农作物生物质能的遥感估算——以广东省为例

农作物秸秆生物质能项目是生物质能最具产业化和规模化的集约利用方式之一,也是解决能源可持续发展和环境问题的有效途径之一。目前国内外对农作物秸秆生物质能总量估算都是基于传统的实地调查和统计数据来获取,缺乏详细的生物质能的空间分布信息,对生物质能源利用与规划指导粗略。论文以广东省为例,利用基于BIOME鄄BGC模型改进的MOD17A2/A3数据和TM数据对生物质能总量及空间格局进行估算和分析。根据生物质能可用部分的影响因素,建立可用生物质能决策模型。为能源消耗量大的省份在生物质能的有效利用方面提供了依据。

Estimation of Cropland Residue Bioenergy Using Remote Sensing: A Case Study of Guangdong Province

Energy shortage and greenhouse gas emissions are two serious problems in China because the growing economy has consumed a large amount of energy in the world.Energy issues have become one of the top agenda in making its national policies.Reduction of greenhouse gas emissions and seeking for alternative energy sources are important for alleviating the environmental problems in China.Centralized using of agricultural residue as a possible source of feedstock for bio-energy production can offer interesting options of producing energy for China.At the same time biomass residues are relatively abundant in China.The estimation of the amount of available biofuel is the first step to utilize this kind of energy.However,the quantities of biomass energy are often calculated based on the statistical data and traditional measurement.There is a general lack of spatial details in using this kind of information because of the aggregated measurement.Detailed information about the distribution of biofuel is important for decision making in using this kind of energy,such as finding the suitable sites for plant building.This can guarantee that the use of biofuel is economical and operational.This paper provides a method to estimate the amounts and spatial distribution of biomass residues using remote sensing imagery,such as the modified MOD17A2/A3 data by light utilization efficiency in Guangdong Province based on BIOME-BGC model and TM data.A decision-support model is developed for measuring the usable biomass for generating bio-fuel by analyzing a number of factors.This model has been tested in Guangdong,which is one of the largest amount of energy consumption in China.The study demonstrates that this method has advantages in biofuel estimation with plausible results.The total available amount of biomass for paddy rice and dry crops in Guangdong is about 20,756.61×1010kJ according to this model.