共查询到18条相似文献,搜索用时 57 毫秒
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人为纵火、林区吸烟、施工用火、闪电、林区建筑物以及不合理的城市森林规划等是城市森林火灾发生的重要隐患,常常导致城市森林火灾的发生,给城市居民的生命和财产造成了巨大的损失。加强对城市森林火灾发生原因的研究,合理规划城市森林布局和结构,加强对火灾隐患的管理,减少城市森林火灾的发生,是维护城市生态可持续发展的必然要求。
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欧洲城市森林及城市林业 总被引:5,自引:2,他引:3
文章介绍了欧洲主要国家及城市的城市森林概貌。目前关于城市林业的理解,不同国家的观点不同,但基本同意城市林业是一个综合体、是综合性的学科;城市林业目的在于为城市树木资源建立长期的政策与规划;强调城市森林能够提供的经济、环境、社会-文化产品及服务;是一项需要公众参与的事业。
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城市森林与城市森林游憩 总被引:5,自引:2,他引:5
城市森林游憩可分为两类,即日常性游憩与专题性游憩;提出要发展郊区城市森林以及建设郊野游憩带的概念,为城市居民提供更能亲近自然的游憩活动机会;必须通过合理规划、建设与调整,建设森林型的生态廊道、公园路,为城市内部与郊野的城市森林建立有机联系;指出把公众参与、全社会的认同与协调作为实现城市森林可持续发展目标的主要内容。
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包头市城市森林绿地树种选择及效果评价 总被引:6,自引:0,他引:6
以包头市东河区、青山区、昆都仑区、九原区、开发区等五个城区中公园、行道、游园、小区、厂区、防护带等景观类型中树种和群落为调查对象,利用植物物种数、丰富度、多样性指数、重要值等指标对包头市城市绿地植物群落进行调查,用层次分析法评价,对包头市城市绿化树种现状进行分析。针对出现的问题提出在今后城市绿化树种增加种类增加层片和季相,提高绿化的稳定性及不同时间的观赏要求,加大对乡土树种的开发和应用,提高适应性,以减少经济造价。
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加快城市林业发展 创建国家森林城市 总被引:1,自引:1,他引:0
1999年,广州市委、市政府提出了"两个适宜"的现代化大都市发展目标,即"适宜创业发展"和"适宜生活居住",明确把它写进了"十五"计划。为此,全市大力进行生态环境建设,把林业作为重要的有生命的绿色城市基础设施来建设,不断深化对林业定性定位的认识,不断增强林业服务城市生态建设和经济社会环境可持续发展的功能作用。
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中国城市森林建设的理论与实践——绿色江苏的城市森林建设 总被引:5,自引:0,他引:5
本文在系统阐述中国城市森林发展的思路、理念、措施等问题基础上,并以江苏为例对城市森林建设规划进行了具体研究,以期为中国城市森林的发展提供帮助。
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Historical forest fire records from Alaska State (1950–2000), California State (1895-2001), USA and Heilongjiang Province
(1980–1999), China were used to calculate the longitude and latitude of the annual burned area’s centroids for these regions.
Fluctuation phenomena by year were analyzed using spectrum analysis. The results show that centroids of burned areas in these
three regions are in a fluctuating condition that encircles the distribution center. The distribution centers are 151.11°W,
64.96°N in Alaska State, 120.02°W, 37.11°N in California State and 127.07°E, 49.59°N in Heilongjiang Province, respectively.
The fluctuation of the burned area’s centroids in Alaska State and California State in longitude has obvious periodicity,
and the periodicities are 4.2 years, 6.25 years in Alaska State and 6.24 years, 106 years in California State. The fluctuation
of the burned area’s centroids in Heilongjiang Province has a periodicity both in longitude and latitude, and the periodicities
are both 3.3 years, 6.67 years. Fluctuation of the burned area’s centroids in Alaska State and California State in latitude
does not have periodicity, and big forest fires with low frequencies predominate.
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Translated from Scientia Silvae Sinicae, 2006, 42(5): 89–103 [译自: 林业科学] 相似文献
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文章阐述广东省乳阳林业局(南岭国家级自然保护区、南岭国家级森林公园)在遭遇百年冰雪灾害后,林区95%林木严重受损的大面积倒木和断枝现状,分析了冰雪灾害造成乳阳林区存在的长期严重林火隐患的主要问题,提出了预防和扑救森林火灾的对策,对今后保护南岭森林资源和粤北林区的森林防火安全有重要的指导作用。 相似文献
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文章根据广州市600例火灾资料,总结出以水灭火是其最有效的灭火方式,还对防火队伍、设备、演练及联防等保障机制建设作了全面介绍。
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How are extreme events understood in the forest sector? What are the implications of forest professionals' understandings and evaluations of extreme events? These questions are central to this study, which analyses the handling of the largest forest storm and the largest forest fire in modern Swedish history. The theoretical approach is that of risk governance in practice, which stresses that understanding the framings, practices and strategies used by members of professional organizations is pivotal for how disasters are managed. Two interview studies have been conducted with forest professionals involved in the two cases. The analysis shows that there were fundamentally different understandings of the two events and their implications for forestry practice. The storm was seen as an unavoidable natural disaster, but the consequences of future storms were considered possible to mitigate through changed forest practices. The forest fire, on the other hand, was conceptualized as a partly natural and partly man-made disaster, and forestry was seen as having very limited possibilities to reduce the likelihood as well as the consequences of similar events. The different understandings had significant implications for the post-disaster dynamics and for which management practices that were developed. Thus, understanding how extreme events are perceived is crucial to understanding which management practices that emerge in their wake, a topic of growing relevance because climate change is predicted to increase the frequency of forest fires and storms. 相似文献