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根据近两年来在黄山市辖区内野生豆科植物的采集、调查、标本鉴定和文献资料查阅结果表明,黄山市野生豆科植物资源有35属95种。分析了这些植物的主要用途、分布、应用价值,对其中极具开发价值的10种植物的合理开发提出了建议。 相似文献
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浙江省金华市婺城区城北街道北苑社区居委会成立于1996年12月,1998年6月与物业管理实行两块牌子一套班子的管理模式.社区位于金华市区北端,辖区面积30万平方米,有住宅楼84幢,住户2359户,人口达7000余人,其中文明楼院32幢,五好文明家庭1040户,占总户数的40%以上. 相似文献
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战争不仅浪费大量的人力、物力、财力,破坏人类生存的社会环境,而且也破坏人类生存的自然环境.战争对生态环境的影响是多方面的,本文介绍了战争对生态环境的直接影响与间接影响,对环境要素的直接影响分为对水体、对生物、对大气、对土壤的影响;间接影响可分为常规武器、生物化学武器、核武器对生态环境的影响. 相似文献
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本文分析了废旧手机污染严重,但难以回收的现状,提出用押金制度解决这一难题,并着重就手机押金制度的实施环节、实施范围及押金数额等问题进行了探讨,提出了一些可推进和保障押金制度顺利实施的建议. 相似文献
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2007年6月5日是第36个世界环境日。当前,党中央、国务院高度重视污染减排工作。作为一个负责任的发展中大国,中国以“污染减排与环境友好型社会”为主题,积极回应世界环境日的全球行动,具有重要的现实意义和深远的战略意义。与此同时,环保总局对外发布了2006年中国环境状况,对去年我国的总体环境现状和环境保护工作取得的成就进行了全面的回顾。 相似文献
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城镇化是推动我国经济社会发展的重要动力,在高速发展的同时,带来大量污染排放,威胁乡村环境质量与可持续发展。在对乡村生态环境问题剖析的基础上,从战略、实施、方式等层面探索解决思路,围绕科学规划、发展方式、基础建设、管理机制、宣传教育等方面分析关键点,加强乡村环境保护,保障城镇化建设健康发展,为促进农村农业持续发展提供持久动力。 相似文献
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Trametes versicolor decolorized 2000 mg L(-1) of the mono-azo substituted naphthalenic dye Amaranth with no dye sorption observed visually. The changes in the toxicity were assessed over a period of 30 d for the dye-treated viable culture, control (no dye added), and a boiled culture treated with dye, using the Microtox Acute Toxicity assay. Before dye addition, the culture filtrate had some toxicity, which increased after the dye addition. The toxicity of the dye-treated culture decreased during the treatment. The loss of toxicity occurred at the same time, with the loss of color suggesting that detoxification is associated with decoloration. The change in pH was due to natural metabolic processes and had a small effect on detoxification. Because the toxicity of the treatment was similar to that of the control at the end of the treatment, the effluent seems to be safe for release into the environment, potentially rendering this treatment suitable for industrial application. 相似文献
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泵站树状给水管网流量具有随机性,而这种随机性变化会直接影响管网的建设费用和动力费用.针对这-特点,应用随机规划原理,建立泵站树状给水管网机会约束模型,编写基于随机模拟的遗传算法程序求解该模型.机会约束模型能较客观地反映该管网的实际工况,使优化设计结果更符合实际. 相似文献
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Günay Kocasoy 《Environmental management》1989,13(4):469-475
The increase in the number of tourists visiting a coast is desired by most of the countries for economic reasons. However, this increase in tourism may cause pollution of the sea. This can be only avoided by proper planning and by predicting the carrying capacity of the coast in terms of sea pollution. This is especially important for developing countries where part of the wastewater is discharged without any treatment into the sea.In the present study the beaches were classified according to their use — and consequently the amount of waste discharged into the sea — into four groups: (1) coasts that are used only for swimming and recreational purposes; (2) coasts used simultaneously for dwelling, swimming, and recreational purposes; (3) coasts along which only dwellings exist; and (4) natural and man-made harbors, i.e., coasts used as shelters. During the survey,40,320 observations were made between December 1985 and February 1988 to determine the effect of the number of tourists on seawater quality. The results obtained were analyzed by a multilinear regression program to obtain an empirical equation giving the extent of the sea pollution in terms of coliform concentration as a function of population density and some other environmental factors.The equations derived in this study enable the determination of the carrying capacity of a beach in terms of pollution as well as the expected degree of pollution corresponding to a given population density. Furthermore, it allows the prediction of the extra carrying capacity that can be obtained by improving the waste-disposal conditions. 相似文献
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阐释了信息产业专门化街区的内涵,结合对合肥市黄山路信息产业专门化街区构成要素的分类及其邻近度的分析,分别从空间结构演化、景观演化、功能演化三方面阐述了合肥市黄山路由"电子一条街"向"信息产业专门化街区"的总体演化阶段,探讨了信息产业专门化街区的未来发展趋势。 相似文献
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