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exploitation     
相关语句
  开发
    Study on Digitalization and Exploitation of Eco-Tourism Resources in the South Dongting Lake Wetland
    南洞庭湖湿地生态旅游资源的数字化和开发研究
短句来源
    Tourism Resource Exploitation and Sichuan Economic Development
    论旅游资源开发与四川经济发展
短句来源
    SOME PROBLEMS OF THE PLANNING,EXPLOITATION AND UTILIZATION OF COASTAL ZONES
    海岸带规划与开发利用若干问题讨论
短句来源
    THE RESOURCES EXPLOITATION OF THE SHANXI-CENTERED ENERGY BASE
    以山西为中心的能源基地的资源开发
短句来源
    DISCUSSION ON THE EXPLOITATION AND UTILIXATION OF WATER RESOURCES IN QINGDAO
    青岛水资源的开发利用探讨
短句来源
更多       
  开发利用
    SOME PROBLEMS OF THE PLANNING,EXPLOITATION AND UTILIZATION OF COASTAL ZONES
    海岸带规划与开发利用若干问题讨论
短句来源
    DISCUSSION ON THE EXPLOITATION AND UTILIXATION OF WATER RESOURCES IN QINGDAO
    青岛水资源的开发利用探讨
短句来源
    Discussion on Rational Exploitation of the Resources of Low Hills and Gentle Slopes in Jinhua
    金华市低丘缓坡地资源合理开发利用的探讨
短句来源
    ENVIRONMENT EFFECT ANALYSIS OF WATER RESOURCE EXPLOITATION IN TUOKEXUN OASIS
    托克逊绿洲开发利用水资源的环境效应分析
短句来源
    Brief Discussion of the Impact of Water Resources Exploitation on Environment and Its Preventing Measures in Shandong Province
    山东省水资源开发利用对环境的影响及防治措施浅议
短句来源
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  开采
    Rational exploitation and utilization of chromite resources in Tibet
    西藏铬铁矿资源的合理开采和利用刍议
短句来源
    This paper used the recent ground water information(from 1980 to 2000),has calculated the yearly average exploitation of shallow groundwater which mineralization degrees M was below 2 g/L by the way of exploiting coefficient for each second water resources region and the plain of every province respectively.
    利用近期(1980~2000年)地下水资料,采用可开采系数法,分别计算了西北诸河区各水资源二级区和各省(区)平原区M≤2 g/L矿化度分区的浅层地下水多年平均可开采量。
短句来源
    GIS and groundwater exploitation and surface subsidence modeling system integrated analysis of Suzhou Wuxi Changzhou Area
    苏锡常地区GIS与地下水开采及地面沉降模型系统集成分析
短句来源
    Evaluation on Influences of Coal Exploitation for Underground Water Resources in Shanxi Province
    山西煤矿开采对地下水资源影响评价
短句来源
    A Study of Comprehensive Factors Effective on Evaluting Exploitation Potentialities of Groundwater Resources
    地下水资源开采潜力评价的综合因素浅析
短句来源
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  利用
    SOME PROBLEMS OF THE PLANNING,EXPLOITATION AND UTILIZATION OF COASTAL ZONES
    海岸带规划与开发利用若干问题讨论
短句来源
    DISCUSSION ON THE EXPLOITATION AND UTILIXATION OF WATER RESOURCES IN QINGDAO
    青岛水资源的开发利用探讨
短句来源
    Discussion on Rational Exploitation of the Resources of Low Hills and Gentle Slopes in Jinhua
    金华市低丘缓坡地资源合理开发利用的探讨
短句来源
    ENVIRONMENT EFFECT ANALYSIS OF WATER RESOURCE EXPLOITATION IN TUOKEXUN OASIS
    托克逊绿洲开发利用水资源的环境效应分析
短句来源
    Brief Discussion of the Impact of Water Resources Exploitation on Environment and Its Preventing Measures in Shandong Province
    山东省水资源开发利用对环境的影响及防治措施浅议
短句来源
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  exploitation
Spontaneous potential well-logging is one of the important techniques in petroleum exploitation.
      
Exploitation of rare earth catalysts in polymer syntheses
      
Some plants of Hebei Province in China are under threat from human activities, such as over-herding and over-exploitation of wild medicinal plants and industrial plants, etc.
      
Biocides should be introduced into systems susceptible to biocorrosion at the start of their exploitation, otherwise higher concentrations or synergistic compositions have to be used.
      
Results of industrial exploitation of a biofiltration plant tailored for purifying gaseous discharges of hazardous organic components such as toluene, cyclohexane, and xylene, are examined.
      
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The exploitation and utilization of water resources affects environmental development and quality. In the early 1970's water resource in Hai He and Luan He drainage basins was exploited and utilized very greatly, once the natural environment was changed enormously. In the past 35 years, the total storage of new reservoirs was 25.9 billion cubic meters, and areas of new agricultural irrigation was 100 million mu, at the same time questions of flood control and water supply in cities, industrial and mining...

