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1.
Environmental implications of changes in the levels of lakes in the Ethiopian Rift since 1970 总被引:1,自引:0,他引:1
The Ethiopian rift is characterized by a chain of lakes of various sizes and hydrological and hydrogeological settings. The rift lakes and feeder rivers are used for irrigation, soda extraction, commercial fish farming, and recreation, and they support a wide variety of endemic birds and wild animals. The levels of some of these lakes have changed dramatically over the last three decades. Lakes that are relatively uninfluenced by human activities (Langano and Abaya) remain stable except for the usual inter-annual variations, strongly influenced by rainfall. Some lakes have shrunk due to excessive abstraction of water; others have expanded due to increases in surface runoff and groundwater flux from percolated irrigation water. Lakes Abiyata and Beseka, both heavily impacted by human activities, show contrasting lake level trends: the level of Abiayata has dropped by about 5 m over three decades because of the extraction of water for soda and an upstream diversion for irrigation. Beseka has expanded from an area of 2.5 to 40 km2 over the last three decades because of increased groundwater inputs from percolated irrigation water. Lake Awassa has risen slightly due to land use changes resulting in increased runoff in its catchment. This paper addresses these lake level changes and their environmental repercussions, based on evidence from hydrometeorological records, hydrogeological field mapping supported by aerial photography and satellite imagery interpretations, water balance estimation, and hydrological modeling. A converging evidence approach is used to reconstruct the temporal and spatial variations of lake levels. The results reveal that the major changes in the rift valley are mainly related to anthropogenic factors. These changes appear to have grave environmental consequences for the fragile rift ecosystem. These consequences demand the very urgent implementation of integrated basin wide water management practice. 相似文献
2.
面源污染中畜禽有机肥磷的流失形态及其环境效应 总被引:1,自引:0,他引:1
磷是作物生长所需的大量元素之一。同时在水体富营养化形成过程中也起着决定性作用。畜禽有机肥磷作为作物生长所需磷的来源之一,近20年来,随着集约化养殖业的不断发展。畜禽有机肥磷的产生量也在相应增加.引起了磷在养殖区域附近的土壤中富集,增加了磷的流失风险。目前,有关畜禽有机肥磷如何引起面源污染研究越来越多。本文回顾了畜禽有机肥磷的形态及其分析方法、磷的含量和衡量磷流失能力的标准、控制磷流失的技术措施等研究进展,对不同方法标准进行了比较.提出我国在现有畜禽有机肥控制管理措施的基础上,开展畜禽有机肥磷流失的相关基础研究以控制畜禽有机肥磷对水体质量的影响。 相似文献
3.
Watersheds provide a variety of ecological services including soil and water conservation, carbon sequestration and biodiversity protection. However, activities in a fast-growing economy significantly impact the supply and demand of these watershed services. To mitigate these impacts, the concept of payment for environmental and ecosystem services from watersheds has emerged in global academic and policy circles. The governments and academic communities in China have increasingly described payments for ecological services from watersheds with the concept of watershed eco-compensation as it is urgent to protect watershed ecosystems. Watershed eco-compensation has proved to be one of the most economically effective means of solving environmental problems of watersheds to be adopted by the Chinese government. This paper presents an objective analysis of the Chinese market for watershed ecosystem services, including supply and demand for the services. It also summarizes Chinese policies on watershed eco-compensation, including relevant laws and regulations and fiscal policies. In addition, it presents a review of Chinese practices in watershed eco-compensation, including the analysis of an ecological construction project in Western China, inter-provincial watershed eco-compensation practices and plans, and payment for ecological services at the provincial and small watershed levels. Finally, it summarizes the key components of the process of payment in Chinese watershed eco-compensation. This discussion forms the basis of concluding suggestions for ecosystem services compensation and ecological protection in the large scale river basin. 相似文献
4.
