Pathways to environmental risk reduction in steep‐land forestryDuncan Harrison, Tim Payn, Chris Phillips, Les Basher, Marie Heaphy

Re-cap 3.2b: minimising and mitigating steep land harvest impacts

Re-cap 3.2b: minimising and mitigating steep land harvest impacts • Inform policy relating to sustainability credentials of our

planted forests. • Improve forest design and planning practises • Design and test alternative management practices • Assess the impacts on the environment, ensure social

acceptability

Pathways 2015 – 2016

• Planting of a trial.• Organise a meeting for all stakeholders with an interests

in erosion and debris flow modelling and risk analysis.• Continue to champion the importance of a cohesive

national collection data of erosion and debris flows data.• Gather data for the calibration and validation for the

SoSlope model for NZ conditions

Alternative Management Practises

• Trials– Williows & Pine

• Designed • Planted • Spot spray• Aerial release completed

– Root reinforcement (radiata, manuka)

Stakeholder Engagement & Informing policy • Developing good practice for steepland forestry

workshop – Debris flows fact sheet.

• GDC environmental impacts of forestry report• Marlborough Mitigating fine sediment • Continue support for development of NES-PF

Ensuring Licence to Operate

• Paper - Dunningham. D., Harrison. D., Garrett. G. L., 2016. Social learning towards addressing the ill-structured problem of steepland forestry in New Zealand.EnvironmentalScience and policy

Goal Reason Constraints determined by stakeholders

Actions

Identification of effective mitigation measures.

To minimise the impact of debris flow events, particularly off-site. To minimise the impact of erosion on freshwater values and soil quality.

Lack of knowledge on erosion and debris flow mitigation measures and their performance.

National standardised methods for the collection and storage of mitigation measure designs, location and performance.

Future Pathways

• Alternative Management Practises– Measurement of trial

• Survival rate • Root collar • LiDar & aerial images

Future Pathways: Managing Risk

• Managing Risk• Debris mitigation• Best management practises for debris flow

mitigation manual

• SlideForNet/SlideForMap/SoSlope– NZ data for further model development, calibration

& validation

Future Pathways: data collection

• Possible creation of web based application to capture national erosion and debris flow data

http://research.nzfoa.org.nz/www.gcff.nz

Duncan HarrisonGeo-Spatial Scientist

duncan.harrison@scionresearch.com

13th May 2016

• Peer Reviewed Articles– Dunningham. D., Harrison. D., Garrett. G. L., 2016. Social learning towards addressing the ill-

structured problem of steepland forestry in New Zealand. Environmental Science and policy (Draft)

• Popular Articles– Payn TW, Phillips CJ, Basher L, Baillie BR, Garrett LG, Harrison DR, Heaphy MJ, Marden M. 2015.

Improving management of post-harvest risks in steepland plantations. New Zealand Journal of Forestry, 60(2), 3-6.

– Basher, L., Harrison, D., Phillips, C., Marden, M., 2015. What do we need for a risk management approach to steepland plantation forests in erodible terrain? New Zealand Journal Forestry 60, 7-10

– Phillips, CJ., Marden, M., Basher, L., 2015. Forests and erosion protection – getting to the root of the matter. New Zealand Journal of Forestry 60, 11-15.

– Baillie, BR, Rolando, CA. (2015). Long-term management of streams in planted forest steeplands. New Zealand Journal of Forestry, 60(2),21-24.

• Presentations