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Forest management relies on the evaluation of silviculture practices. Theincrease in natural risk due to climate change makes it necessary to considerevaluation criteria that take natural risk into account. Risk integration inexisting software requires advanced programming skills.We propose auser-friendly software to simulate even-aged and monospecific forest at thestand level, in order to evaluate and optimize forest management. The softwaregives the possibility to run management scenarii with or without consideringthe impact of natural risk. The control variables are the dates and rates ofthinning and the cutting age.The risk model is based on a Poisson processus.The Faustmann approach, including tree damage risk, is used to evaluate futurebenefits, economic or ecosystem services. It relies on the calculation ofexpected values, for which a dedicated mathematical development has been done.The optimized criteria used to evaluate the various scenarii are the Faustmannvalue and the Averaged yield value.We illustrate the approach and the softwareon two case studies: economic optimization of a beech stand and carbonsequestration optimization of a pine stand.Software interface makes it easy forusers to write their own (growth-tree damage-economic) models without advancedprogramming skills. The possibility to run management scenarii with/withoutconsidering the impact of natural risk may contribute improving silvicultureguidelines and adapting them to climate change. We propose future lines ofresearch and improvement.

EvaSylv: A user-friendly software to evaluate forestry scenarii including natural risk