中国畜禽温室气体排放时空变化及影响因素研究 总被引:4,自引:0,他引:4
畜禽业是关系国计民生的重要产业,在满足居民生活物质需求的同时,其生产过程中所伴随的温室气体排放问题已成为不容忽视的环境问题。本文基于LMDI模型系统分析了1991-2013年中国畜禽温室气体排放时空变化及其因素贡献。结果表明:1从时间维度来看,1991-2013年,中国畜禽温室气体排放经历了先快速上升后稳定上升再波动下降的变化特征,总体呈上升趋势。经济效应对畜禽温室气体排放促进作用最大,而强度效应的抑制作用最大,其次是劳动力效应和结构效应。2期间,经济效应促进作用的累计贡献呈指数增长,而强度效应抑制作用的累计贡献呈倒"U",劳动力效应和结构效应抑制作用也不断加强。3从空间维度来看,中国畜禽温室气体排放的区域集中度较高,四川、河南、山东、云南和内蒙古等省(区、市)畜禽温室气体排放一直位居全国前列。4省域各效应作用方向和程度差异显著,四川、青海和云南强度效应抑制作用较大,辽宁、吉林和黑龙江抑制作用较小;山东、四川和黑龙江结构效应抑制作用显著,新疆和青海促进作用明显;四川、河南、内蒙古、山东、云南、湖南和河北经济效应促进作用较大,天津、上海、海南和北京促进作用较小;四川、湖北、江苏和山东劳动力效应抑制作用显著,新疆、黑龙江和内蒙古促进作用明显。最后,基于研究结论,为未来中国畜禽温室气体减排空间发展策略提出了几点建议。 相似文献
5.
《International Journal of Sustainable Engineering》2013,6(4):344-351
The pharmaceutical industry traditionally uses complex batch-type processes in the manufacture of medicines, although the production of specific medicines by continuous processes is currently envisaged. Due to the diversity of these processes, it is difficult to define a general set of waste prevention guidelines that would apply to all drug manufacturing. The most applicable methods of prevention can, however, be delineated for each of the five steps in the pharmaceutical manufacturing, i.e. (i) research and development, (ii) chemical synthesis, (iii) natural product extraction, (iv) fermentation and (v) product formulation. Waste streams generally arise from cleaning and sterilising equipment, chemical spills, rejected by-products and the processes themselves. Prevention mainly involves waste reduction by materials substitution, process modification/optimisation, waste stream segregation and solvent waste recycling. These measures are assessed and lead to guidelines for waste minimisation methods according to the waste streams under scrutiny. 相似文献
6.
7.
Dennis D. Mwanza 《Environment, Development and Sustainability》2003,5(1-2):95-115
Water is a precious yet non-renewable resource. Yet in Africa, the same water can be a source of life and death. Water is not only the most basic of need but also at the centre of sustainable development and essential for poverty eradication. Water is intimately linked to health, agriculture, energy and biodiversity. Without progress on water, reaching other Millennium Development Goals (MDGs) will be difficult if not impossible. The fight against poverty will remain a pipe dream.A lot of activities have been undertaken with the aim of highlighting the importance of water, linking water with sustainable development and indeed developing strategies for resolving the ever-increasing problems of water. These include the adoption of the Africa Water Vision in The Hague, Netherlands in March, 2000.In order to address the many problems of water in Africa especially related to the coordination of the increasing number of initiatives in the Water sector in Africa, the African Water Task Force (AWTF) was established.As part of developing solutions to the African water crisis, the AWTF held a regional conference in Accra Ghana. Some of the emerging issues from the Accra Conference are highlighted in the Accra declaration.This paper highlights the linkages between water and sustainable development, water and poverty and the many facets that relate to water. It mainly addresses issues of water from the African perspective. A number of key events that have taken place and which have served as a basis for many policy pronouncements have been given.The last section concentrates on what happened to water at the World Summit for Sustainable Development (WSSD) held in Johannesburg in September 2002. 相似文献
8.
