Lookup NU author(s): Dr Russell Adams,
Dr Paul Quinn
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
A model for simulating runoff pathways and waterquality fluxes has been developed using the minimum information requirement (MIR) approach. The model, the Catchment Runoff Attenuation Flux Tool (CRAFT), is applicableto mesoscale catchments and focusses primarily on hydrological pathways that mobilise nutrients. Hence CRAFT canbe used to investigate the impact of flow pathway management intervention strategies designed to reduce the loads ofnutrients into receiving watercourses. The model can helppolicy makers meet water quality targets and consider methods to obtain “good” ecological status.A case study of the 414 km2Frome catchment, Dorset,UK, has been described here as an application of CRAFTin order to highlight the above issues at the mesoscale. Themodel was primarily calibrated on 10-year records of weeklydata to reproduce the observed flows and nutrient (nitrate nitrogen – N; phosphorus – P) concentrations. Data from 2years with sub-daily monitoring at the same site were alsoanalysed. These data highlighted some additional signals inthe nutrient flux, particularly of soluble reactive phosphorus,which were not observable in the weekly data. This analysis has prompted the choice of using a daily time step as theminimum information requirement to simulate the processesobserved at the mesoscale, including the impact of uncertainty. A management intervention scenario was also run todemonstrate how the model can support catchment managersinvestigating how reducing the concentrations of N and P inthe various flow pathways. This mesoscale modelling toolcan help policy makers consider a range of strategies to meetthe European Union (EU) water quality targets for this typeof catchment.
Author(s): Adams R, Quinn PF, Bowes MJ
Publication type: Article
Publication status: Published
Journal: Hydrology and Earth System Sciences
Print publication date: 09/04/2015
Online publication date: 09/04/2015
Acceptance date: 09/03/2015
Date deposited: 11/07/2016
ISSN (print): 1027-5606
ISSN (electronic): 1607-7938
Publisher: Copernicus GmbH
Altmetrics provided by Altmetric