Dead wood - Revision history

Alvlin at 13:48, 25 November 2024

2024-11-25T13:48:40Z

← Older revision		Revision as of 14:48, 25 November 2024
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	{{Languages}}		{{Languages \| Dead wood}}
	[[Category:Model]]		[[Category:Model]]
	[[Category:Dead Wood]]		[[Category:Dead Wood]]

Peder: /* If current dead wood has not been measrued */

2016-03-21T13:08:43Z

If current dead wood has not been measrued

← Older revision		Revision as of 14:08, 21 March 2016
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	Dead wood is part of the Swedish NFI data and is included in those Heureka-databases to which NFI-data has been imported.		Dead wood is part of the Swedish NFI data and is included in those Heureka-databases to which NFI-data has been imported.

	====If current dead wood has not been ~~measrued~~====		====If current dead wood has not been measured====
	In case you do not have access to such data but still want to assume some intiial occurrence of dead wood, statistics from the Swedish NFI can be used by setting Initial deadwood = Simulate (in [[ControlTable Dead wood#Simulation level\|control table Dead wood]]). You can set three different levels for this; Low, Medium or High, see [[ControlTable Dead wood#Simulation level\|Dead Wood Simulation Level paramter]] in control table Dead Wood.		In case you do not have access to such data but still want to assume some intiial occurrence of dead wood, statistics from the Swedish NFI can be used by setting Initial deadwood = Simulate (in [[ControlTable Dead wood#Simulation level\|control table Dead wood]]). You can set three different levels for this; Low, Medium or High, see [[ControlTable Dead wood#Simulation level\|Dead Wood Simulation Level paramter]] in control table Dead Wood.

Peder at 16:37, 18 March 2016

2016-03-18T16:37:02Z

← Older revision		Revision as of 17:37, 18 March 2016
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	\|} -->		\|} -->

	<div id="DecayClassDefaultDist"></div>		<div id="DecayClassDefaultDist"></div>

	==Default decay class distribution==		==Default decay class distribution==
	If you import data on dead wood occurrence, but only for the total and not per decay class, a default distribution is assumed, based on Swedish NFI data:		If you import data on dead wood occurrence, but only for the total and not per decay class, a default distribution is assumed, based on Swedish NFI data:

Peder: /* Referenser */

2016-03-18T15:51:10Z

Referenser

← Older revision		Revision as of 16:51, 18 March 2016
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	\|}		\|}

	==~~Referenser~~==		==References==
	<references />		<references />

Peder: /* Påverkan av slutavverkning på förekomsten av död ved */

2016-03-18T15:47:36Z

Påverkan av slutavverkning på förekomsten av död ved

← Older revision		Revision as of 16:47, 18 March 2016
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	You can always set control table parameter [[ControlTable Dead wood#Initial Dead Wood \| Initial Dead Wood]] = None, whether you have imported dead wood data or not. Then the amount of dead wood in year 0 will be zero in a simulation.		You can always set control table parameter [[ControlTable Dead wood#Initial Dead Wood \| Initial Dead Wood]] = None, whether you have imported dead wood data or not. Then the amount of dead wood in year 0 will be zero in a simulation.

	==~~Påverkan av slutavverkning på förekomsten av död ved~~==		==Effect of clear cutting of the presence of dead wood==
	~~I samband med slutavverkning finns stor~~ risk ~~att mycket av den döda veden förstörs av markberedning och av avverkningsmaskinerna~~.		When clear cutting a stand there is a significant risk that much of the dead wood will be destroyed by harvesting machines.

	~~Om du låter~~ Enable ~~decomposition~~ due to Final Felling ~~vara~~ True (default), ~~kommer en del av den döda veden som finns i klass~~ 0, 1, 2 ~~och~~ 3 ~~att nästan helt förstöras och placeras i klass~~ 4~~. För klass 0-3 flyttas en lika stor andel av det som fanns i varje klass före slutavverkningen~~.		If you control table parameter [[ControlTable Dead wood#Enable Decomposition due to Final Felling\|'''Enable Decomposition due to Final Felling''']] is True (default), a certain (fixed) proportion of the dead wood volume in decay class 0, 1, 2 and 3 is assumed being destroyed and moved to class 4.