Z. J. U. Malley M. Taeb T. Matsumoto H. Takeya 《Environment, Development and Sustainability》2008,10(3):349-372
In Africa, the land and water resources quality are key factors for sustainable development. The degradation of the quality of these resources leads to scarcities and conflicts, which together threaten the sustainability of rural livelihoods. This work investigated and analysed the livelihoods conflicts over the land and water resources and their scarcities, policies that contributed to the land and water scarcities and the livelihood conflicts and linkage of the conflicts to the resources scarcities and degradation. Implications of degradation of the resources, development policies and livelihoods conflicts on sustainable development are discussed. Literature study, visits and discussions, participatory assessments, observations and questionnaire survey were used tools to collect data. Interviews of the 266 households revealed that, those experiencing the land and water scarcities and conflicts over these resources are significantly (p < 0.001) higher than those not experiencing the scarcities and conflicts. Crop-livestock competition, over the land and water resources causes prominent conflicts. A significant, (p < 0.05) associations of livelihoods conflicts to water shortage and period of water shortage for crop and livestock production were found. Improved accessibility to soil and water management technologies, wildlife–livestock co-existence, recognition of needs and land rights for pastoralists are recommended to minimize scarcities and herders versus farmers’ conflicts. 相似文献
9.
István Láng 《Environment, Development and Sustainability》2003,5(1-2):167-178
The paper gives an overview on the transformation process of 10 Central and Eastern European (CEE) countries leading to a change of political structure and the emergence of market mechanisms. These countries intend to get admission into the European Union (EU) in the near future. Therefore, the legal system of the EU is the standard for them and, in particular, they follow the respective environmental protection measures.The implementation of sustainable development is a new challenge for the CEE countries. Beside environmental protection, economic and social dimensions are also to be considered, and these three pillars are in mutual interaction. In the CEE countries, the preparations to implement elements of sustainable development began in the last few years. Thus, the documents of the Johannesburg Summit on Sustainable Development stimulate this recent process. The successful implementation requires the close cooperation of the governments, the various stakeholders and the civil society. 相似文献
10.
Transportation is a sector with high energy consumption as well as high emissions. Generally speaking, economic growth will inevitably lead to the increase of travel demand and vehicle population, which in turn results into the augmentation of environmental and social costs. For metropolis like Beijing under rapid development, there exist various possibilities and options for transport development policy instruments. But there is no guarantee that they will be suitable for Beijing, although they are effective in their local places. This article assesses what kind of policy can most effectively improve the traffic conditions in Beijing in the future. After literature reviews on the practices of foreign policy and we established several feasible scenarios. Then, we used the Long Range Energy Alternatives Planning System (LREAP) analyzed their corresponding results of reduced energy consumption and emissions. Finally, by simulating and computing the realistic Beijing transportation scenarios, this paper scientifically assesses what kind of policy can most effectively improve the traffic condition in Beijing in the coming decade. 相似文献
11.
Herwig Peeters 《Environment, Development and Sustainability》2003,5(1-2):197-230
The incapacity to finance sustainable development through philanthropic official assistance turned the Johannesburg Summit to business world and the financial industry. Pioneering financial institutions – including development banks and private banks – have developed a wide range of innovations that can support sustainable development. This article highlights a few innovative products and markets and focuses on the progress made by financial players on the level of standards, metrics and guidelines to improve sustainability management systems, reporting and accounting practices and the multi-stakeholder dynamic. The role of the socially responsible investing (SRI) community has been underexposed by the Summit. Through its voice and market success, SRI has moved from a green market niche to the mainstream, however not becoming mainstream. The invaluable levering effect of SRI has just been discovered by authorities and market regulators and is becoming instrumental. In order to show the business case of Corporate Social Responsibility and to prove the financial viability of the People, Planet, Prosperity investing approach, the SRI community should critically reflect on its own quality assurance systems, sound disclosure and verification practices. 相似文献
12.
地方政府推进循环经济发展的局限性及对策研究——以山东省日照市为例 总被引:1,自引:0,他引:1
李兆前 《中国人口.资源与环境》2006,16(6):182-187
在分析日照市发展循环经济的路径、措施和难题的基础上,研究了地方政府的自利性、选择性偏差、调控手段和行政分割等方面的局限性,提出了规范中央政府和地方政府关系、构建科学的政绩考核体系、加强区域分类指导、加快立法与强化执法、制定相应的经济制度与政策等发展循环经济的建议。 相似文献
13.
