Can agri-environment initiatives control sediment loss in the context of extreme winter rainfall?

A - Papers appearing in refereed journals

Pulley, S. and Collins, A. L. 2021. Can agri-environment initiatives control sediment loss in the context of extreme winter rainfall? Journal of Cleaner Production. 311, p. 127593. https://doi.org/10.1016/j.jclepro.2021.127593

AuthorsPulley, S. and Collins, A. L.
Abstract

Soil erosion and sediment losses are likely to increase with projected climate change and increasing storm intensity, causing detrimental impacts to agriculture and the degradation of aquatic ecosystems. Agri-environment
initiatives aim to mitigate these losses through farmer engagement and incentivisation for best practice. There is,
however, limited evidence regarding the impacts of their delivery and their capacity to deliver resilience to extreme wet weather. As such, the aim of this study was to determine how fine-grained sediment provenance changes with flow condition in eight high priority English catchments targeted through a strategic agri-environment initiative and to compare the estimated sediment source proportions to the targeted advice being delivered to farmers. The provenance of fine-grained sediment was determined using sediment source finger-printing over low flow conditions and the winter of 2019–2020 which was characterised by severe flooding. Details on the advice delivered to farmers through the Catchment Sensitive Farming initiative were obtained from a delivery agency database and interviews with catchment officers. Dominant sediment sources varied considerably between catchments and were not easily predicted based upon their characteristics meaning that targeting on-farm advice effectively is challenging. Critically, however, changes in sediment sources rarely occurred with the extreme wet winter of 2019–2020. It is recommended that the greater availability of empirical catchment-specific evidence could significantly improve the delivery of such agri-environment initiatives. In the current absence of this evidence an assumption that riparian woodland is effective at preventing sediment losses
and the targeting of advice to sediment sources proportionally based upon the area of the catchment they cover may improve the benefits of such initiatives.

KeywordsAgri-environment ; Climate change ; Sediment sources; Catchment management; Sustainability; Farm management
Year of Publication2021
JournalJournal of Cleaner Production
Journal citation311, p. 127593
Digital Object Identifier (DOI)https://doi.org/10.1016/j.jclepro.2021.127593
Web address (URL)https://doi.org/10.1016/j.jclepro.2021.127593
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeS2N - Soil to Nutrition - Work package 3 (WP3) - Sustainable intensification - optimisation at multiple scales
Environment Agency project 19936 (Catchment Sensitive Farming programme)
Output statusPublished
Publication dates
Online27 May 2021
Publication process dates
Accepted18 May 2021
PublisherElsevier Sci Ltd
ISSN0959-6526

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