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641.
崇明东滩候鸟自然保护区的动态变化 总被引:4,自引:0,他引:4
在80年代末期的鸟类及其生境调查研究基础上,正式提出拟建的上海市崇明东滩候鸟自然保护区,5年来随着滩涂的游涨及90年代初期人工围垦的影响,滩涂自然植被和鸟类的种类,数量,分布也随之有了相应的相应的动态变化。该文在新的调查资料基础上,对崇明东滩鸟类赖以生存地自然植被恢复,候鸟食料的容量分析等作了研究;同时,还论述了崇明候鸟自然保护区的界线范围及其动态变化,以及保护区内部3个功能小区的动态等。 相似文献
642.
县级生态示范区建设模式的探讨 总被引:1,自引:0,他引:1
通过对吴县市自然、社会、经济、环境等方面的分析,提出吴县市生态示范区建设的目标、具体指标及生态产业建设框架。重点探讨了适应吴县经济发展的生态农业、生态工业、生态生产、生态旅游及露采矿区生态恢复建设的基本模式。 相似文献
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Karimov Bakhtiyor Lieth Helmut Kurambaeva Mohira Matsapaeva Irina 《Mitigation and Adaptation Strategies for Global Change》2005,10(1):87-103
The main objective of this paper is the presentation of water scarcity and water quality problems of fishery and fishermen in the southern Aral Sea region Kazakhstan. We tried in the past to inform interested people about our suggestions how to rehabilitate the situation, how to produce relatively enough fish for the functioning of local fish processing industry and to give people jobs, but we were unable so far to convince decision makers about innovations needed. It is essential therefore to reiterate some of the well-known problems of the region, called the Aral Sea crisis, but we concentrate mostly on the problems for the fishermen. While we do this, we understand, however, that the problem requires solution within the concept of a socioeconomic sustainable development for which we suggest the development of a decision support system based upon a computer simulation model providing optimal solutions. 相似文献
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低层大气中固体粒子运动及其物理模拟 总被引:14,自引:0,他引:14
对于大气边界层中的固体粒子的风致运动-较大粒子的蠕动跃动和较小粒子悬浮-的主要特征作了介绍,着重介绍了在悬浮粒子运动的物理模拟研究方面的一些成果;复杂地形物低层大气湍流会显地提高起尘速率并改变降尘量的分布;有一定我向厚度的风障除了屏蔽效应--即背风侧平均风速的减小--外,还滕了终进入空气的灰尘数量的“宏观吸附效应”;总结了模拟悬浮粒子运动的风洞实验所应遵循的相似性准则,并提出了模拟防尘风障的中的 相似文献
649.
Rizaldi Boer Upik R. Wasrin Perdinan Hendri Bambang D. Dasanto Willy Makundi Julius Hero M. Ridwan Nur Masripatin 《Mitigation and Adaptation Strategies for Global Change》2007,12(6):1169-1188
Rehabilitation of degraded forest land through implementation of carbon-sink projects can increase terrestrial carbon (C)
stock. However, carbon emissions outside the project boundary, which is commonly referred to as leakage, may reduce or negate
the sequestration benefits. This study assessed leakage from carbon-sink projects that could potentially be implemented in
the study area comprised of 11 sub-districts in the Batanghari District, Jambi Province, Sumatra, Indonesia. The study estimates
the probability of a given land use/cover being converted into other uses/cover, by applying a logit model. The predictor
variables were: proximity to the center of the land use area, distance to transportation channel (road or river), area of
agricultural land, unemployment (number of job seekers), job opportunities, population density and income. Leakage was estimated
by analyzing with and without carbon-sink projects scenarios. Most of the predictors were estimated as being significant in
their contribution to land use cover change. The results of the analysis show that leakage in the study area can be large
enough to more than offset the project’s carbon sequestration benefits during the period 2002–2012. However, leakage results
are very sensitive to changes of carbon density of the land uses in the study area. By reducing C-density of lowland and hill
forest by about 10% for the baseline scenario, the leakage becomes positive. Further data collection and refinement is therefore
required. Nevertheless, this study has demonstrated that regional analysis is a useful approach to assess leakage. 相似文献
650.
Globalisation trends in economy and governance have resulted in a change in policy instruments towards harmonised initiatives, which are considered to a great extent pivotal for countries to engage with. ISO14001 is seen as constitutive of these wider concepts and is the focus here in explaining their diffusion in national contexts.This article questions the extent to where the adoption of ISO14001 in Greece is motivated by environmental sustainability or processes of economic globalisation. It indicates that in order to facilitate progress towards sustainability through environmental management, proper institutional arrangements and a legal framework must be established and executed by the government and society at large. 相似文献