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复氧系数
相关语句
  reaeration coefficient
     Advances and prospects in the research of water reaeration theory and reaeration coefficient
     水体大气复氧理论和复氧系数研究进展与展望
短句来源
     Advances and Prospects in Research of Water Reaeration Theory and Reaeration Coefficient
     水体大气复氧理论和复氧系数研究现状与进展
短句来源
     Basied on conclusion of various research methods of water quality model parameter established by scientists home and abroad,combined with Fenjiang river's actual hydraulic feature and water quality condition,as well as the exsisting experimental condition of this research,the methods for determination of parameter fit to this modal was selected in order to do series research on BOD Depletion Coefficient,stream reaeration coefficient,and sediment oxygen demand of Fenjiang river.
     在总结国内外水质模型参数的各种研究方法的基础上,结合汾江河实际水文、水质条件,以及本研究所具备的实验条件,选择出适合本模型参数的确定方法,从而对汾江河的BOD衰减系数、大气复氧系数、底泥耗氧速率做了一系列研究。
短句来源
     In this model of Tu Men River quality the functional structures of the deoxygenation coefficient k1, reaeration coefficient k2 and BOD sedimentation-resuspension coefficient k3 are established and tbe parameters determined by a regression technique to suit the characteristics of a river in the mountain area of North-Eastern China.
     在所得到的模型中,耗氧系数κ_1,复氧系数κ_2,BOD沉淀-再悬浮系数κ_3被表达为流量与水温的函数。 表达式中的参数通过系统识别与参数估计方法确定,因此能较好地反映河流的地理环境特点。
短句来源
     On the basis of these,the calculating formula of reaeration coefficient considering the coupling of molecular diffusion and turbulent diffusion is brought forward.
     在此基础上提出了水体同时考虑分子扩散和紊动扩散耦合的复氧系数计算公式.
短句来源
  “复氧系数”译为未确定词的双语例句
     Study Progress on Atmospheric Reaeration Coefficients of Turbulent Water Body
     紊动水体大气复氧系数研究进展
短句来源
     Secondly, through field research and experience formula, model parameters, such as BOD decay coefficient (K1), oxygen redissolving coefficient (K2), photosynthesis coefficient (P) and algae respiration coefficient(R), were identified;
     其次,通过实测资料和经验公式对模型中的BOD_5衰减系数K_1、大气复氧系数K_2、光合作刚速度常数P和呼吸作用速度常数R进行参数识别;
短句来源
     Combining the field observation and experimental data analysis, the degradation constant k 1 and reaeration constant k 2 are determined.
     并采用野外观测及实验室分析相结合方法 ,利用汉江已有的环境观测资料和水文资料确定耗氧系数 K1和复氧系数 K2 值。
短句来源
     The maximum and minimum optimal estimation of the parameters are deduced after 30 times repeated estimation calculation. The result shows that the errors of estimated BOD and DO value are in the acceptable range.
     采用30次重复估值试验,并记录所有试验中最优估计值的最大值和最小值,所得到的各河段BOD衰减系数的最优估值与真值的误差和河水复氧系数的最优估值与真值的误差均在允许范围内。
短句来源
     In the case of without similar reservoir data, the predecessor research outcomes are used for reference, then determine oxygen exhaustion coefficient, oxygen recover coefficient and vertical turbulent diffusion coefficient in the paper.
     在没有类比库资料的情况下,文中借鉴前人研究成果确定了降解系数、复氧系数及垂向扩散系数。
短句来源
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  相似匹配句对
     Study Progress on Atmospheric Reaeration Coefficients of Turbulent Water Body
     紊动水体大气复氧系数研究进展
短句来源
     90, and the Cron- bach's coefficient .
     90,! 系数.
短句来源
     economic coefficient;
     经济系数;
短句来源
     Advances and prospects in the research of water reaeration theory and reaeration coefficient
     水体大气复氧理论和复氧系数研究进展与展望
短句来源
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  reaeration coefficient
The reaeration flux at the water-atmosphere interface was deduced from the calculations and a reaeration coefficient was estimated.
      
Gross primary production (GPP) and community respiration (CR) were estimated using the diurnal dissolved oxygen (DO) change technique, with the reaeration coefficient (K2) determined from seven empirical depth-velocity equations.
      
Gross primary production, community respiration and reaeration coefficient were determined during an annual cycle on the Viroin River (South Belgium), based on the daily variations of dissolved oxygen concentration.
      
Several methods for the estimation of the reaeration coefficient were compared by determining the ability of the methods to recover the correct K value from a computer-simulated stream oxygen record affected by a variety of non-ideal conditions.
      
Effects of increased small-scale turbulence on the reaeration coefficient, K2(20), were cancelled by increased stream depth and reduced velocity so that it varied little with flow.
      
