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新疆草地退化及其治理 总被引:3,自引:0,他引:3
草地退化是新疆草地面临的突出问题。在分析新疆草地生态环境退化现状的基础上,提出了治理对策,指出只有合理的开发利用草地资源,才能使新疆的草地资源优势真正转化为经济优势,实现新疆畜牧业的可持续发展。 相似文献
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本文应用遥感技术,探讨了巴颜喀拉山北坡-青海省达日县段高寒草地资源及其退化高山草甸草地的成因、分布和判断标志将研究区划分为5个草地类型和3个退化草地型,重点分析了高山草甸草地退化的主要原因和影象特征。 相似文献
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长江上游流域生态与可持续发展对策 总被引:2,自引:0,他引:2
概述了长江上游流域生态环境退化的现状和急需解决的问题,分析了生态环境退化的人为驱动因素和生态建设存在的问题,在此基础上提出了将长江上游作为一个流域整体进行跨地区、跨部门、跨学科的大联合攻关,强调“快速、经济、参与”为指导思想和原则,突出重点生态类型区域,开展关键技术试验示范攻关,发展以资源导向为主的区域经济,从而实现“近期遏制恶化,中期治理恢复,最终持续发展”的分阶段目标。 相似文献
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山东滨海旅游资源开发及其问题 总被引:2,自引:1,他引:2
"海上山东"发展战略的实施,促进了山东省旅游业的快速发展.结合山东省滨海旅游业发展的实际情况,分析了该省滨海旅游资源的特点、旅游业发展现状、存在问题和发展潜力,针对性地提出了综合开发利用旅游资源,发展山东省海滨旅游区的战略设想和对策. 相似文献
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山东蓬莱的滨海旅游资源 总被引:3,自引:0,他引:3
从蓬莱海洋自然资源、海洋人文景观、海洋文化信仰几方面对蓬莱滨海旅游资源进行了分析,提出了对蓬莱滨海生态旅游资源开发的策略,从沙滩旅游、海洋生物生态旅游、海洋旅游纪念品、海洋历史事件开发的角度阐述了作者的观点. 相似文献
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新疆土地退化严重,对生态环境的危害日益加深,其中草地退化导致畜牧业长期不能很快发展,林地萎缩严重危及绿洲灌溉农业,耕地衰退造成粮食单产长期不能很快提高.遏制并逆转土地退化是当前发展农业生产的重大课题,其主要措施是:1.以治水改土为中心,搞好流域规划,建立绿洲生态系统的良性循环,2.以植树种草为基础,建立绿洲林网结构,逆转耕地沙化,3.以农田基本建设为前提,综合治理盐碱地,改造低产田. 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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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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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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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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燃煤二氧化硫控制技术应用概况 总被引:1,自引:0,他引:1
由燃煤引起的二氧化硫污染已成为大气环境中最主要的污染因子。为解决这个问题,我国结合国外的技术成果,进行了各种脱硫技术的研究。介绍了各种治理技术应用情况,并结合实际经验对其中应注意的问题给予评述。 相似文献