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洱海是大理人民赖以生存和发展的"母亲湖",保护洱海是全州实现可持续发展的前提和基础,保护洱海就是保护大理发展的根基。"治湖先治污,治污先治源"。近年来大理州委、州政府及流域各级农业部门高度重视洱海农业面源污染防治及生态补偿工作,总结、提炼了一些成功的生态补偿经验和做法,特别是在种养结构调整、测土配方施肥、畜禽粪便资源化利用、农产品质量安全、稻田养殖生态鱼等方面实施了大量的以项目形式的生态补偿实践,同时在生态补偿的理论、政策、措施,补偿对象、补偿方式、补偿资金等方面作了初步探索,取得了明显成效,洱海流域农业面源污染控制初步实现了"控源、减排、循环、利用"的目标。本文通过总结大理州近年来以项目形式实施的农业生态补偿机制体制的经验,旨在为保护高原湖泊实施农业生态补偿提供科技支撑。 相似文献
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农田面源污染是洱海富营养化的重要原因之一。本文利用在洱海北部地区收集的实地调研数据,从化肥施用与流失和秸秆利用情况,分析了该地区的农田面源污染现状。结果表明:该地区的农田面源污染主要来源于大蒜田与玉米田的氮磷流失,以及大蒜秸秆与玉米秸秆的焚烧或丢弃。从补偿对象与主体、补偿标准、补偿环节与方式、配套政策四个方面,探讨了农田面源污染控制的补偿政策,并结合在洱海北部地区的实地调研资料,分析了测土配方施肥和秸秆还田两种农田面源污染控制技术采纳的补偿政策案例;提出政府应在基础设施建设、技术指导、教育培训、"无公害"农产品市场建设等方面给予政策支持。 相似文献
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Aibi Lake in north Xinjiang is a typical lake of the arid area, but with a peculiar wetland–arid area ecosystem. Due to the
climate becoming drier and the disturbance of human activities, the eco-environment of Aibi Lake catchment has degraded. It
was found in our study that there were spatial–temporal changes of vegetation cover, plant species, and soil physical and
chemical properties in the catchment. In the upper section of alluvial–fluvial plains, the desertified steppe of Stipa and Artemisia spp. is developed with vegetation cover of some 50%. Haloxylon ammodendron desert occupies the lower section with vegetation cover of some 60%. In these regions with an intensive human disturbance,
vegetation has degraded into herb vegetation of annual plant complexes. On the margins of the alluvial–fluvial fans, the lakeshore,
and the surrounding regions where the river mouths join the lake, different azonal vegetation—Phragmites communis marsh, Phragmites communis meadow, and Tamarix shrubs—have developed with a vegetation cover of some 80%. On heavier, salinized land, succulent halophyte desert vegetation
dominated by Halocnemum strobilaceum has formed with a fractional canopy cover of 10–15%. Haloxylon persicum, Aristida pennata, and other species with a vegetation cover of 30–50% grow in the sand desert zone on the periphery in the lake. In contrast
with the 1950s, the vegetation cover around the lakebed and at the river deltas has slightly increased; however, the vegetation
cover around the periphery of the lake has decreased and the plant species have still degraded. The surface soils on the windward
area and the dried lakebed that have lost vegetation protection have become coarser, whereas the land on the leeward side
of the lake has accumulated fine particles. In contrast with the 1980s, soil organic matter has declined markedly. The analyses
of climatic data show that the number of days of drifting dust in Jinghe County and Bole City increased in the last 20 years.
In the investigation, we found that intensively developed land, the bare lakebed, and abandoned cultivated land provided a
great deal of material for drifting dust. In conclusion, we consider the eco-environmental degradation resulting from the
inappropriate human activities and put forward recommendations for land-use adjustment and dust control. 相似文献
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Policy, Principle, and Practice in Industrial Pollution Control: Views from the Regulatory Interface
There has been much criticism of the system for the control of industrial pollution, but not much is known about the views
of the regulators and the industry. The objective of this study was to explore the attitudes at this regulatory interface
towards the current and proposed regulatory system and make recommendations for improvements. The methodology involved a questionnaire
survey sent to over 700 key personnel. Statistical analysis revealed similarities and significant differences between the
views of industry and the regulator on the effectiveness of the current regime. Weaknesses related to the derivation and enforcement
of standards were identified. The Environmental Quality Standards system was acknowledged to be flawed by both operators and
regulators who agreed it should be improved by the expansion of listed chemicals, the introduction of sediment environmental
quality standards and direct toxicity assessment of effluents. This paper concludes that these measures should be incorporated
into the regulatory system, together with more rigorous enforcement of environmental performance standards including serious
sanctions for non-compliance. In the longer term, a reappraisal of the regulatory system is required in order to establish
an appropriate framework to ensure that environmental policy commitments are implemented. 相似文献
