Spatial Vertical Distribution Rule Analysis of Forest Biomass Based on Remote Sensing

摘要

Mankind currently is facing with the most serious environmental problems, such as the loss of forests, pollution, biodiversity loss, especially CO2 produced by human activities and sharp rise in the concentration of Greenhouse Effect resulted from it, so the global carbon cycle is becoming mankind's major concern. However, analysis of changes in forest biomass is the basis to carbon cycle and dynamic analysis of a terrestrial ecosystem. By using remote sensing technology, on the basis of forest biomass in Heilongjiang Changbai Mountain in China among the four periods: 1970s, 1980s, 1990s and after 2000 which inverted from quantitative geoscience model of remote sensing, based on ENVI remote sensing information platform, it discussed the spatial changes pattern of forest biomass on the study area, especially the trend of the forest biomass with elevation, slope, aspect changes respectively. It concluded that the spatial vertical distribution of forest biomass in the study area is in the elevation of 300 meters the forest biomass is maximum, about 35%, the higher altitudes the forest biomass smaller; the distribution of forest biomass with the slope of the descending order is the gentle slope> flat slope> incline slope> steep slope> urgent slope> dangerous slope; and forest biomass is largest in the region of aspect less than 5°, reaching 28%.