我国农业与农村可持续发展的核心问题是农民收入问题。只有切实提高农民的收入水平。才能有效地增加农民购买力,从而增加农业生产资料的投入。进而保证粮食增产。我国农业与农村可持续发展存在的两个矛盾是小农经济与市场经济社会化的矛盾以及小农经济与科技化之间的矛盾。面临的两个分离是家庭经济与集体经济的分离以及传统供销合作社与农民利益的分离。增加农民收入的规模经济论与乡镇企业论的确有成功的典范.但是。对我国更多的农村地区来讲.不具有普遍意义。我国农业和农村可持续发展的关键有两个.一是符合区域特色的区域农业专业化.二是通过专业合作社的制度创新.将分散的家庭组织起来.以解决家庭小生产与大市场之间的巨大矛盾。 相似文献
14.
G. V. Zheleznova E. G. Kuznetsova T. V. Evdokimova L. P. Turubanova 《Russian Journal of Ecology》2005,36(4):243-248
Vegetation development and changes in the characteristics of the substrate in technogenically disturbed sites in the Usinskoe oil field were monitored for ten years (1992–2002). It has been demonstrated that 86 species of vascular plants and 12 species of bryophytes constitute the vegetation formed on fill-up soils during the first stages of recovery succession. A succession of dominant species was observed in the tenth year of monitoring. Differences in plant composition on the ground surface of different technological zones of plots located in different landscapes are described.__________Translated from Ekologiya, No. 4, 2005, pp. 269–274.Original Russian Text Copyright © 2005 by Zheleznova, Kuznetsova, Evdokimova, Turubanova. 相似文献
15.
中国西部能源及矿业开发与环境保护协调发展研究 总被引:4,自引:0,他引:4
中国西部地区自然环境脆弱且恶劣,但能源及矿产资源分布相对集中,能源及矿业开发已经成为其经济社会发展的支柱产业.本文力图从西部能源及矿业开发与环境保护协调发展、促进资源开发与生态保护的视角,综合辨析出西部地区能源及矿业开发引发的地质环境及生态环境恶化问题,主要包括土壤污染与土地破坏、水资源污染与短缺、矿区大气污染、噪声污染以及采矿诱发的各类地质灾害和生态环境破坏等.文章认为:西部地区矿产资源和能源开发等人为因素引发的地质环境及生态环境恶化问题日益突出,增强西部地区可持续发展能力,确保资源开发与环境保护的协调发展是西部地区提高能源资源保障能力的现实选择,也是转变发展方式、建设“两型”社会的必然要求.为此,本文对西部地区能矿资源开发与环境保护的协调发展提出了相关建议,主要包括:大力推行绿色发展,极开发绿色新能源;加强资源管理与污染控制,建立、健全矿产资源开发环境保护相关法律法规和体系,健全生态补偿机制;通过市场准入制度设立绿色门槛,继续整合小矿山;加强西部资源型城市与沿海地区的区域融合,减少资源开发的负外部性,破除“资源诅咒”;借鉴国际上“责任矿产开发倡议”,提高能源及矿产资源开发利益相关者的参与能力;统筹协调资源税费、地方发展基金,明确资源税的调节作用,健全利益分配机制,设立绿色发展基金;加强能矿资源开发全过程的第三方独立监管,在能源及矿产资源开发过程中实行有效透明的监管等. 相似文献
16.
人文发展的基本需要分析及其在国际气候制度设计中的应用——以中国能源与碳排放需要为例 总被引:2,自引:0,他引:2
人文发展的基本需要途径从满足基本需要和限制奢侈浪费性排放出发,充分利用技术在实现低碳发展方面的潜力,保障气候目标的实现和代内与代际公平。本文在讨论发展所面临的消除贫困、城市化和工业化挑战的基础上,区分了生存水平和体面生活水平的基本需要,依据国际数据和科学研究成果,对基本需要进行了量化界定。并在此基础上,对满足13亿中国人体面生活水平的基本需要的能源和排放含义,进行了案例研究。最后探讨了基本需要途径在国际气候制度设计中的应用和前景。 相似文献
17.
