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Report, 2020

Manual for constructing water protection structures at ditch network maintenance sites and for water retention in forests

Finer, Leena; Härkönen, Laura; Jämsén, Juha; Joensuu, Samuli; Leinonen, Antti; Andersson, Elisabet; Ågren, Anneli; Čiuldienė, Dovilé; Libiete, Zane; Lomander, Anja; Pierzgalski, Edward; Ring, Eva; Sikström, Ulf


Ditch network maintenance (DNM) is carried out in order to sustain or increase tree growth. DNM includes operations aimed at improving drainage when a high groundwater level impairs tree growth. DNM should be financially justifiable and its harmful impacts on water quality should be minimized. Water protection should be considered when the suitability of DNM is assessed. In the present manual, technical instructions and materials required for constructing water protection structures are presented. The structures in question are fully described in the report “Good practices for ditch network maintenance to protect water quality in the Baltic Sea Region” (Finér et al. 2018). The purpose of these water protection structures is to reduce the transport of suspended solids (SS), nitrogen (N) and phosphorus (P) to downstream watercourses during and after DNM on forest land. In addition to the water protection structures used in DNM, examples of structures used to increase water retention in forest landscapes are briefly presented in the manual. It should be emphasized that the need for retaining water in forests is expected to increase due to climate change.

Published in

Natural resources and bioeconomy studies
2020, number: 66
eISBN: 978-952-380-045-8
Publisher: Natural Resources Institute Finland (Luke)

Authors' information

Finer, Leena
Natural Resources Institute Finland (Luke)
Härkönen, Laura
Finnish Environment Institute (SYKE)
Jämsén, Juha
Finnish Forest Centre
Joensuu, Samuli
Leinonen, Antti
Finnish Forest Centre
Andersson, Elisabet
Swedish Forest Agency
Swedish University of Agricultural Sciences, Department of Forest Ecology and Management
Čiuldienė, Dovilé
Lithuanian Research Centre for Agriculture & Forestry
Libiete, Zane
Latvian State Forest Research Institute "Silava"
Lomander, Anja
Swedish Forest Agency
Pierzgalski, Edward
Forest Research Institute (IBL)
Ring, Eva
Forestry Research Institute of Sweden, Skogforsk
Sikström, Ulf
Forestry Research Institute of Sweden, Skogforsk

UKÄ Subject classification

Water Engineering
Soil Science
Forest Science

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