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Phosphorus mobilisation with sediment and colloids through drained and undrained grasslands - PE0120

Description
Phosphorus (P) and sediment/colloids both contribute to problems of water quality, in terms of eutrophication (for P) and silting of river beds and salmon spawning ground (for sediment/colloids). There is particular value in studying them together because P has a strong affinity for attaching to, and being transported with, sediment/colloids. This project focuses on P and sediment/colloid losses from grasslands. The objective is to provide mechanistic and fundamental knowledge that contributes to the Defra P programme through adopting a multidisciplinary team approach focussed around three platform sites. The team is led by IGER but also brings in new researchers to the Defra programme and does include scientists from outside the UK. Specifically, the project will contribute fundamental knowledge to help budget losses, define new techniques for identification of colloids and sediment, improve mechanistic understanding of sediment, colloid and P transport and contribute to new models for understanding P transport through grassland soils.
Objective
1. To determine the dynamics and mass balances of sheet erosion (with P and C attached), from drained and undrained grasslands.

2. To develop new technologies to separate and fractionate colloidal material in runoff and drainage from grassland and conduct fractogram and P species profiles during event hydrographs.

3. To undertake inductive manipulative tracing studies on small plots and catchments, that contribute new understandings of water, P, sediment/colloids and C transfer linkages/relationships.

4. To develop a mechanistic model of colloidal P transfers and delivery through drained soils that can be used as a research tool.
Project Documents
• Final Report : Phosphorus mobilisation with sediment and colloids through drained and undrained grasslands   (172k)
• Final Report - Annex : Defra Project PE0120 – Project Title: Phosphorus mobilisation with sediment and colloids through drained and undrained grasslands (Appendix to Final Report) - APPENDIX 1 Publication   (132k)
• Final Report - Annex : Defra Project PE0120 – Project Title: Phosphorus mobilisation with sediment and colloids through drained and undrained grasslands (Final Report)   (1911k)
Time-Scale and Cost
From: 2005

To: 2008

Cost: £885,908
Contractor / Funded Organisations
North Wyke Research, Institute of Grassland and Environment Research (IGER)
Keywords
Drainage              
Environmental Protection              
Erosion              
Eutrophication              
Grassland              
Modelling              
Phosphorus              
Pollution              
Soil              
Water Pollution              
Fields of Study
Fertilisers and Nitrate Pollution