Characterising N and P concentration patterns in farmyard-connected drainage ditches and the potential of leaky dams as an in-ditch mitigation option

Demi Ryan

doi:10.1016/j.agwat.2026.110655

Characterising N and P concentration patterns in farmyard-connected drainage ditches and the potential of leaky dams as an in-ditch mitigation option

2026-07-23

0

OA

AI

D

Demi Ryan *

R

Russell Adams

A

Alessandro Tavano

P

Patricia Oliveira Antunes

O

Owen Fenton

K

Karen Daly

DOI：10.1016/j.agwat.2026.110655

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Abstract

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• Farmyard connected drainage ditches are “high risk loss pathways” for farm N and P. • Grab water samples showed temporal and spatial variability of concentrations. • Local hydrological connectivity and ditch configuration were influencing factors. • Bespoke wooden leaky dams were installed to slow flow and attenuate nutrients. • Downstream nutrients were reduced and P-rich sediment accumulated behind dams.

Keywords:

Water quality

Drains

Pathway interception

Farmyards

Sediment trap

Nature-based solutions

NBS

Characterising N and P concentration patterns in farmyard-connected drainage ditches and the potential of leaky dams as an in-ditch mitigation option

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