SHORT TERM MOBILISATION OF BIOMASS POTENTIAL IN CRITICAL SITUATIONS

摘要

Methodology for modelling of biomass potential mobilisation is using detailed spatial data and GIS tools. GIS model serves for identification of standard and additional biomass potentials, which can be used in critical situations. Standard biomass potential reflects availability of biomass from agriculture and forest land e.g. energy crops, residual straw and hay which is not used to maintain soil fertility and animal production and smallwood from forest logging. Mobilisation of biomass e.g. additional potential is based mainly on higher extraction and utilization of forest and agricultural biomass esp. increase of wood and straw utilization for energy purposes at the expense of material utilization, animal production and soil improvement. Additional biomass can be also mobilised by shortening of rotation of SRC plantations. Identification of standard and additional biomass potential can serve as the source of data for design of energy infrastructure (e.g. cogeneration and heating plants with different boiler types) so that it would be prepared for potential critical situations. In case of expected long term deficit (shortage) of conventional fossil fuels biomass potential can be systematically increased through development of energy crop plantations on agriculture land utilization. Standard biomass potential is based on the idea of long term sustainable land utilization and the preference of wood material utilization. Additional potential and mobilisation of biomass in crisis situation is based on the short term limitation of some rules for sustainable soil utilization and change of round wood utilization from forestry. Mobilisation of biomass potential also reflects typical one year production cycle – additional potential availability is limited to one year period. Results of our modelling shows that standard and additional biomass potential is always related to the given region. Many factors influence biomass potential e.g. structure of power plants, age and composition of forests, soil types and climate conditions, etc. Results of biomass potential analysis for given region are not directly transferable to the other regions. Paper presents the application of methodology for standard and additional biomass potential analysis on case example of one of the Czech regions.