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曼宁公式
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  manning formula
     An Application of Manning Formula in Shallow and Wide River
     曼宁公式在宽浅型河流中的应用
短句来源
     ON APPLICATION OF MANNING FORMULA FOR TORRENTIAL CURRENT
     曼宁公式应用在急变流的探讨
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     The surface roughness coefficients of 11 typical stands were quantified by using the Manning Formula for field experiments during the year 2002 and 2003 in Xiangshuixi watershed, Three Gorges Region,at Jiangjin City of Chongqing Municipality.
     2 0 0 2— 2 0 0 3年期间 ,作者选择三峡库区响水溪流域 1 1块具有典型代表性的林地 ,在野外小区径流实验基础上 ,通过曼宁公式 ,对地表糙率系数进行了定量研究 .
短句来源
     Manning formula has been widely accepted for hydraulic calculation of open channel conduits in hydraulic engineering and water and wastewater works as well.
     曼宁公式在给水排水工程和水利工程中进行明渠水力计算时是普遍采用的计算公式.
短句来源
     Based on the field surface shallow flow experiments,the roughness coefficient value (n)on different land have been quantitatively demonstrated by changed Manning Formula in this pa-per.
     在野外小区径流实验基础上,通过经转换的曼宁公式,对不同坡地地表的糙率系数n值进行了定量研究。
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  manning ' s formula
     The one-dimensional flood routing method is extened to two-dimensional, and the introduction of Manning's formula allows evaluation of stage as well as discharge.
     防洪工程需要行洪淹没计算. 本文把一维的洪水演算方法扩展成为二维,并直接应用曼宁公式,计算出水位与流量,效果与水力学方法相同.
短句来源
     To establish relationship between water level and water flow is a difficult problem,and to solve by using Manning's formula will engender fairly great error.
     水位流量关系的确立是一个难题,利用曼宁公式求解会产生较大误差.
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     The Relation between Manning's Formula and the Formula of Logarithmic Velocity
     曼宁公式与对数流速公式的转换关系
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     In this paper,the authors discussed the definition and classification of debris flows, and studied the characteristics of different equation forms of debris flow motion. The authors considered that the average velocity formulas of debris flows accord with the Manning's formula.
     本文讨论了泥石流的定义和分类 ,分析了不同形式泥石流运动方程的结构特点 ,认为泥石流平均流速公式与曼宁公式结构相似。
短句来源
     The study for relationship between roughness coefficient and turbulent characteristics indicates that roughness coefficient does not have evident physical senses, it only is an adjustable coefficient in Manning's formula.
     糙率系数和水力特性的相关研究表明,糙率系数不具有明确的物理意义,它是曼宁公式中的一个调节系数。
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  “曼宁公式”译为未确定词的双语例句
     Because the situation of an actual river is so complex (not as artificially channels) that using Manning's equation will lead to error inevitably.
     因为天然河道形状复杂,故而在近似化为宽浅人工渠道并用曼宁公式处理时不可避免地会带来模型误差。
短句来源
     Besides, as it is very difficult in using Manning's equation to compute directly, traditional method made some approximation in application.
     此外,由于直接采用曼宁公式计算比较困难,因此传统算法在实际计算时采取了一些近似方法。
短句来源
     4. According to the flood wave movement principle in hydrology, it was analyzed that how the dams effort the time of flood movement, and use hydraulics Manning equation to get the coarse rate in every reach according to the surveyed water table line and the plane, vertical, horizontal sections' data.
     4.运用水文学关于洪水波远动的原理分析防洪堤对洪水传播时间的影响; 根据调查的天然水面线及河段内各处平面、纵横断面资料,应用水力学曼宁公式反推河道各河段平均糙率。
短句来源
     Based upon potential flow,the approximate calculation of flow over a spillway dam is conducted by the use of the Manning equation to de- termin energy head losses along the spillway face and the method of in- creasing surface roughness in the buckets.
     本文在势流计算基础上,沿溢流面用曼宁公式确定水头损失,在反弧段采用加大糙度方法进行过坝水流的近似计算,给出沿程自由水面位置、压力、流速及能量损失等水力参数。
短句来源
     On the basis of theoretical analysis and experimental statement the author affirmed that beside for steady flow and the transition zone to unsteady flow in open channel, this formula is suitable for the hydraulic calculation of torrential current too if the resistant of the wall is taken into account.
     作者通过理论分析与实验证明,曼宁公式不仅适用于明渠均匀流和非均匀流的渐变流,而且在考虑壁面阻力后也适用于急变流的水力计算中.
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  manning formula
The procedure is based on the Manning formula and the n-vR relationships, vegetation density and different types of distribution of submerged weeds along the canal cross-section.
      