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A method for mathematical modeling of the BOD-DO dynamics of a river is described. The method is applied to field data collected on Tu Men River in North-Eastern China. In this model of Tu Men River quality the functional structures of the deoxygenation coefficient k1, reaeration coefficient k2 and BOD sedimentation-resuspension coefficient k3 are established and tbe parameters determined by a regression technique to suit the characteristics of a river in the mountain area of North-Eastern China. In the model...

A method for mathematical modeling of the BOD-DO dynamics of a river is described. The method is applied to field data collected on Tu Men River in North-Eastern China. In this model of Tu Men River quality the functional structures of the deoxygenation coefficient k1, reaeration coefficient k2 and BOD sedimentation-resuspension coefficient k3 are established and tbe parameters determined by a regression technique to suit the characteristics of a river in the mountain area of North-Eastern China. In the model the sedimentation-resuspension coefficient k3 is given in the form of a single analytical function of the flow rate in the river. The model can also be used as basis for a river quality management scheme to be carried through on Tu Men River.

本文讨论了河流中BOD—DO动态的数学模拟方法,并将该方法应用于图们江,利用在图们江上取得的实测数据建立了江中BOD—DO动态的数学模型。在所得到的模型中,耗氧系数κ_1,复氧系数κ_2,BOD沉淀-再悬浮系数κ_3被表达为流量与水温的函数。表达式中的参数通过系统识别与参数估计方法确定,因此能较好地反映河流的地理环境特点。特别是κ_3的表达式,它以流量为自变量,用一个单一的解析函数同时描述了江中的沉淀与再悬浮现象,具有独创性。 本文所提出的BOD—DO动态模型可以做为图们江水质规划与管理的基础。

BOD-DO dynamics for rivers in Northern China during freeze season were investigated. One type of mathematical model which can be used to describe the dynamics was proposed and parameters:deoxygenation rate K1, reaeration rate K2, BOD-DO sedimentation and resuspension rate K3, were determined by a parameter estimation method using the field data based on the Tumen River. Validation of the model shows that the model can describe BOD-DO dynamics better during that season and therefore can be used with the purpose...

BOD-DO dynamics for rivers in Northern China during freeze season were investigated. One type of mathematical model which can be used to describe the dynamics was proposed and parameters:deoxygenation rate K1, reaeration rate K2, BOD-DO sedimentation and resuspension rate K3, were determined by a parameter estimation method using the field data based on the Tumen River. Validation of the model shows that the model can describe BOD-DO dynamics better during that season and therefore can be used with the purpose of prediction and control of the Tumen River quality.

本文定量地研究了北方河流封冻期BOD-DO的动态变化规律。提出了一种描述这一动态变化规律的数学模型形式,并且根据在图们江上收集到的实测数据,利用参数估计方法确定了模型中的耗氧系数K_1、复氧系数K_2和BOD沉淀-再悬浮系数K_3.通过实测数据对该模型进行检验的结果证明,它能较好地反映封冻期河流中的BOD-DO动态,可以做为这一时期水质预测与控制的基础。 用数学模型来描述封冻期河流中BOD-DO的变化规律尚属初次,所提出的模型结构形式仍有待于进一步完善。

Based on the one-dimensional mass-transfer equation of rivers and the characteristics of tidal rivers, a nonsteady state dissolved oxygen(Do) model for the tidal river is developed. The effects of carbonaceous BOD (CBOD) and nitrogenous BOD(NBOD) for organic pollutants on disssolved oxygen level are considerd in the model. The parameters in the equation of reaeration coefficient expressed by tidal velocities and flow depths are determined based on the numerical modeling of DO in the Huangpu River. The comparison...

Based on the one-dimensional mass-transfer equation of rivers and the characteristics of tidal rivers, a nonsteady state dissolved oxygen(Do) model for the tidal river is developed. The effects of carbonaceous BOD (CBOD) and nitrogenous BOD(NBOD) for organic pollutants on disssolved oxygen level are considerd in the model. The parameters in the equation of reaeration coefficient expressed by tidal velocities and flow depths are determined based on the numerical modeling of DO in the Huangpu River. The comparison of measured and calculated data shows that the model predicts satisfactorily DO profiles with time and space in the tidal processes of the Huangpu River.

本文根据河流一维水质对流扩散方程和潮汐河流的特征,建立了潮汐河流潮变溶解氧数学模型.该模型考虑了有机污染物质的碳化和硝化耗氧过程,通过模拟实测的溶解氧,确定了由流速和水深表达的复氧系数公式中的有关参数.计算值与实测值的比较结果表明,本模型能较好地模拟黄浦江潮汐过程中溶解氧的时空变化过程,对进一步探讨潮汐河流的水质变化规律有一定的参考价值.

 
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