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valley environmental
相关语句
  流域环境
     The Ganjiang Valley Environmental Ecology Database Based on GIS
     基于GIS的赣江流域环境生态数据库的建立
短句来源
     At present, the GIS technology is widely used in resources management,environmental monitoring, environmental assessement, diaster evaluation, region valley environmental programme and other domoins and has become a support tool of effective policy-making for environmental management both at home and abroad.
     目前,GIS技术已广泛用于资源管理、环境监测、环境评价、灾害评估、区域流域环境规划等众多领域,已成为国内外环境管理的有效决策支持工具。
短句来源
     The paper introduces the current situation of the Jiulong River basin environment and analyzes the problem of the water environmental protection in view of the comprehensive improvement of water pollution and ecocide of river basin. And then advances some countermeasures in order to strengthen the valley environmental protection in the tenth five year plan.
     该文介绍了九龙江流域环境现状 ,并针对流域水污染与生态破坏综合整治 ,分析水环境保护面临的问题 ,提出“十五”期间加强流域环境保护的对策建议
短句来源
  相似匹配句对
     THE ENVIRONMENTAL EVOLUTION OF THE YANGTZE RIVER VALLEY
     试论长江流域自然环境的演化
短句来源
     ANALYSIS THE WATER ENVIRONMENTAL CAPACITY OF THE LUODING VALLEY
     罗定江流域水环境容量分析
短句来源
     On the Environmental Security
     生态环境安全研究
短句来源
     On Environmental Philosophy
     论环境哲学
短句来源
     Beauty valley
     "梅花"盛开美人谷
短句来源
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Geographical information system (GIS)is gethering computer science,Earth , s science and information science as an organic whole of high-new technology.At present, the GIS technology is widely used in resources management,environmental monitoring, environmental assessement, diaster evaluation, region valley environmental programme and other domoins and has become a support tool of effective policy-making for environmental management both at home and abroad.The article introduces GIS technology applying...

Geographical information system (GIS)is gethering computer science,Earth , s science and information science as an organic whole of high-new technology.At present, the GIS technology is widely used in resources management,environmental monitoring, environmental assessement, diaster evaluation, region valley environmental programme and other domoins and has become a support tool of effective policy-making for environmental management both at home and abroad.The article introduces GIS technology applying in making-policy of Jinhua River valley controlling water pollution ,it importantly introduces that under the support of GIS, setting up, program designing and realizing making-policy model(model of water quality) of Jinhua River Velley Control water potlution.

地理信息系统(GIS) 是集计算机科学、地球科学、信息科学为一体的高新技术。目前,GIS技术已广泛用于资源管理、环境监测、环境评价、灾害评估、区域流域环境规划等众多领域,已成为国内外环境管理的有效决策支持工具。本文介绍了GIS技术在金华江流域水污染控制决策方面的应用, 其中重点介绍了在GIS支持下,金华江流域水污染决策模型( 水质模型) 的建立、程序设计和实现

For the city zone and far forth suburb in Beijing, analytical results of sulfur isotopes of the 1994′ surface water have been reported first in this paper, these data,with analytical results of Cl -, SO 2- 4, and NO - 3concentrations, will provide valuable information on source of surface water, effect on surface water from human activity and valley environmental geochemistry in Beijing district. In 1994, all of the samples of surface water were collected monthly in the five locations of...

For the city zone and far forth suburb in Beijing, analytical results of sulfur isotopes of the 1994′ surface water have been reported first in this paper, these data,with analytical results of Cl -, SO 2- 4, and NO - 3concentrations, will provide valuable information on source of surface water, effect on surface water from human activity and valley environmental geochemistry in Beijing district. In 1994, all of the samples of surface water were collected monthly in the five locations of suburb Miyun county and city zone, Shisha Lake, of Beijing district. In Beijing district, the δ 34 S values of annual surface water ranged approximately from 6‰ to 10‰ and varied with season, i.e., maximum in February and minimum in September. All the δ 34 S values of surface water of Miyun and Shisha Lake were higher than 6.1‰, the δ 34 S value of meteoric water in this district. For Shisha Lake in city zone, however, the SO 2- 4 concentrations varied largely with season. Specially, the concentration increased continuously up to near 39mg/L during August and September, but decreased suddenly in October similarly to the variation of Cl - concentration. In Chao River of Xinzhuang, annual concentrations of NO - 3 were higher,10~25mg/L, that will be related to ecological and geographical environment of upriver of Chao River. Excrements, urine and nitrogen fertilizer released or used by human being will cause increase of NO - 3 concentrations in Chao River. For the surface waters of Miyun area and Shisha Lake in 1994, the measured concentrations of Cl -, SO 2- 4, and NO - 3 and δ 34 S values of sulfates indicate that the surface waters derive mainly from the meteoric water in the district. The fact that the δ 34 S values of Bai and Chao Rivers all were higher than the value of meteoric water in the area of Miyun Reservoir reflects a little amount of supply from ground water. For the surface waters in Beijing district, in general, the sulfur compositions possess aseasonal variation of heavier in winter and lighter in summer; annual δ 34 S values varied between 6‰ and 10‰ that is concordant with the regional differentiation observed by the previous, in which the δ 34 S value of meteoric water is negative in the south part of China, but it is positive in the north part. A large amount of biogenic sulfur release should affect on concentration and isotopic composition of sulfur in atmosphere and surface water; biogenic sulfur released from aquatic environment occupying a majority of surface of the Earth is an important source. Thus,biogenic sulfur not only controls seasonal variation of sulfur isotopic compositions in atmosphere and surface water, but also possibly becomes a major reason resulting in the regional differentiation of sulfur isotopic compositions. In the Shisha Lake of city zone, the SO 2- 4 concentrations kept continuously higher, but the δ 34 S values were lower in the surface water since the midsummer. In view of this fact, the biogenic sulfur, which was released by a large amount of cultivated aquatic plants from bloom to decay, may be a major reason resulting in the lower isotopic compositions until winter, but combustion of coals in city zone could not cause so significant variation of sulfur isotopic compositions in the lake in winter.$

对 1 994年密云、什刹海地区地表水中Cl-,SO2 -4 ,NO-3 含量和硫酸盐的δ3 4 S值监测表明 ,北京地区的地表水主要来源于大气降水。上游河水的δ3 4 S值高于本地区的大气降水 ,反映还有少量地下水的加入。潮河上游人类生活和耕作是造成潮河水中NO-3 含量高的主要原因。总体来讲 ,北京地区地表水的硫同位素组成同样具有夏季重、冬季轻的季节变化趋势 ;其全年的δ3 4 S值在 6‰~1 0‰之间 ,与我国南方大气降水为负的δ3 4 S值而北方为正值的区域分异现象吻合。对城区的什刹海与密云水库的硫同位素和SO2 -4 含量变化的分析表明 ,即使是冬季取暖季节 ,控制变化的主要因素是生物成因硫的释放 ,燃煤不可能造成如此明显的硫同位素组成的变化。

Jiulong River is one of the most important rivers in Fujian province.The paper introduces the current situation of the Jiulong River basin environment and analyzes the problem of the water environmental protection in view of the comprehensive improvement of water pollution and ecocide of river basin.And then advances some countermeasures in order to strengthen the valley environmental protection in the tenth five year plan.

九龙江是福建省的重要河流之一。该文介绍了九龙江流域环境现状 ,并针对流域水污染与生态破坏综合整治 ,分析水环境保护面临的问题 ,提出“十五”期间加强流域环境保护的对策建议

 
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