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湿地边界
相关语句
  wetland boundary
     Theory, Method and Case of Wetland Boundary Determination
     湿地边界确定的理论、方法与案例
短句来源
     It is suggested that the black box method could be applied to wetland boundary determination under the condition that the mechanisms of wetland formation have not been fully understood based on the analysis on the subjectivity of current criteria for wetland boundary and its causes.
     在分析目前关于湿地边界标准的主观规定性及其原因的基础上,认为:在湿地形成过程中的一些机理问题还没有弄清楚的情况下,可用黑箱方法来确定湿地的边界。
短句来源
     Therefore, the wetland boundary can be redefined, namely, wetland is a transition zone between uplands and deepwater habitats, it is a kind of azonal complex resulted from inundated/saturated by water, its lower boundary lies at the lower limit of rooted plants, and the upper boundary lies at the thinning-out line of upland soil diagnostic horizon.
     基于湿地边界标准的湿地的定义应为:湿地是陆地和水体之间的过渡带,是由于地表淹水/土壤水饱和而形成的一种隐域性自然综合体,其上界位于陆地土壤诊断层的尖灭点处,其下界是有根植物下界。
短句来源
  “湿地边界”译为未确定词的双语例句
     Study on the Theory and Methods of the Identification of Wetlands Boundary
     湿地边界确定研究进展
短句来源
     NUMERICAL STUDY ON IMPACTS OF BOUNDARY LAYER FLUXES OVER WETLAND ON SUSTENTION AND RAINFALL OF LANDFALLING TROPICAL CYCLONE
     湿地边界层通量影响热带气旋登陆维持和降水的数值试验
短句来源
     Sixth, using the 3S technology also can estimate the biology resources of wetlands and carry on the biodiversity analysis and evaluation. 3S technology can investigate and study the wild animal habitat of wetlands. Using the vegetation spectrum model can do the inversion of wetland vegetation biophysics parameter and so on.
     提出应加大3S技术集成的深度,加强3S技术在湿地生物多样性、湿地环境效益、湿地边界确定及湿地资源管理等研究中的应用,把对湿地资源信息的分析和处理提高到研究湿地空间的规划和决策层面上,为管理和合理利用湿地资源指引方向。
短句来源
     The scientific significance to use the thinning-out point of soil diagnostic horizon as the wetland upper boundary was discussed in theory according to the fact that soil diagnostic horizon results from long-term integrated interaction of all environmental elements.
     基于土壤诊断层是各种自然地理要素长期综合作用结果这一地理学论断,将土壤诊断层在湿地边界处的尖灭现象与系统论的“黑箱”方法相结合,论述了利用土壤诊断层尖灭点作为湿地上界在理论上的科学性。
短句来源
  相似匹配句对
     Study on the Theory and Methods of the Identification of Wetlands Boundary
     湿地边界确定研究进展
短句来源
     Theory, Method and Case of Wetland Boundary Determination
     湿地边界确定的理论、方法与案例
短句来源
     Boundary thinking
     边界沉思
短句来源
     BORDER DISEASE: A REVIEW
     边界
短句来源
     The "Ark" on Wetland
     湿地方舟
短句来源
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  wetland boundary
Theory and method for wetland boundary delineation
      
Roan (Hippotragus equinus) population decline in Kruger National Park, South Africa: influence of a wetland boundary
      
Wetland boundary and land-use planning in southern Ontario, Canada
      
There is a general lack of understanding of wetland processes and a general paucity of scientific research to predict the effects of development on wetland boundary.
      
All buffers shall be measured on a horizontal plane from the wetland boundary as surveyed in the field.
      
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How to get high accuracy of classification by remote sensing image processing technology is one of the difficulties in applications of wetland data. The paper discusses the methods to enhance the accuracy of classification for the wetland of Zhalong. First we can noise reductions enhance and tasseled cap enhance to improve its accuracy. Then compare the classification results of original image with those of the other two enhance methods. The results are very similar, i.e., 83.91% of original image, 78.88% of...

