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新疆农业生态环境面临的问题与保护措施 总被引:1,自引:0,他引:1
新疆农业生态环境面临的主要问题有两大类:一类问题为生态问题;另一类问题为环境污染问题。简要介绍了新疆农业生态环境面临的生态问题,重点介绍了新疆农业生态环境面临的环境污染问题。针对新疆农业生态环境存在的问题,提出了相应的保护措施。 相似文献
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随着RFID技术在各个领域的广泛应用,其面临的电磁兼容问题逐渐显现出来。对RFID中电磁兼容问题的分析是解决RFID中电磁兼容问题的前提。论文首先总结出了RFID系统内部存在的主要电磁兼容问题,然后分析了RFID在应用中产生的辐射问题及它与其他系统之间的相互干扰问题,最后归纳总结出了目前对RFID中电磁兼容问题进行研究的方法,及解决RFID中电磁兼容问题的具体措施。 相似文献
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生物入侵中入侵种与土著种的相互作用 总被引:3,自引:0,他引:3
在全球范围内,生物入侵已经成为一个非常严重的环境问题,并产生了生态问题和经济问题。本文阐述了生物入侵中入侵种自身的变化及对土著种的影响,并讨论了生物入侵过程中入侵种与土著种的快速进化问题。 相似文献
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面对农村生态环境恶化和农村环境污染的突出问题,必须探索出一套行之有效的解决农村环境问题的方法。本文在分析农村主要环境问题的基础上,阐述了搞好农村环境问题的必要性,并且提出了相应的对策。 相似文献
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小城镇建设的作用与出现的环境问题及对策 总被引:4,自引:0,他引:4
小城镇建设在推进社会发展、解决"三农"问题方面发挥了重要作用,但同时也出现了相应的环境问题,如水土流失生态破坏,大气、水体、土壤遭受不同程度的污染.就小城镇建设的作用、小城镇建设过程中出现的环境问题做了探讨,同时针对出现的环境问题提出了相应的对策. 相似文献
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水污染问题是环境保护领域中重要的问题之一,如何高效的利用生物工程技术来解决这一问题已成为环保界普遍重视的问题。本文总结了近年来生物工程在废水净化中的应用现状,并对当前废水净化中生物工程的发展趋势进行了探讨。 相似文献
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Raymond L. Nace 《Journal of the American Water Resources Association》1972,8(1):101-109
Present-day climatic conditions of the Earth were reached between 5,000 and 8,000 years ago. These are essentially the conditions under which the earliest civilizations arose. Ancient basic water problems were the same as those of today, and remarkable technologies for coping with these problems were developed. Few water technologies, except for water treatment, are modern creations. Dry farming began about 8000 B.C. Irrigation began about 5000 B.C. and became extensive by about 3500 B.C., principally in Mesopotamia, the Nile Valley of Egypt, and the Indus Valley of Pakistan. Ancient irrigators developed ingenious structures for obtaining groundwater without the use of wells or sweeps. One device, the Khanat (a kind of infiltration gallery), is still widely used in the Mediterranean area, southwest Asia and China. The khanat was invented during the First Millenium B.C. Ancient peoples also learned to collect surface runoff in areas of scanty precipitation and to use it for local groundwater recharge. The water was recovered from dug wells and used for domestic supply and stock watering. Damming of rivers began at least by the early part of the First Millenium B.C. in the Arabian Peninsula. Most early dams were for irrigation but some were also for city water supply. Many canals in various areas served the dual purposes of water supply and navigation. Soil and water salinity have been persistent problems throughout the history of irrigation and we still have not solved these problems. Irrigation practices were developed independently in the New World but much later than in the Old. North American Indians in some areas still follow the ancient practices. The chinampa system, still used in Mexico, is one of the most intensive methods of farming ever devised. Ancient peoples in the Old World also developed ingenious methods for conserving and increasing soil moisture and for retarding runoff and erosion. During the time of classical Greece and imperial Rome practical water engineering developed to a high degree. Water tunnels, aqueducts, canals, drainage ditches, and dams become commonplace. Even so, water supply and management came relatively late in Europe, where dependence had been largely on natural supply and distribution until the 19th Century. 相似文献
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本文介绍了广东省的自然地理条件,分析了水资源特点,对其开发利用现状、取得的效益和存在的问题进行了探讨,并对进一步开发利用广东省水资源提出了建议。 相似文献
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地质环境与城市可持续发展 总被引:4,自引:0,他引:4
姜建军 《中国环境管理干部学院学报》2002,12(3):5-11
城市建设要处理好人与地质环境的关系,充分考虑地质环境的容量和质量,正确认识地质作用对地质环境的干扰。我国城市地质环境脆弱,地质灾害严重,不合理开发利用地下水诱发了一些环境地质问题,矿山城市地质环境形势严峻。以上问题威胁着城市可持续发展,必须引起高度重视。 相似文献
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和平渠是乌鲁木齐河流经乌鲁木齐市区的人工渠道,存在着严重的安全问题和水污染问题。在已经提出的各种治理方案中,对这两个问题的解决,常常存在着尖锐的矛盾。探讨人工湿地系统在和平渠治理中的具体应用,以期达到既能消除安全隐患又能改善水环境的生态效应。 相似文献
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Kelli L. Larson Robert M. Edsall 《Journal of Environmental Planning and Management》2010,53(3):335-352
To assess changes in human understanding and decision making, the paper examines (1) the influence of visual information on perceptions about groundwater management in Phoenix, Arizona and (2) the correlates and dimensions underlying people's views about water scarcity and mitigation strategies. While perceptions entrenched in ideologies are difficult to change, different types of information (three-dimensional versus two-dimensional) have distinct impacts on the perceived magnitude of problems compared to judgements about their causes and solutions. Overall, visual information may be especially useful for developing a shared understanding of problems and a collective vision for management alternatives. Additional implications of this study for fostering environmental awareness, policy support, and collaborative decision making are also discussed. 相似文献
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Enjie Li Joanna Endter‐Wada Shujuan Li 《Journal of the American Water Resources Association》2015,51(3):589-613
We characterize and compare water challenges confronting the 28 megacities of the world in 2014. Relying on existing literature and diverse primary data sources, we present a unique portrait at a global scale of the water implications of the rapid growth in megacities. We find that differentiating and analyzing the complexity of megacities' water problems based on geographic contexts, historical development trajectories, urban population growth rates, and forms of urban expansion helps explain the nature of the various water management problems they confront. Two governance features also shed light on megacity water challenges: fragmentation resulting from forms of megacity urban expansion; and, urban dualism resulting from contradictions between historical and cultural legacies and the rise of global engineering and technological norms for water management. The increasing vulnerability of megacities to climate change poses risks as well as opportunities for a more collective response to address this global phenomenon. Our analysis raises important questions and offers guidance about the future trajectories of many more large cities around the world that are on their way to becoming megacities. 相似文献