			See [[ControlTable Dead wood]] for more settings related to '''Enable Decomposition due to Final Felling'''.
			<!--
	Decomp. Final Felling No Soil Preparation anger hur stor andel av den döda veden i klass 0-3 som förstörs (och överförs till klass 4) när beståndet slutavverkas men ingen markberedning görs. Detta är således den påverkan på den döda veden som själva slutavverkningsingreppet orsakar, och den är per default låg i förhållande till markberedningen.		Decomp. Final Felling No Soil Preparation anger hur stor andel av den döda veden i klass 0-3 som förstörs (och överförs till klass 4) när beståndet slutavverkas men ingen markberedning görs. Detta är således den påverkan på den döda veden som själva slutavverkningsingreppet orsakar, och den är per default låg i förhållande till markberedningen.

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	Decomp. Set-Asides No Soil Preparation anger hur stor andel av den döda veden i klass 0-3 som förstörs (och överförs till klass 4) på en hänsynsyta när huvudbeståndet slutavverkas men ingen markberedning görs		Decomp. Set-Asides No Soil Preparation anger hur stor andel av den döda veden i klass 0-3 som förstörs (och överförs till klass 4) på en hänsynsyta när huvudbeståndet slutavverkas men ingen markberedning görs
			-->

	==Proportion standing and downed dead wood==		==Proportion standing and downed dead wood==

Peder: /* Proportion standing and downed dead wood */

2016-03-18T15:38:46Z

Proportion standing and downed dead wood

← Older revision		Revision as of 16:38, 18 March 2016
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	\|}		\|}
			In the [[Dead Wood Results\|results]], there is no separation of standing and downed dead wood ''per decay class''.

	<!--		<!--
	==Proportion standing and downed dead wood==		==Proportion standing and downed dead wood==

Peder: /* Förekomst av kol i död ved */

2016-03-18T15:36:12Z

Förekomst av kol i död ved

← Older revision		Revision as of 16:36, 18 March 2016
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	==~~Förekomst av kol i död ved~~==		==Carbon concentration per decay class==
	~~Förekomst av kol i död ved beräknas utifrån en~~ given ~~koncentration av biomassan~~ (~~torrsubstans~~). ~~Koncentrationerna är i stort sett 50 % men varierar något mellan trädslag och nedbrytningsklasser (~~Sandström ~~m.fl~~. 2007 (~~Tabell~~ 10)<ref name = "SandstromEtAl2007">{{:Bibliografi:SandstromEtAl2007}}</ref>. ~~Förutom för tall och gran fanns vid skrivande stund inga uppgifter~~, ~~och koncentrationen har därför satts till~~ 50 % ~~för övriga trädslag~~.		Values are given as percentage (%) of dead wood dry matter. Based on Sandström et al. 2007 (Table 10)<ref name = "SandstromEtAl2007">{{:Bibliografi:SandstromEtAl2007}}</ref>. Concentrations are close to 50 % but varies a between decay classes and species. At the time of writing, only data for pine and spruce was available, and therefore the concentration for other species was set to 50 %, for all decay classes.
	{\| {{table}}		{\| {{table}}
	\| align="left" style="background:#f0f0f0;width: 10%;"\|'''~~Nedbrytningsklass~~''		\| align="left" style="background:#f0f0f0;width: 10%;"\|'''Decay Class'''
	\| align="left" style="background:#f0f0f0;width: 20%;"\|'''~~Tall~~, ~~contorta och lärl~~'''		\| align="left" style="background:#f0f0f0;width: 20%;"\|'''Pine, Contorta and Larch'''
	\| align="left" style="background:#f0f0f0;width: 20%;"\|'''~~Gram~~'''		\| align="left" style="background:#f0f0f0;width: 20%;"\|'''Spruce'''
	\| align="left" style="background:#f0f0f0;width: 20%;"\|'''~~Övriga trädslag~~'''		\| align="left" style="background:#f0f0f0;width: 20%;"\|'''Birch (and other species)'''
	\|-		\|-
	\| 0\|\|50.32 \|\|49.22 \|\|50.0		\| 0\|\|50.32 \|\|49.22 \|\|50.0
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	\|}		\|}

	~~I resultatredovisningen görs dock ingen särredovisning per nedbrytningsklass för stående och liggande död ved, utan dessa summeras över nedbrytningsklasser (se Resutlatvariabler nedan).~~