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Katalin Kovari Zaim 《Environmental management》1999,23(2):271-277
10 and SO2 levels to the WHO guideline would have resulted in a total of 48.309 × 1010 and 153.38 × 1010 Turkish lira savings in 1990 and 1993, respectively. These correspond to 0.12% and 0.08% of 1990 and 1993 GDPs, respectively. 相似文献
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广东省近岸海域环境污染现状及防治 总被引:2,自引:0,他引:2
介绍广东省近岸海域的污染现状和发展趋势以及近岸海域的污染途径,主要污染物及污染特性,并对近岸海域环境污染原因进行了分析,提出了近岸海域环境污染的防治对策和要进行的具体研究工作。 相似文献
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/ Land use/land cover classifications for 1973 and 1991, derived from the interpretation of satellite imagery, are quantified on the basis of biophysical land units in a study area in southeastern Australia. Nutrient export potentials are estimated for each land unit based on their composition of land use/land cover classes. Spatial and temporal comparisons are made of the land units based on the calculated pollution hazard indicators to provide an insight into changes in the state of the environment and the regional significance of land use changes. For example, one ecosystem, unique to the study, showed a large increase in pollution hazard over the study period as a manifestation of an 11-fold rise in cleared area and an expansion of cropping activities. The benefits to environmental management in general are discussed.KEY WORDS: Land cover change; Nutrient export; Environmental condition; Pollution hazard; Agricultural pollution; Nonpoint source pollution; Diffuse pollution; Environmental degradation 相似文献
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将四川省农村地区分成平原和浅丘区、小起伏山地和高丘区、高山峡谷区三种类型区域。利用GIS软件,将四川省划分网格,分别统计每个网格中的工业废气污染点源数量和主要交通线路长度,得出四川省工业废气污染点源密度分级图和四川省主要公路密度分布图,以及结合农村污染面源的情况分析,总结出农村区域的主要污染密度分布类型。结果表明,在一定区域范围内,农村平原和浅丘区的工业源、交通源、农村面源分布均匀;高丘区、小起伏山区、高山峡谷区的污染源分布均具有明显的地理分布特性,山间平地和山谷台地的污染源分布密度高;根据四川省污染源分布规律给农村空气自动监测布点提供了指导。 相似文献
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传统的大气污染评价方法是以Pi/Pio为基础,用于特殊环境的大气污染控制存在一定的缺陷,本文提出影响负荷分析法,是建立在大气污染物输送扩散的基础上的,并用以研究峨眉山风景保护区大气污染控制的对策,其结论更为科学合理。 相似文献
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根据阿克苏地区工业污染源排放现状及特点,分析了阿克苏地区环境监督管理工作中存在的问题,从提高环境监管力度、"三同时"制度管理水平、在线监控能力、优化产业结构等方面提出了相应的对策和建议。 相似文献
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The Patagonian coast is considered a relatively pristine environment. However, studies conducted along coastal Patagonia have
showed hydrocarbon pollution mostly concentrated at ports that have fishing, oil loading, general merchant, and/or tourist
activities. A high value of total aliphatic hydrocarbons (TAH) was found at the Rawson fishing port (741 μg/g dw). In other
ports with and without petroleum-related activities, hydrocarbon values were approximately 100 μg/g dw. The highest values
for TAH and total aromatic hydrocarbons (TArH) were found in Faro Aristizábal, north of San Jorge gulf (1304 and 737 μg/g
dw, respectively). This is very likely the result of petroleum-related activities at the Comodoro Rivadavia, Caleta Cordova,
and Caleta Olivia ports located within this gulf. In other coastal areas away from potential anthropogenic sources, hydrocarbon
values were less than 2 and 3 μg/g dw for TAH and TArH, respectively. This review of published and unpublished information
suggests that ports are important oil pollution sources in the Patagonian coast. More detailed studies are needed to evaluate
the area affected by port activities, to understand the mechanisms of hydrocarbon distribution in surrounding environments,
and to assess bioaccumulation in marine organisms. Despite that some regulations exist to control oil pollution derived from
port and docked vessel activities, new and stricter management guidelines should be implemented. 相似文献
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国控重点污染源监督性监测质控抽测工作的思考 总被引:1,自引:0,他引:1
简述了开展国控重点污染源监督性监测质控抽测的内容。指出,目前国控重点污染源监督性监测中尚存在的问题,部分采样平台和监测断面设置不符合技术规范,监测仪器与监测方法不统一,监测数据的可比性不强,监测能力建设没有完全到位,现场仪器使用导致监测结果偏差。提出,加强手工监测全过程质控工作,配备精度较高的污染源现场监测仪器,加强污染源现场监测技术和仪器设备技术标准的研究,加强企业排污口规范化建设,加强污染源监测数据可信度评分办法等的研究,进一步推动污染源监测工作,使得污染源监测数据更好地反映污染源排放的实际情况,为管理部门提供准确的监测数据。 相似文献
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结合第一次全国污染源普查的统计数据,本文利用等标污染负荷法对深圳市35个二级行业排放的12种污染物进行评价,结果表明,深圳市54.90%的工业污染源分布在通信设备、计算机及其他电子设备制造业,金属制品业,塑料制品业,专用设备制造业,电气机械及器材制造业这5个行业中;深圳市二级行业的等标污染负荷最大的5个行业为:金属制品业〉通信设备、计算机及其他电子设备制造业〉电气机械及器材制造业〉塑料制品业〉仪器仪表及文化、办公用机械制造业,这5个行业中最严重的污染物均为氰化物;工业污染源排放的12种污染物中,最严重的5种污染物为:氰化物〉六价铬〉总铬〉汞〉铅,其中氰化物、六价铬、总铬这3种污染物中最严重的污染行业均为金属制品业,汞、铅这两种污染物中最严重的污染行业均为通信设备、计算机及其他电子设备制造业。 相似文献