Material and energy flow is necessary to ensure the normal running of economic and environmental system. In order to improve resource productivity and solve environmental problems fundamentally, it is essential to research the metabolism process and environmental impact when we transform raw materials and energy into products and wastes. Based on the methodology of regional material flow analysis, energy flow analysis, ecological footprint and emergy analysis, the concept, research framework and analysis indicators of regional material and energy flow analysis were proposed, and then applied to analyse the economic and environmental system of Tianjin during 1998-2007. The analysis results indicated: the total material consumption was 97.25 million t, and the total energy consumption was 47.15 t (coalequivalent) in 2007, with the average annual growth rate of over 10% and 8% respectively; the outside resource input occupied about 46% in direct material input, of which 40% of outside resource input was coal from outside region completely; low resource output ratio and high intensity of resource consumption led to large consumption of resources and continuous increase of total emission of pollutants, which brought great pressure to the regional resource and environmental system, and made the environmental capacity of pollutants in saturated condition on the whole. Finally, the corresponding suggestions were proposed in view of the existing problems.
LIU Wei, JU Mei-ting, CHU Chun-li, SHAO Chao-feng, TIAN Wen-xin
. Material and Energy Flow Analysis and Empirical Study in Regional Environmental-economic System[J]. JOURNAL OF NATURAL RESOURCES, 2011
, 26(8)
: 1435
-1445
.
DOI: 10.11849/zrzyxb.2011.08.036
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