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Mechanisms and assessment of water eutrophication 被引量:23
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作者 Xiao-e YANGt Xiang WU +1 位作者 Hu-lin HAO Zhen-li HE 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2008年第3期197-209,共13页
Water eutrophication has become a worldwide environmental problem in recent years,and understanding the mechanisms of water eutrophication will help for prevention and remediation of water eutrophication.In this paper... Water eutrophication has become a worldwide environmental problem in recent years,and understanding the mechanisms of water eutrophication will help for prevention and remediation of water eutrophication.In this paper,recent advances in current status and major mechanisms of water eutrophication,assessment and evaluation criteria,and the influencing factors were reviewed.Water eutrophication in lakes,reservoirs,estuaries and rivers is widespread all over the world and the severity is increasing,especially in the developing countries like China.The assessment of water eutrophication has been advanced from simple individual parameters like total phosphorus,total nitrogen,etc.,to comprehensive indexes like total nutrient status index.The major influencing factors on water eutrophication include nutrient enrichment,hydrodynamics,environmental factors such as temperature,salinity,carbon dioxide,element balance,etc.,and microbial and biodiversity.The occurrence of water eutrophication is actually a complex function of all the possible influencing factors.The mechanisms of algal blooming are not fully understood and need to be further investigated. 展开更多
关键词 Eutrophication mechanisms Influencing factors Nutrient enrichment assessment criterion Water quality
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土地开发利用中土壤氡气的检测与评价 被引量:1
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作者 袁平凡 梅祖明 《上海国土资源》 2012年第2期43-46,82,共5页
对土地开发利用中土壤氡检测及其环境质量评价进行了探讨,提出了土壤氡气现场调查的技术要点,以氡浓度与表面氡析出率指标确定环境质量评价分级,并对相应的土地利用作了分析。
关键词 生态型土地整治 规划设计 模式研究
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The circulation physiology of agroecosystems
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作者 Richard Dawson 《Ecological Economy》 2007年第1期2-7,共6页
This paper represents an effort to enlarge the understanding of the biophysical foundation of agroecosystemsby using an analogy with the circulation of the blood in the human body. The circulation function in the huma... This paper represents an effort to enlarge the understanding of the biophysical foundation of agroecosystemsby using an analogy with the circulation of the blood in the human body. The circulation function in the human body canbe represented as arterial pressure. The factors affecting arterial pressure in the human body have direct counterpartsin the cultivation-husbandry system. The relationship between circulation pressure and the factors affecting that pressurein the cultivation-husbandry system are similar to the relationship between the arterial pressure and factors affectingarterial pressure in the human body. Furthermore, circulation resistance in the cultivation-husbandry system can beshown to be analogous to the calculation of peripheral resistance in the human body by Poiseuille’s formula. 展开更多
关键词 Agroecosystem assessment criterion Circulation function
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