You can start using a simple Ricardian Model of land rents, using the concept of Land Expectation Value (LEV) (Faustmann's formula). By estimating the land revenues obtained from exploitation of forests and comparing against the opportunity cost of not doing it. Also comparing this against the land rent of alternative land uses. You can take a look to Cacho et al. (2014) where we use the concept of land rents (including also in the conceptual specification the rent from non-market values), also can check publications by Robert Stavins, Andrew Plantinga and Ruben Lobowski. Here is abovementioned reference:
Cacho, O.J., S. Milne, R. Gonzalez, L. Tacconi. 2014. Benefits and costs of deforestation by smallholders: Implications for forest conservation and climate policy. Ecological Economics 107(6):321-332