How to get high accuracy of classification by remote sensing image processing technology is one of the difficulties in applications of wetland data. The paper discusses the methods to enhance the accuracy of classification for the wetland of Zhalong. First we can noise reductions enhance and tasseled cap enhance to improve its accuracy. Then compare the classification results of original image with those of the other two enhance methods. The results are very similar, i.e., 83.91% of original image, 78.88% of noise reduction and 90.13% of tasseled cap respectively, checked by GPS sample points gained from fields, land cover data of 2000 and Kappa accuracy assessment. Each method has its own advantage in differentiating the classes, especially the accuracy in the wetland boundary after noise reduction enhance and the accuracy in the sub classes of wetland after tasseled cap enhance. But none of them is very satisfied. So based on knowledge and the technique of GIS, we can put the advantages of each methods together to gain an excellent result. The new method is the kernel of this paper, using spatial algebra, which combines the technique of RS and GIS together, and it can greatly improve the accuracy and reflect the actual land types better in classification of wetland. Its accuracy can get to 96% after checked by GPS sample points,land cover data of 2000 and visual interpretation. Then we can draw a conclusion that as far as wetland classification is concerted, the image enhance before classification can improve its accuracy in some parts, but using spatial algebra based on GIS technology can put the advantage together and get the best result.

遥感影像高精度自动分类方法的实现是制约遥感数据应用的瓶颈之一。以知识和地理信息系统为支撑,进行湿地遥感影像的分类,并对各项分类方法的精度进行比较评价,从而为湿地遥感的分类方法提供依据。实验结果表明经辐射增强降噪处理后湿地边界更加明晰;而对于处于生长期的湿地影像,经过光谱增强缨帽处理后,明显提高了区分湿地亚类的精度。结合以上两种分类方法的优势,利用GIS技术对二者进行空间处理,取长补短,生成了湿地遥感影像分类图。实验证明基于3S技术的分类方法精度更高,是一种较好的湿地影像自动分类方法。

Typhoon Nina(1975) moved into inland and then stagnated and sustained for 4-5 days after it made landfall in Fujian province of China on Aug.4,1975.Nina re-strengthened over inland resulting in severe flooding with the extreme rainfall of 1062 mm in 24 hours.Previous analysis indicated that the landfalling TC could sustain a longer time if it stagnated over a huge surface of a lake,reservoir or saturated wet land.Severe rainfall disaster may be arised from a certain TC remnant sunstained over land.The impacts...

Typhoon Nina(1975) moved into inland and then stagnated and sustained for 4-5 days after it made landfall in Fujian province of China on Aug.4,1975.Nina re-strengthened over inland resulting in severe flooding with the extreme rainfall of 1062 mm in 24 hours.Previous analysis indicated that the landfalling TC could sustain a longer time if it stagnated over a huge surface of a lake,reservoir or saturated wet land.Severe rainfall disaster may be arised from a certain TC remnant sunstained over land.The impacts of land-air fluxes in saturated wet land boundary layer on TC sustention have been discussed.The PSU/NCAR non-hydrostatic mesoscale model MM5v3 and its TC Bogus scheme were employed to perform several sets of numerical simulation.Bi-directional feed-back double nested grid mesh was used and Grell and Kain-Fritsch convective parameterization schemes were adopted for coarse and fine mesh respectively.Reiser's scheme and the Blackadar PBL parameterization were employed in those experiments.The results have shown that the vertical transfer of the physical quantities of the boundary layer over saturated wet land would affect the structure,intensity and rainfall of a landfalling typhoon to a great degree.Fluxes of latent and sensible heatings are favorable to tropical cyclone sustention and intensification,but the latent heat flux would play a major role in tropical cyclone intensification and sustention of spiral rain-band.They also affect the rainfall distribution.On the other hand,momentum flux would weaken TC circulation obviously and consume TC energy remarkably,but it somewhat increases the TC rainfall in local area.

