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石漠化制约着云南、贵州、广西三个省区的发展。应用能值分析法,以经济和环境资料为主,辅以遥感和GIS获取能值分析所需的数据,编制能值分析表,计算2000和2009年典型石漠化地区生态经济系统能值流,得出石漠化省区资源环境能值、环境负荷率(ELR)、能值产出率(EYR)、能值产出比(ENR)等统计指标,进一步计算构建可持续指数(ESI)、改进的可持续指数(MESI)和可持续年限(ST)等指标。2009年广西、贵州、云南的主要资源环境能值分别为9.6E+25、1.2E+26、1.5E+26sej,可更新资源能值为9.9E+22、7.3E+22、2.0E+23sej,废弃物能值2.1E+22、1.1E+22、1.4E+22sej。结果表明:石漠化地区的ESI和MSEI都具有经济落后地区的显著特征,其ESI的时空演变趋势(0.07)显著低于全国ESI的平均趋势(0.41),石漠化地区可持续发展要稍好于全国平均值,而区域可持续年限从2000年的平均超过100年缩减为2009年的不足50年。
Rocky desertification restricts the development of Yunnan, Guizhou and Guangxi provinces. The emergy analysis method is mainly based on economic and environmental data, supplemented by remote sensing and GIS to obtain the data needed for emergy analysis, and the emergy analysis table is compiled to calculate the emergy flow of eco-economic systems in typical rocky desertification areas in 2000 and 2009 , And obtained statistical indicators such as resources environmental energy value, environmental load ratio (ELR), emergy output rate (EYR) and energy output-to-output ratio (ENR) of rocky desertification areas, and further calculated the construction of sustainable index (ESI) Indicators such as improved sustainability index (MESI) and life expectancy (ST). In 2009, the main resource environmental energy values of Guangxi, Guizhou and Yunnan were 9.6E + 25,1.2E + 26,1.5E + 26sej, respectively, and the renewable resource energy values were 9.9E + 22,7.3E + 22,2.0E + 23sej , Waste energy value 2.1E +22,1.1E +22,1.4E +22 sej. The results showed that both ESI and MSEI in the rocky desertification area have the characteristics of economically backward areas. The spatial and temporal evolution trend of ESI (0.07) was significantly lower than the average trend of national ESI (0.41), and the sustainable development of rocky desertification area was slightly Better than the national average, while the regional life expectancy decreased from an average of over 100 years in 2000 to less than 50 years in 2009.