孙新章 《中国人口.资源与环境》2016,(1):1-7
2015年联合国发展峰会通过了“2030年可持续发展议程”,这是一幅由全世界所有国家共同描绘的未来发展蓝图.联合国制定该议程的内在原因有两个,一是为了完成千年发展目标的未竟事业,二是为了汇聚国际社会力量共同应对新的全球性挑战.“2030年可持续发展议程”将重塑当今的全球可持续发展治理体系,为发展中国家深入参与全球可持续发展治理提供了机遇,也有利于全球可持续发展走出“气候变化泥潭”.但是,该议程也存在不足,主要体现在一些可持续发展目标相互重复和难以量化、没有对不同类型国家给出建议、以及里约原则被弱化等.“2030年可持续发展议程”对中国未来发展既是机遇也是挑战.机遇主要体现在有利于中国在可持续发展领域开展对外合作和“一带一路”战略的实施,挑战主要体现在中国将面临来自国际社会的“三重压力”.面向未来,中国应在坚持发展中国家的基本定位下,积极、主动参与相关进程.从对内看,应在该议程框架下根据中国的国情制定“2030年中国可持续发展议程”,并建立有利于产业界、地方政府、民间团体等参与的机制,在实现议程中创造新的经济增长点和就业机会;从对外看,应在坚持“力所能及、互惠互利”原则下,积极开展国际发展合作和发展援助,为其他发展中国家实现该议程做出中国贡献. 相似文献
18.
ABSTRACTGlobal environmental cooperation serves as an important part in the Chinese ideal of building a Community with a Shared Future for all Human Beings. The report of 19th CPC National Congress indicates that China is committed to proactive mitigation under the Paris Agreement and further participating in global environmental governance under the 2030 Agenda for Sustainable Development, and both of which are largely integrated to the Belt and Road Initiative (BRI). BRI are also closely linked with South–South environmental and climate cooperation proposed by China from previous UN summits. Based on shared ideas, intersected agendas, and compatible governance approaches, BRI and the 2030 Agenda for Sustainable Development grow increasingly relevant and they might form synergies based on increasingly interactive relations. In sum, seeking and intensifying the linkages between BRI and 2030 sustainable development goals (SDGs) could address global environmental governance deficits and enhance cooperation among nations. 相似文献
19.
Huang Kunming Fu Xiaofeng Chen Changjie 《中国人口.资源与环境(英文版)》2007,5(3):57-62
Currently, the progress of science and technology has become a key factor in promoting economic development. And the backwardness of science and technology at the grassroots level has undoubtedly restricted the process of China's construction of socialist new countryside. Taking socio-economy and the development of science and technology in Jiaxing as a breakthrough point, and based on the related data of Jiaxing during 1998-2004, this paper analyzes thoroughly the interactive relationship between socio-economy and the development of science and technology. This paper strives to summarize the development track and model of the grassroots work of science and technology so as to provide local governments with references and grounds for drawing up policies for the local work of science and technology. 相似文献
20.
Abstract In recent years, with the rapid development of the tourist industry, world heritage sites become more and more popular among tourists from home and abroad. Therefore, heritage tourism has become a new hotspot. However, while world heritage sites are making obvious economic benefit from tourism, they also bring various problems and contradictions, of which the most troublesome one is the contradiction between heritage conservation and tourism development. To discuss and analyze the root and the essence of the above contradiction and find a way to bring about harmony between them is an important program faced by our national heritage management practice and academic research. Based on the case of cleaning the Temple and Cemetery of Confucius and the Kong Family Mansion in Qufu, this paper analyzes the reasons why our national world cultural heritage sites bring about the above contradiction in the process of tourism development and points out that the improper system and stakeholders' benefit imbroglio are respectively the root and the essence of the contraction. Then, it also puts forward corresponding solutions. 相似文献