Saved renewable and nonrenewable resources and purchased resources and decreased environmental load should be accounted for environmental loading ratio (PELR) and index of sustainability (PESI),namely, PELR=6i=1Fi/F′ and PESI=PEYR/PELR .
The mathematical model of integrated sustainability index is: P=0.14P_1+0.47P_2+0.3P_3+0.09P_4,and the sub-indices are: water quality,water quantity,creature and land use change indices.
On the basis of classification of water resources assessment,this paper discusses the base of building indicators system(IS) for sustainability assessment of water resources use(SAWRU)(ISSAWRU),that is,research progress on indicator system for both sustainable development assessment and water resources assessment. IS for assessing water resources use is a method of water resources evaluation sorted by evaluating indicator number,which is developed from single indicator and multi-indicators.
本文在归纳水资源评价分类基础上,论述了水资源可持续利用评价指标体系(Indicators system forsustainability assessment of water resources use,ISSAWRU)的研究基础,即可持续发展评价指标体系与水资源评价指标体系的研究现状,指出SAWRU需要ISSAWRU。
This paper systematically analyzes the main aspects concerning indicators for the evaluation of agricultural sustainability, including the objectives and contents, classification and structure of the indicator system, basic characteristics of the selected parameters.
This paper analyxes systematically the main aspects concerning indicators for the evaluation of agricultural sustainability,including the objectives and contents,classification and structure of the indicators system,basic characteristics of the selected parameters.
To improve soil quality and maintain sustainable productivity, some measures, including planting mixed conifer with hardwood, preserving residues after harvest, and adopting scientific site preparation, should be taken.
In conclusion, the regional and forest development in Yanbian was sustainable, and the implementation of NFPP was favorable to improving sustainable development of forest region.
It is concluded that though the performance of an air-powered engine is inferior to that of the traditional inert combustion engine, an airpowered vehicle is fit for future green cars to realize the sustainable development of society and environment.
The fashion of gauze layout ensuring the sustainable excitation of discharge at an average power of 60-150 W and a pulse on/off ratio of 10 was described.
Conclusions drawn on the basis of the theory have practical significance for biodiversity conservation and for the sustainable use of the biological resources of aquatic ecosystems.
The results obtained in this study can be used to assess the effect of mineral fertilizers on the soil fauna and to suggest optimum application rates of mineral fertilizers ensuring the sustainable development of meadow herbs.
Thus, our national nuclear industry can not only catch up with the world's advanced level in proper time, but also possess enough stamina for sustainability.
This paper explains and demonstrates the procedures used to develop, the model and finally offers an approach for assessing the feasibility of a construction project in terms of its sustainable performance.
Replant diseases in strawberry caused by Rhizoctonia solani, Fusarium oxysporum and Verticillium dahliae are serious problems for its sustainable production under continuous cropping.
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