	==Referenser==		==Referenser==
	<references />		<references />

Peder: /* Decay class distribution */

2016-03-18T15:32:56Z

Decay class distribution

← Older revision		Revision as of 16:32, 18 March 2016
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	<div id="DecayClassDefaultDist"></div>		<div id="DecayClassDefaultDist"></div>

	==~~Decay~~ class distribution==		==Default decay class distribution==
	If you ~~imported~~ dead wood ~~inventory data~~, but only the total ~~volume~~ and not ~~for each~~ decay class, ~~Heureka~~ is ~~distributing the dead wood according to the table below~~, ~~which is~~ based on Swedish NFI data:		If you import data on dead wood occurrence, but only for the total and not per decay class, a default distribution is assumed, based on Swedish NFI data:
	{\| {{table}} width = 400px		{\| {{table}} width = 400px
	\| align="left" style="background:#f0f0f0;width: 10%;"\|'''Decay ~~class~~'''		\| align="left" style="background:#f0f0f0;width: 10%;"\|'''Decay Class'''
	\| align="left" style="background:#f0f0f0;width: 20%;"\|'''Proportion of total ~~volume~~ (%)'''		\| align="left" style="background:#f0f0f0;width: 20%;"\|'''Proportion of total dead wood (%)'''
	\|-		\|-
	\| 0\|\| 13		\| 0\|\| 13

Peder: /* Standing dead trees vs. downed dead wood */

2016-03-18T15:32:03Z

Standing dead trees vs. downed dead wood

← Older revision		Revision as of 16:32, 18 March 2016
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	Decomp. Set-Asides No Soil Preparation anger hur stor andel av den döda veden i klass 0-3 som förstörs (och överförs till klass 4) på en hänsynsyta när huvudbeståndet slutavverkas men ingen markberedning görs		Decomp. Set-Asides No Soil Preparation anger hur stor andel av den döda veden i klass 0-3 som förstörs (och överförs till klass 4) på en hänsynsyta när huvudbeståndet slutavverkas men ingen markberedning görs

	==~~Standing dead trees vs.~~ downed dead wood==		==Proportion standing and downed dead wood==
	For each decay class, the proportion of the dead wood volume that ~~are~~ standing trees and downed ~~dead~~ wood, respectively, is retrieved from the table below. The table is based on Swedish NFI data:		For each decay class, the proportion of the dead wood volume that consists of standing trees and downed wood, respectively, is retrieved from the table below. The table is based on Swedish NFI data:

	{\| {{table}}		{\| {{table}}
	\| align="center" style="background:#f0f0f0;"\|'''Decay class'''		\| align="center" style="background:#f0f0f0;"\|'''Decay class      '''
	\| align="center" style="background:#f0f0f0;"\|'''Proportion of volume that are standing dead trees (%)'''		\| align="center" style="background:#f0f0f0;"\|'''Proportion of volume that are standing dead trees (%)'''
	\|-		\|-
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	\|}		\|}
			<!--
			==Proportion standing and downed dead wood==
			The proportion of dead wood that consists of downed logs vs. stand trees are handled as constant for a given decay class. Based on statistics from the Swedish NFI-data.
			{\| {{table}} width = 400px
			\| align="left" style="background:#f0f0f0;width: 10%;"\|'''Decay Class'''
			\| align="left" style="background:#f0f0f0;width: 20%;"\|'''Proportion downed logs (%)'''
			\|-
			\| 0\|\| 39
			\|-
			\| 1\|\| 39
			\|-
			\| 2\|\| 70
			\|-
			\| 3\|\| 91
			\|-
			\| 4\|\| 98
			\|-
			\|} -->
	<div id="DecayClassDefaultDist"></div>		<div id="DecayClassDefaultDist"></div>

Peder: /* Standing dead trees vs. downed dead wood */

2016-03-18T15:27:16Z

Standing dead trees vs. downed dead wood

← Older revision		Revision as of 16:27, 18 March 2016
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	\| align="center" style="background:#f0f0f0;"\|'''Proportion of volume that are standing dead trees (%)'''		\| align="center" style="background:#f0f0f0;"\|'''Proportion of volume that are standing dead trees (%)'''
	\|-		\|-
	\| 0 ~~och~~ 1\|\|61%		\| 0 and 1\|\|61%
	\|-		\|-
	\| 2\|\|30%		\| 2\|\|30%