Defra - Department for Environment, Food and Rural Affairs.

Science Search

Science and Research Projects

Return to Science Search homepage   Return to Project List

Deposition and canopy interception of sub-micron particles and caesium-bearing simulated rain. - RP0117

The proposed research seeks to reduce current parameter uncertainies relating to deposition of both sub-micron aerosols and wet deposits to crop canopies as predicted by MAFF's SPADE model. A multivariate statisticel approach currently applied to CARE's existing data library on the dry deposition of supra-micron aerosols will be extended to dry, sub-micron aerosols and caesium-labelled simulated rainfall. The derivation of basic canopy parameters will allow multiple linear regression analysis to ascertain th dependency of deposition rates on canopy variables: the study will therefore encompass a generic approach to deposition parameter derivation which will ultimately reduce the need for experimental data collection.
1. To provide parameter values relating to a) dry depostion of sub-micron particles and b) wet deposition to crop canopies, for input to MAFF's SPADE model.Sub-micron dry deposition data will supplement and extend the existing library of depostion parameters for supra-micron particles derived at CARE for a variety of generic crop types. This library is now sufficiently extensive to facilitate multivariate statistical analysis for the interpolation of deposition parameters from general canopy characteristics. Addition of sub-micron deposition data will allow this approach to be applied to particles in the size range 0.1 -10 um and will ultimately reduce the need for experimental data collection.
Time-Scale and Cost
From: 1993

To: 1995

Cost: £97,460
Contractor / Funded Organisations
University - London