用MM5v3模式及其TC Bogus方案对台风Nina(7503)在中国大陆上的维持加强过程进行模拟,并通过各种敏感性试验,研究了饱和湿地对热带气旋在大陆上维持和降水的影响。结果表明:湿地边界层内各通量对登陆热带气旋的强度、结构及其降水具有明显影响。潜热通量和感热通量均有利于热带气旋的维持和加强,其中潜热输送的作用显著,感热输送的作用较小。潜热和感热通量有利于热带气旋雨带螺旋结构的维持,对台风降水分布有明显影响,动量通量对热带气旋风场有显著的削弱作用,是其能量耗散、低压填塞的主要原因,但对台风降水具有局地增幅作用。

Wetland is a special ecosystem between land and water. It can provide massive foods, raw material, water resources and habitat for human being, animals and plants. Wetlands are so important that wetlands' development, management and protection have become the focus of public attention. The technology of Remote Sensing (RS), Navigation Satellite Timing And Ranging Global Position System (GPS) and Geographic Information System(GIS) can support to carry out wetlands' studies and to establish platform of wetland...

Wetland is a special ecosystem between land and water. It can provide massive foods, raw material, water resources and habitat for human being, animals and plants. Wetlands are so important that wetlands' development, management and protection have become the focus of public attention. The technology of Remote Sensing (RS), Navigation Satellite Timing And Ranging Global Position System (GPS) and Geographic Information System(GIS) can support to carry out wetlands' studies and to establish platform of wetland management. So 3S(RS, GPS and GIS) technology has been applied widely to many aspects of wetland researches, such as investigation of wetland resources, dynamic monitoring of change of wetland landscape pattern and resources and so on. Here we mainly give the summary of application of 3S technology to wetland researches on six aspects. First, during the process of survey of wetland resources, the data of various kinds of wetland resources can be obtained from RS images. By the image data, the around environment and interior structure of wetlands could be understanding. The high accuracy localization ability of GPS may provide RS and GIS accurate wetland localization data. GIS technology with its formidable spatial analysis and data management functions carries on the spatial analysis and attribute data management for RS and the GPS data. Second, 3S technology is used to monitor dynamic changes of wetlands, including images processing, field validation and amendment of wetland thematic map. Third, 3S technology has rapidly become important technology for analysis of landscape change of wetland since 1980s, which enormously promoted the development of landscape quantitative investigation provide data base for each kind of landscape pattern. The steps of analysis of wetland landscape are to choose the RS images as the basic data; then, to use RS soft wares to do classification and gain each kind of landscape thematic map; next, to calculate each landscapes' parameter, area, perimeter and all landscapes amounts with GIS; finally, according to the landscape ecology principle, to calculate each kind of landscape index based on these foundations. Fourth, remote sensing image has reality, dynamic and accurate characteristics, which can provide the huge information for wetland mapping. At the same time, GPS can provide the accurate localization of wetlands and has formidable mapping function of GIS can do wetland map. 3S technology can meet all kind of thematic mapping requirements. Fifth, 3S technology can support management of wetland resources. Sixth, using the 3S technology also can estimate the biology resources of wetlands and carry on the biodiversity analysis and evaluation. 3S technology can investigate and study the wild animal habitat of wetlands. Using the vegetation spectrum model can do the inversion of wetland vegetation biophysics parameter and so on.

湿地具有多种生态功能和经济与社会价值,是人类赖以生存和发展的自然资源宝库与生存环境。湿地研究已受到国际社会的高度重视,成为国际生态学与环境科学研究的热点问题之一。3S技术的发展为湿地研究提供了新的方法和强有力的技术支持。主要论述了3S技术在湿地资源调查、湿地动态变化监测、湿地景观变化分析、湿地制图、湿地资源管理等方面的应用概况;在此基础上概要论述了3S技术在湿地研究应用中存在的主要问题和解决方案;最后论述了3S技术在湿地研究应用中的发展前景。提出应加大3S技术集成的深度,加强3S技术在湿地生物多样性、湿地环境效益、湿地边界确定及湿地资源管理等研究中的应用,把对湿地资源信息的分析和处理提高到研究湿地空间的规划和决策层面上,为管理和合理利用湿地资源指引方向。

 
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