|
Forest fires are burning forests phenomenon, through the burning forest types and spatial distribution pattern of research, not only on the occurrence of forest fires could predict, but also for the prevention of forest fires provide a theoretical basis. Meanwhile, according to the different types of fuel burning fire prevention measures to develop guiding significance. In this study, eight Habahe County Forest to investigate major forest types in the different forest types within the trees, shrubs, herbs, surface fuel, stand factors of basic data and sample collection surveys, laboratory analysis, using correlation analysis method, the fuel moisture content, calorific value, ash content, extract the correlation analysis, and the establishment of the principal component equation, derived factor combustible comprehensive physical property values. Through correlation analysis of surface fuel loading and stand factors correlation analysis, and the establishment of fuel loading and stand factors predictive models. On this basis, on the physicochemical properties of combustible materials, fuel loads as different types of forest types burn consolidated component, using the assignment method, the combustion of different types of forest type classification, and through geographic information systems and landscape pattern analysis software Habahe forest landscape pattern analysis, come to its flammability and the relationship between landscape pattern, whereby the following conclusions: (1) Through the combustible physical factor correlation analysis, the calorific value and extractives a significant positive correlation, combustible extract content is higher in the higher calorific value; ash content and extract content was negatively correlated with higher content of extractives lower ash content; ash content and thermal values ??were negatively correlated inversely calorific value and ash content, the lower the ash content, calorific value is higher. (2) Habahe forest dominated by conifers, depending on the species, the combustion of composite indicators Sort seen eight major forest types flammability order: pine larch mixed gt; fir Chunlin gt; larch gt; spruce Chunlin gt; fir larch mixed gt; European mountain Yang Chunlin gt; warts birch branches Chunlin gt; larch and birch branches warts tremula mixed. (3) surface fuel load and stand slope, altitude, average height, average diameter, canopy density, the average dead branch height correlation analysis and the establishment of stepwise regression equations derived fuel load is affected by many stand factors influence a single factor on the impact of fuel load is only a partial and one-sided, in the study when the fuel load to combine multiple factors to study. (4) White Haba camp forest combustibility and flammability strong the largest proportion of small, anti-interference ability of the worst fires, and their stability and resilience after disturbance worst anti-forest fire Habahe camp interference ability , their stability and disruption recovery ability.
|