The exploitation and utilization of water resources affects environmental development and quality. In the early 1970's water resource in Hai He and Luan He drainage basins was exploited and utilized very greatly, once the natural environment was changed enormously. In the past 35 years, the total storage of new reservoirs was 25.9 billion cubic meters, and areas of new agricultural irrigation was 100 million mu, at the same time questions of flood control and water supply in cities, industrial and mining areas were partly solved, About 10.17 million mu of saline-alkali soil were improved and 23 million mu of low-lying and frequently flooded land were treated in a comprehensive way The drainage conditions in the plain of China were improved and soil has been changed into drab soil. The distribution of water resources in time and space varied greatly. The average annual discharge to the sea has been decreased half as much as the amount of 21 billion cubic meters in 1965 Utilizing ratio of water resources increased from 23% in the 1950' s to 59% in the 1970's. Annual extraction of groundwater amounted to 17.8 billion cubic meters, Groundwater levels went down and infiltration of precipitation increased. The utilizable and effective water resources that changed from evaporation of groundwater by some rational ways amounted annually to about 2 bilion cubic meters per year. The changes in the elements of water balance gave rise to harmful changes in environment, the main aspects being as follows.( 1 ) Natural water area of river and lakes greatly decreased, and aquatic products and their quality were also decreased due to water pollution and construction of sluice gates.2 ) As drainge of waste water increased, the quality of surface water and ground water deteriorated. The most serious conditions were in the Long Yang He. Generally, the water quality of the first flood each year is very poor.( 3 ) The variation of runoff of rivers often gave rise to siltation of resar-voirs, river courses and estuaries.( 4 ) Exploitation of groundwater in depth made groundwater levels decrease greatly over large area and cause surface subsidence. For instance, the area of land subsidence in Tianjing was 2,308 square km and the highest subsidence was 2.04m. In some areas, deep groundwater contains heavy fluoride and alkali materals, having effects on human health, on soil and plant.( 5 ) Due to decrease of discharge in some rivers, shipping was reduced, indirectly affecting environmental quality.The main reason for harmful impacts on environment is the shortage of water resources. The water transfer from south to north is a strategic measure to solve questions of environmental water conservancy When we consider water supply to cities, industry and agriculture, we must simultaneously consider water supply for fishery, shipping, treatment of siltaion, protection of water quality and tourism We must prevent water pollution and do well for management of environmental water conservancy and assessment of environmental impacts.

水利工程设施对防治旱涝及人民生活起了重要作用,但也出现了对环境不良影响的环境水利问题并指出了解决这些问题的措施和意见。

This paper gives an example of eva-luating underground water resourcesthat solves the mathematics model ofporous unconfined aquifer and confinedfissured-karstic aquifer of couplingstructure double layer permeability flowsystem using finite difference method.The main characteristics of this paperare:1. Correction of parameters isorganically combined together with thedemonstraction of the balance of waterguantity,which can ensure the reliabili-ty of calculated results.2. It uses new method correctingparameters...

This paper gives an example of eva-luating underground water resourcesthat solves the mathematics model ofporous unconfined aquifer and confinedfissured-karstic aquifer of couplingstructure double layer permeability flowsystem using finite difference method.The main characteristics of this paperare:1. Correction of parameters isorganically combined together with thedemonstraction of the balance of waterguantity,which can ensure the reliabili-ty of calculated results.2. It uses new method correctingparameters in variant stages,that hasrisen the accuracy and made a good useof observation data of water level.3. Fitting primary water level,The fitting speed of water is risen.4. Three exploitation sechemeshas been designed,and groundwater levelof ten years has been predicted.

本文提供了一个用有限差分法求解孔隙潜水一裂隙岩溶承压水双层渗流系统耦合结构的数学模型进行地下水资源评价的实例。其特点是:1.将参数调整和水量均衡论证有机地结合在一起,保证了计算结果的可靠性;2. 采用了分段调参的新方法,提高了精度,充分利用了水位实测资料;3. 进行了初始水位拟合,提高了水位拟合速度;4. 设计了三种开采方案,进行了十年水位预测。

The northern part waters of Zhejiang Province is not only the main spawning and feeding ground for important valued fishe,also an ideal habitat for small fishing fishes.The decrease of main valued fish resource in recent years has resulted in the opportunity for full growth and reproduction of small fishes.So the relative and absolute amount of the latter has obviously increased.This paper,based on the investigation data,submits an analysis of the distributive delimitation,their charact- eristics and regular...

The northern part waters of Zhejiang Province is not only the main spawning and feeding ground for important valued fishe,also an ideal habitat for small fishing fishes.The decrease of main valued fish resource in recent years has resulted in the opportunity for full growth and reproduction of small fishes.So the relative and absolute amount of the latter has obviously increased.This paper,based on the investigation data,submits an analysis of the distributive delimitation,their charact- eristics and regular fluctuation of the small valued fishes such as Harpodon nehereus, Myctophum pterotum,Collichthys lucidus etc.Finally an evaluation of present resource amount and a suggestion for their exploitation are put forward.

浙江北部沿岸海域不仅是主要经济鱼类的产卵场及其幼鱼的索饵、育肥场,而且是众多的小型经济鱼类的栖息、生长、聚集的优越场所。近年来,随着传统的主要经济鱼类资源的衰减,导致小型经济鱼类获得充分繁殖与生长的机会,其相对与绝对数量明显增加。本文根据调查所得资料,对可供利用的小型经济鱼类,如龙头鱼,风鲚、棘头梅童鱼、鳀鱼、黄鲫等的分布范围、特点及变动等情况进行分析,该项鱼类的资源现存量进行了估算。最后提出一些开发利用的意见。

 
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