Plantation avalanche protection in Oisans, Ferrand Valley, Ecrins NP, Oisans, Northern Alps, France

plantation (agronomy) ecological engineering mountain valley snow avalanche winter protection tourism isère 38 summit tree national park ecrins national park blue sky january lane plantations (agronomy) planting (agronomy) ecological engineerings mountains valleys dales dale dells dell vale vales snow covered snowy avalanches protections sightseeing sightseeings tourisms summits peak (summit) peaks (summit) mountain peak mountain peaks mountainpeak mountain top mountain tops mountaintop mountaintops trees national parks sensitive natural areas blue skies good weather nice weather lanes propagation (agronomy) agronomy natural resources use environment management biodiversity management environment area landform earth's crust solid precipitation precipitation 2 meteorological phenomenon atmosphere natural hazard hazard temperate season seasons journey leisure dauphiné province rhône alpes auvergne rhône alpes france european union europe woody plant morphology (botany) morphology organism environment protection ecrins (massif) alps (range) world mountain and summit sky enumeration