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Seasonal characteristics of the total nitrogen TN), total phosphorus (TP) and other factors in the sediment and water in the Yuyuantan Lake were analyzed. Correlation among all forms of P was estimated considering the seasonal variations of TP. The result showed that the concentrations of TN and TP are lower in summer and higher in autumn. All nutritional indexes are much higher in the west of lake...
The consumption of final energy and consumptions of different varieties of energy in Beijing from 1990 to 2006 are presented using data from the China Energy Statistical Yearbook 2007 and Beijing Statistical Yearbook 2007. Energy-CO2 emission in Beijing was calculated by sector and fuel type using the Intergovernmental Panel on Climate Change reference approach and statistical data, and the relationship...
Coal, petroleum and natural gas are the three main sources of fossil energy. This paper classified fossil energy sources as eco-assets. Using ecological economics, it was calculated that the cumulative emergy wastage of fossil energy sources in China from 1953 to 2006 was 7.08 times 1025sej. This paper considered agricultural residue to be a substitute for fossil energy sources. The results showed...
For understanding the regional response to climate change, we explain the characteristics and change of landscape patterns at Huihe National Nature Reserve, Hulun Buir, Inner Mongolia, China. By the visual interpretation method and three-period TM images, we generated landscape classification information with the support of the Arcmap software platform and in combination with ground investigation...
In China the current approaches to evaluating the efficacy of the ecosystem service for avoided-reservoir-sedimentation cannot identify the supplier and beneficiary. In addition, the use of the same whole-country coefficient of sediment delivery for different areas can lead to inaccurate results. Based on the integrated geographic information system (GIS) software package, ArcGIS9.2, a new model was...
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