In this paperthe flow resistance required in the Manning formula wascalculated from laboratory experiments and field data.
      
The mean flow velocity u can be obtained from the well-known Manning formula.
      
  manning ' s formula
One of the main factors is stream velocity, which is described by Manning's formula.
      
For the stage recorders uniform flow was assumed in the outlet pipe and Manning's formula was used to estimate a stage-discharge rating curve.
      
The time of concentration for a subbasin is found using Manning's Formula that takes into consideration overland flow and channel flow.
      
Water hammer, uniform and non-uniform flow, discharge through channels using Chezy's formula and Manning's formula.
      


Based upon potential flow,the approximate calculation of flow over a spillway dam is conducted by the use of the Manning equation to de- termin energy head losses along the spillway face and the method of in- creasing surface roughness in the buckets.The free surface locations and pressures and velocities and energy losses along the dam surface are obtained by the use of the method,As shown by the verification examples,the computed results are satisfied and applicable to the hy- draulic calculation of spillway...

Based upon potential flow,the approximate calculation of flow over a spillway dam is conducted by the use of the Manning equation to de- termin energy head losses along the spillway face and the method of in- creasing surface roughness in the buckets.The free surface locations and pressures and velocities and energy losses along the dam surface are obtained by the use of the method,As shown by the verification examples,the computed results are satisfied and applicable to the hy- draulic calculation of spillway dams.

本文在势流计算基础上,沿溢流面用曼宁公式确定水头损失,在反弧段采用加大糙度方法进行过坝水流的近似计算,给出沿程自由水面位置、压力、流速及能量损失等水力参数。验证计算表明,该近似计算具有一定精度,供溢流坝水力计算参考。

In result of overall examination of the hydraulic resistance characteristics of the hyper-concentration flow in laboratory as well as in field, in process of which is considered the errow in flow measurement in field condition and the influnce of the ununiform distribution of water depth along a cross section on the resistance parameter, it is crear that the relationship between depth and velocity of the hyper-concentration flow is to be the same as of lowsediment laden flow under the same condition. So, if...

In result of overall examination of the hydraulic resistance characteristics of the hyper-concentration flow in laboratory as well as in field, in process of which is considered the errow in flow measurement in field condition and the influnce of the ununiform distribution of water depth along a cross section on the resistance parameter, it is crear that the relationship between depth and velocity of the hyper-concentration flow is to be the same as of lowsediment laden flow under the same condition. So, if Manning formula is used in hydraulic calculation for the hypersediment laden flow, the value of n can be chosen likely as for nosediment laden flow. In this paper is also given a calculation method, in which a prevention from entering the limilar flow is provided, as well as an example.

通过对室内外高含沙水流阻力特性的综合分析,考虑到野外实测高含沙水流的流速偏小、水深在断面上分布不均匀对综合阻力值的影响,在同样的条件下,高含沙水流与低含沙水流的水深与流速间的关系相同,因此,可用曼宁公式进行高含沙水流水力计算,其n值的选取主要取决于河床条件,可与清水相同。文中还给出了控制不进入层流区的计算方法及计算实例。

The one-dimensional flood routing method is extened to two-dimensional, and the introduction of Manning's formula allows evaluation of stage as well as discharge. The method can also be applied to lakes, reservoirs, tributaries and water networks.

防洪工程需要行洪淹没计算.本文把一维的洪水演算方法扩展成为二维,并直接应用曼宁公式,计算出水位与流量,效果与水力学方法相同.此法有简明易用,尺度大,机时省等优点,还可推广应用于湖泊水库水流,分流河段.水网汇流等问题.

 
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