Publications by authors named "P E Mellander"

The use of high-frequency water quality monitoring has increased over several decades. This has mostly been motivated by curiosity-driven research and has significantly improved our understanding of hydrochemical processes. Despite these scientific successes and the growth in sensor technology, the large-scale uptake of high-frequency water quality monitoring by water managers is hampered by a lack of comprehensive practical guidelines.

View Article and Find Full Text PDF

Unlabelled: Diffuse pollution, globally affecting water quality by delivery of sediment, nutrients, pathogens and agro-chemicals from farmland, often has dominant flowpaths connecting to discrete channel delivery points, where field-edge mitigation can be optimally targeted. Accurate representation of field convergent flow paths (CFPs) can inform decisions on riparian mitigation planning. For three fields in Wexford, Ireland, we combined literature, catchment data, field-survey and spatial data methods to derive sediment and P exports (7.

View Article and Find Full Text PDF

Climate change is likely to exacerbate land to water phosphorus (P) transfers, causing a degradation of water quality in freshwater bodies in Northwestern Europe. Planning for mitigation measures requires an understanding of P loss processes under such conditions. This study assesses how climate induced changes to hydrology will likely influence the P transfer continuum in six contrasting river catchments using Irish national observatories as exemplars.

View Article and Find Full Text PDF
Article Synopsis
  • - The study investigates the transferability of a Bayesian Belief Network (BBN) model designed to simulate monthly stream phosphorus concentrations, applying it to three different catchments with varying hydrology and land use to assess its predictive capabilities.
  • - The original BBN model showed strong performance in accurately simulating phosphorus and flow values in poorly and moderately drained catchments, but struggled in groundwater-dominated areas; modifications, like incorporating additional groundwater inputs, led to improved model accuracy.
  • - A sensitivity analysis allowed the identification of unnecessary variables, ultimately resulting in an enhanced BBN model that demonstrates better generalization and application across diverse catchments.
View Article and Find Full Text PDF

A modelling framework was developed to facilitate a probabilistic assessment of health risks posed by pesticide exposure via drinking water due to runoff, with the inclusion of influential site conditions and in-stream processes. A Monte-Carlo based approach was utilised to account for the inherent variability in pesticide and population properties, as well as site and climatic conditions. The framework presented in this study was developed with an ability to integrate different data sources and adapt the model for various scenarios and locations to meet the users' needs.

View Article and Find Full Text PDF