Differences

This shows you the differences between two versions of the page.

--- wiki:wood_removals [2018/07/17 15:47] – eurac
+++ wiki:wood_removals [2018/07/17 18:26] (current) – eurac
@@ Line 7: / Line 7: @@
 <font 14px/inherit;;inherit;;inherit>The procedure consists of two main parts:</font>
-  * <font 14px/inherit;;inherit;;inherit>**Calculation of the accessible forest areas (Step 1 and 2):** typically, commercial wood production occurs only on forests that are accessible and workable in terms of topographic conditions. Hence, in the following analysis only accessible and workable forest areas are included.</font>  * <font 14px/inherit;;inherit;;inherit>**Calculation of the amount of fuelwood produced in each LAU2 (Step 3 and 4**): The statistical data about the amount of felling is disaggregated at LAU2 level using results from part 1.</font>
+  * <font 14px/inherit;;inherit;;inherit>**Calculation of the accessible forest areas (Step 1 and 2):** typically, commercial wood production occurs only on forests that are accessible and workable in terms of topographic conditions. Hence, in the following analysis only accessible and workable forest areas are included.</font>
+  * <font 14px/inherit;;inherit;;inherit>**Calculation of the amount of fuelwood produced in each LAU2 (Step 3 and 4**): The statistical data about the amount of felling is disaggregated at LAU2 level using results from part 1.</font>
 ==== Input data ====
@@ Line 14: / Line 16: @@
   * <font 14px/inherit;;inherit;;inherit>**Forest roads: **open street map layer (OSM)</font>
-[[http://download.geofabrik.de/|Source: http://download.geofabrik.de/]]. The roads classified as “bridleway”, “service”, “track”, “track_grade1”, “track_grade2”, “track_grade3”, “track_grade4”, “track_grade5”, “unclassified” and “unknown” are used.
+Source: [[http://download.geofabrik.de/|http://download.geofabrik.de/]]. The roads classified as “bridleway”, “service”, “track”, “track_grade1”, “track_grade2”, “track_grade3”, “track_grade4”, “track_grade5”, “unclassified” and “unknown” are used.
   * **Forest**: High-resolution tree-cover-density layer
@@ Line 52: / Line 54: @@
 **<font 14px/inherit;;inherit;;inherit>//Statistical data//</font>**<font 14px/inherit;;inherit;;inherit>//://</font>
-  * Statistical data about roundwood production**: The amount of wood that is extracted from the forest. Source: Forest inventories of single countries **
+  * **Statistical data about roundwood production**: The amount of wood that is extracted from the forest.
-  * Percentage of roundwood transformed into fuelwood ** Source**:[[http://ec.europa.eu/eurostat/statistics-explained/index.php/Wood_products_-_production_and_trade</font| http://ec.europa.eu/eurostat/statistics-explained/index.php/Wood_products_-_production_and_]][[http://ec.europa.eu/eurostat/statistics-explained/index.php/Wood_products_-_production_and_trade</font|trade]]
+Source: Forest inventories of single countries
+  * Percentage of roundwood transformed into fuelwood
+Source:[[http://ec.europa.eu/eurostat/statistics-explained/index.php/Wood_products_-_production_and_trade| http://ec.europa.eu/eurostat/statistics-explained/index.php/Wood_products_-_production_and_trade]]
 **__Variables____:__ **
@@ Line 62: / Line 68: @@
 **(1) Calculation of the slope angle of accessible forest:**Forested areas within the maximum access distance from forest roads are extracted from the original forest layer and their slope is calculated (in %) The 200m serve as a threshold, all pixels that are further away from the street are not considered in the following calculation.
-**(2)Calculation of access distance: **Based on Clouet & Berger (2009), the maximum distance from which every pixel (extracted in Step 1) can be accessed, due to its topographic conditions, is calculated. The access distance of a pixel can be lower than the actual distance from the street and therefore, all pixels that are further away from the road than their access distance are removed.
+**(2) Calculation of access distance: **Based on Clouet & Berger (2009), the maximum distance from which every pixel (extracted in Step 1) can be accessed, due to its topographic conditions, is calculated. The access distance of a pixel can be lower than the actual distance from the street and therefore, all pixels that are further away from the road than their access distance are removed.
 **(3) Disaggregation of statistical data to LAU2 level:**The data about the production of roundwood is disaggregated to LAU2 level via the share of accessible forest in every LAU2.
-|statistical data about fellings ÷ accessible forest in region = average fellings per unit of accessible forest_PARA__TABLE_INS__PARA__TABLE_INS__PARA__TABLE_INS__PARA__TABLE_INS_
+//statistical data about fellings/accessible forest in region = average fellings per unit of accessible forest//
-   average felling × accessible forest in LAU = LAU felling|
+//average felling*accessible forest in LAU= LAU fellings//
 <font 14px/inherit;;inherit;;inherit>Dividing the statistical data by the accessible forest area in each region gives an average value of the produced roundwood per accessible forest for each region. For all LAUs in the region, this average value is multiplied with the total accessible forest area of the LAU2. The result is the amount of roundwood that is produced in the LAU2.</font>
@@ Line 73: / Line 80: @@
 **(4) Calculation of fuelwood production:**  With statistical data about the share of roundwood that is transformed into fuelwood, the amount of fuelwood that is produced in every LAU2 is estimated.
-|
+{{:en:fuelwood_flow.jpg?nolink&603x1200}}
+{{:en:test_legens.jpg?nolink&500x297}}
+<font 12px/inherit;;inherit;;inherit>__References:__</font>
+<font 12px/inherit;;inherit;;inherit>__Clouet, N.; Berger, F. (2009): Modélisation des surfaces débardables au tracteur forestier en zone de montagne. SIG 2009. Confeérence Francophone ESRI__</font>