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wiki:mapping_assessment [2018/03/20 15:12]
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wiki:mapping_assessment [2018/03/20 15:24] (current)
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 === ES Spatial Analysis in the AlpES Project === === ES Spatial Analysis in the AlpES Project ===
  
-[[:​wiki:​grassland_biomass|Biomass production]] for livestock uses is an ES that strictly depends on local climate and biophysical parameters. Either these spatial data are collected from local institutions or indirectly obtained from remote sensing (RM), they can be used to estimate potential productivity of pastures and grasslands. In the [[wiki:​alpes|AlpES project]], statistical models are applied to quantify kg of production in dry matter per hectare, depending on the length of the growing season. The growing season is a typical proxy used to define the number of vegetation days i.e. the days in which the temperature is sufficiently high to induce biomass accumulation through synthesis of new plant tissues. For fodder production the temperature threshold was set to 5° C. Graph 1 reports the statistical models used to estimate biomass production. These models can be implemented by using simple map algebra tools, usually available in any GIS software, like QGIS and ArcGIS. A vigor factor (VF) has been assigned to each land cover as local productivity is assumed to be different depending on the specific land cover class: for example, alpine pastures have clearly higher biomass productivity compared to moors and heathland. Consequently,​ different growth curves have been chosen to estimate biomass growth based on the raster map that displays the number of vegetation days per cell.+[[:​wiki:​grassland_biomass|Biomass production]] for livestock uses is an ES that strictly depends on local climate and biophysical parameters. Either these spatial data are collected from local institutions or indirectly obtained from [[wiki:​remote_sensing|remote sensing]] (RM), they can be used to estimate potential productivity of pastures and grasslands. In the [[wiki:​alpes|AlpES project]], statistical models are applied to quantify kg of production in dry matter per hectare, depending on the length of the growing season. The growing season is a typical proxy used to define the number of vegetation days i.e. the days in which the temperature is sufficiently high to induce biomass accumulation through synthesis of new plant tissues. For fodder production the temperature threshold was set to 5° C. Graph 1 reports the statistical models used to estimate biomass production. These models can be implemented by using simple map algebra tools, usually available in any GIS software, like QGIS and ArcGIS. A vigor factor (VF) has been assigned to each land cover as local productivity is assumed to be different depending on the specific land cover class: for example, alpine pastures have clearly higher biomass productivity compared to moors and heathland. Consequently,​ different growth curves have been chosen to estimate biomass growth based on the raster map that displays the number of vegetation days per cell.
  
 {{:​wiki:​biomass_productivity_equations.jpg?​700}} {{:​wiki:​biomass_productivity_equations.jpg?​700}}
wiki/mapping_assessment.txt · Last modified: 2018/03/20 15:24 by cgiuppo