A holistic microclimate model

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kb:lad [2012/08/15 22:31] – enviadminkb:lad [2012/08/15 22:31] – enviadmin
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 ====== Obtaining Leaf Area Density Data ====== ====== Obtaining Leaf Area Density Data ======
-{{:kb:leafs_at_treee.jpg?300 |Leafs on a tree}}+{{:kb:leafs_at_treee.jpg?350 |Leafs on a tree}}
 The **Leaf Area Density (LAD)** is the portion of leaf surface ($m^2$) within a volume of air ($m^3$). The formal unit is  The **Leaf Area Density (LAD)** is the portion of leaf surface ($m^2$) within a volume of air ($m^3$). The formal unit is 
 $$ \frac{ \text{Leaf surface } (m^2)}{ \text {Reference volume } (m^3)} $$ $$ \frac{ \text{Leaf surface } (m^2)}{ \text {Reference volume } (m^3)} $$
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 ==== Methodology 1b: Leaf collection  ==== ==== Methodology 1b: Leaf collection  ====
  
-{{:kb:leafs_collected.jpg?200 |Collected leafs}}+{{:kb:leafs_collected.jpg?300 |Collected leafs}}
 This methode is straight forward and has certain drawbacks for the tree. You can define your reference volume (1 cubemeter or less) and then collect all the leafs that are inside this volume. You place them on a sheet of paper as close as you can get them and then calculate the leaf surface area. There are also more sophisticated methods available using digital image processing. But as we talk about rude methods here, we restrict outselves to the very basic approach...  This methode is straight forward and has certain drawbacks for the tree. You can define your reference volume (1 cubemeter or less) and then collect all the leafs that are inside this volume. You place them on a sheet of paper as close as you can get them and then calculate the leaf surface area. There are also more sophisticated methods available using digital image processing. But as we talk about rude methods here, we restrict outselves to the very basic approach...