Potenciální energie akumulovaná v přirozené lesní biomase
| Title in English | Potential energy accummulated in natural forest vegetation |
|---|---|
| Authors | |
| Year of publication | 2008 |
| Type | Article in Periodical |
| Magazine / Source | Životné prostredie |
| MU Faculty or unit | |
| Citation | |
| Field | Forestry |
| Keywords | energy content - wood - mapping - potential forest canopy |
| Description | It is a well-known fact that the worldwide rising consumption of energies and the current dependency on fossil fuels threatens to exhaust resources in the future. Plants and woody plants actively convert solar energy into the form stored in the biomass and especially wood has always been used as fuel. The aim of this work was to create a map of potential energy accumulated in the natural forest biomass in the Czech Republic. The base for creating this map were the individual areas from the map of potential natural vegetation in the Czech Republic, at a scale of 1: 500 000. Based on literature synthesis, the potential natural representation of the most often appearing woody plants has been determined and based on the site conditions also their quality and average rotation period. In accordance with forestry mensurational tables, the wood cubic yardage in timber was counted, then it was converted according to specific gravity to wood weight of individual woody plants as represented on 1 hectare of vegetation. According to the fuel efficiency tables of individual woody plants at a given moisture content, we then found out what amount of energy in the wood is bound to 1 ha of area for individual woody plants and finally on the whole in timber for the whole vegetation. The resultant value of stored energy was then increased by the conversion to the real amount of biomass including smallwood (wood mass below 7 cm). During the whole process of calculation a lot of compromises and simplifications were needed which enabled automation of the whole process as well as getting results in real time. We are aware of these simplifications and we will further work in more detail with input parameters because the input parameters, all calculations and the method of processing correspond with the scale of the final map of 1: 2 000 000 where the calculated data offer real results (see picture 1). A more detailed review of average values of potential energy accumulated in natural forest biomass for aggregate association groups can be found in table 1. |
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