Version 2.21

Version 2.21

Languages:

English  • svenska

2023-04-25

Summary

This is a large update to Heureka that has been long in the works. It introduces a range of useful features, quality-of-life changes, improved performance and of course, numerous bug fixes.

New Features

Monte Carlo simulations in RegWise

A Monte Carlo simulation is similar to a regular simulation, but the simulation is automatically repeated a user-defined number of times. The results of all simulations are stored in the database, and can be viewed as summary statistics per variable: mean, minimum and maximum value, standard deviation and confidence interval.

The purpose of the functionality is to test the effects of stochastic elements in the input conditions of a Heureka analysis: the input data and the different models that together are used to forecast forest development over time. Several models used in projecting forest development and assigning treatments can be run in stochastic mode: Mortality and Ingrowth in established forests, Height distribution and Damages in young forests, and the allocation of treatment units to control categories within a forest domain and jumps in priority order in action planning. There is currently no support for stochastic input data (e.g. forest data or timber prices).

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  Viewing a report for a Monte Carlo simulation allows the user to see confidence interval, standard deviation and min/max values
  

For further details and instructions on how to use the functionality, consult the Heureka Help

Checkerboard Forestry in PlanWise

It is now possible to simulate a forest management system called Checkerboard felling (available from versions 2.18 in RegWise) also in PlanWise.

When simulating Checkerboard forestry, the treatment unit is split in a "white" and a "black" part, where the final felling of the white part is delayed until the regeneration/young forest of the black part has reached the specified mean height.

At present the white and black colors have no spatial extent, and no edge effects - neither (positive) on the white part nor (negative) on the black part - are considered in the simulation of Checkerboard forestry.

For further details and instructions, please consult the Heureka Help

Adjustment Factors per Species and Period

The settings Growth Factor and Mortality Factor Established Forest have been moved into a new control table setting called Growth and Mortality Adjustment Factors, in the Production Model control table. A factor for height growth has also been added.

Growth and mortality adjustment factors (in established forest) are set per period and species' group. If data entry for a period is missing, closest previous period's value will be used. If data entry for a species is missing the user specified default value is used.

These factors are only intended for sensitivity analyses and research.

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  Example demonstrating the look of the Adjustment Factors editor.
  

Shrub Cover Models

Three new result variables have been added: Bilberry-, Heather- and Cowberry-cover. These can be found in the result group Non-wood ecosystem services.

There are two available models for calculating Bilberry- and Cowberry-cover. These can be changed in the control table Recreation.

Please note that the Hedwall models can only be used with a database containing data for inventoried cover for respective species and the carbon:nitrogen-ratio in the humus layer.

Environmental Goal Indicators

Four new result variables useful for assessing the fulfilment of the national environmental goal Levande skogar have been added to the result category Structural Diversity, with conditions to be classified as such as follows:

• Deadwood-rich forest: 20 m3 of dead wood with a diameter of at least 20 cm.
• Forest with 60+ large tree: At least 60 large trees per hectare. At least 45 cm in diameter for conifers, beech and oak. At least 35 cm in diameter for other species.
• Mature broadleaf-rich forest: Forest that older than 80 years in boreal regions or 60 years in boreonemoral and nemoral regions, and at least 25 % of the basal area is broadleaf.
• Old forest: Forest older than 140 years in boreal regions or 120 years in Boreonemoral and nemoral regions.

There is a premade report called Miljöförhållanden for displaying the environmental goal indicators. Download it by clicking the Download Templates-button. It can then be found in category 6. Naturvård.

Other Changes

• Updated application suite to .NET Framework 4.8
• Changed name of control table Soil Model to Carbon
• Changed name of result group Recreation to Non-wood ecosystem services, including also the shrub cover model results
• Changed name of result group Harvested Wood Products to Carbon in Harvested Wood Products
• Added settings for Harvested Wood Products to the Carbon control table
• Time between thinning and final felling is now specified in years instead of periods, in the Treatment Program Generator control table
• Faster loading of map control in initial state
• Simplified import format for optimization results (the old format is still supported)
• Birch added as its own category in the Dead Wood result group
• User can now specify a fraction of cut stems to leave in forest as dead wood after a final felling treatment in the Treatment Model control table

