JOURNAL OF NATURAL RESOURCES ›› 2016, Vol. 31 ›› Issue (11): 1958-1968.doi: 10.11849/zrzyxb.20160046

Previous Articles     Next Articles

Transformity Calculation Method of Hydropower

HE Cheng-long   

  1. College of Civil Engineering & Architecture, Jiaxing University, Jiaxing 314001, China
  • Received:2016-01-11 Revised:2016-06-11 Online:2016-11-20 Published:2016-11-20
  • Supported by:
    Humanities and Social Sciences Foundation Program of Ministry of Education, No.14YJAZH030; Education Department Program of Zhejiang Province, No.FX2014071

Abstract: Emergy analysis theory is a new quantitative analysis method to assess ecological effects of hydropower projects. In order to evaluate unified and quantitative ecological effects of hydropower project with emergy analysis, hydropower transformiy must be calculated firstly. Transformity is the key parameter for emergy calculation analysis. Transformity configuration system of hydropower project is established, its input being the hydropower project construction, and its output being the positive and negative effects on social, economic and ecological environment. According to the characteristics and attributes of resources and products, the transformity calculation method of hydropower is developed based on the input-output analysis of hydropower projects. The method can calculate the hydropower transformity not only for all hydropower projects of a country, but also for a specific hydropower project. Accurately accounting the inputs and outputs of the hydropower project construction is the basic work to calculate the hydropower transformity. The quality of the account will influence the accuracy of the hydropower transformity calculation results. The studies are shown as follows. Firstly, the hydropower transformiy of China showed a decreasing trend, from 2.41×1012 seJ/kWh in 2003 to 5.69×1011 seJ/kWh in 2014. But after 2011, it gradually stabilized. This means that the effectiveness of hydropower project construction was improved, and the effects of hydropower development on social, economic and ecological environment became stable. But it will stabilize while the technology and management level of the production is relatively stable. Secondly, Chinese hydropower transformity is comparable to the hydropower transformity in the US, higher than the transformity of solar power generation and lower than the transformity of thermal electric power. This shows that the transformity for the same product is different in countries with different production and management levels. At the same time, the transformity for the same product may be also different due to the different production modes. The hydropower transformity obtained in this article is based on all Chinese hydropower projects, and it reflects the overall situation of hydropower projects construction in China. The system boundary should be determined reasonably when a single hydropower project is used as the research object. Thirdly, the main factors affecting Chinese hydropower tansformity are the reservoir inundation, land occupied by water conservancy facilities, and nonrenewable resources input such as earthwork and stonework. At last, four effective ways are put forward to decrease the hydropower transformity. They are rational management to reduce losses caused by floods and droughts, ecological migration to reduce the impact of immigration on society, scientific planning to reduce reservoir inundation, optimizing engineering design and construction to reduce consumption in kind. This study can provide the basis data for the ecological effect quantitative analysis of hydropower projects.

Key words: emergy analysis theory, hydropower, transformity

CLC Number: 

  • X37