.copernicus.org/articles/11/356/2007/ L1 - https://hess.copernicus.org/articles/11/356/2007/hess-11-356-2007.pdf DO - 10.5194/hess-11-356-2007 ER -