Bug Fixes

• RotationAgeFactor was not considered when calculating initial state
• Register Tree Data had a faulty plot type check
• Possible incorrect wait time between thinnings and other treatments in tactical TPG
• Tree List Importer didn't show an error when the mandatory column InventoryYear was missing
• Mortality was sometimes over- or underestimated in RegWise
• Wrong decay class assigned to dead trees in IPAK importer
• NPV incorrectly calculated in the optimization summary (not in the actual results)
• StandWise: Overstorey trees that were previously removed would return when backing to period 0, and never be removed again
• Fixed error when cleaning period overlapped final felling period in TPG
• Fixed error when importing optimization model item
• Fixed crash when calculating cliques and clusters
• Forwarder cost could be calculated to a negative value in very harsh conditions
• After treatment proposals were applied, the control category for the first generation was always used even if a final felling was performed

Details from bugtracker

Id	Category	Severity	Summary	Fixed_in_version	Resolution	Comment
0000572	TPG	major	Inget skötselprogram skapat	2.21.0	fixed	Inget skötselprogram skapat
0000564	TPG	minor	Tactical TPG: Inconsistent behaviour in time between thinnings and other treatments	2.21.0	fixed	Tactical TPG: Inconsistent behaviour in time between thinnings and other treatments
0000579	Other	crash	Fel vid beräkning av klickar och avverkningskluster	2.21.0	fixed	Fel vid beräkning av klickar och avverkningskluster
0000567	Optimization	minor	Small error in the Optimization wizard	2.21.0	fixed	Small error in the Optimization wizard
0000571	Optimization	minor	Error when importing model item	2.21.0	fixed	Error when importing model item
0000565	Optimization	minor	Selecting a parameter with a removed resultproperty throws exception	2.21.0	fixed	Selecting a parameter with a removed resultproperty throws exception
0000574	Optimization	minor	Fel NPV i optimeringsinfo för alternativet MaxNPV	2.21.0	fixed	Fel NPV i optimeringsinfo för alternativet MaxNPV
0000566	Map plugins	trivial	Buffer Dialog returns error in some cases	2.21.0	fixed	Buffer Dialog returns error in some cases
0000577	Growth / production	minor	Breeding effect remains after resetting treatment unit in StandWise	2.21.0	fixed	Breeding effect remains after resetting treatment unit in StandWise
0000578	Growth / production	minor	Overstorey Remover for initial regeneration is removed when backing to period 0	2.21.0	fixed	Overstorey Remover for initial regeneration is removed when backing to period 0
0000584	Growth / production	minor	Mindre fel i beräkning av SIS för tall på torvmark i norra Sverige	2.21.0	fixed	Mindre fel i beräkning av SIS för tall på torvmark i norra Sverige
0000580	General	minor	Negative Forwarder Cost	2.21.0	fixed	Negative Forwarder Cost
0000563	General	minor	Simulation of treelist fails in Register Tree Data	2.21.0	fixed	Simulation of treelist fails in Register Tree Data
0000581	General	minor	Fuel wood not collected from natural mortality	2.21.0	fixed	Fuel wood not collected from natural mortality
0000573	General	major	Mortality calculation sometimes biased towards too few or too many stems	2.21.0	fixed	Mortality calculation sometimes biased towards too few or too many stems
0000583	General	minor	Treatment proposals: TPG may switch over to control category 1	2.21.0	fixed	Treatment proposals: TPG may switch over to control category 1
0000576	General	minor	IPAK import: Dead trees assigned to wrong decay class	2.21.0	fixed	IPAK import: Dead trees assigned to wrong decay class
0000569	Data import	minor	Treelist importer ignoring missing InventoryYear	2.21.0	fixed	Treelist importer ignoring missing InventoryYear
0000561	Data import	trivial	Fel rubrik på fråga "create units for retention patches" vid import av beståndsregister direkt vid skapandet av ett nytt projekt	2.21.0	fixed	Fel rubrik på fråga "create units for retention patches" vid import av beståndsregister direkt vid skapandet av ett nytt projekt
0000585	Data import	minor	Plots created in Register Tree Data does not get assigned distanceToCoast.	2.21.0	fixed	Plots created in Register Tree Data does not get assigned distanceToCoast.
0000568	Control categories	feature	Feature: Add settings for Harvested Wood Products	2.21.0	fixed	Feature: Add settings for Harvested Wood Products
0000560	Control categories	minor	RotationAgeAdjustFactor is not considered when calculating initial state	2.21.0	fixed	RotationAgeAdjustFactor is not considered when calculating initial state