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径流量     
相关语句
  runoff
    The daily runoff in 29 years of Pingle Station in Guangxi province was predicted by ANN after non-linear smoothing transferring. The results showed that days in 10% relatively error averagely increase 47.8%,and days in 20%,relatively error averagely increase 35.6%.
    以广西平乐站29年的日径流量为例,通过适当的非线性平滑预处理后用神经网络进行预测,相对误差<10%的天数平均提高47.8%,相对误差<20%的天数平均提高35.6%。
短句来源
    As a result,the average annual areal precipitation is 80.6×108m3,the average ratio of runoff and areal precipitation(R/P) is 0.38,its maximum and minimum is 0.53 and 0.32 respectively.
    计算结果表明:开都河流域面雨量年平均为80.6×108m3,径流量与面雨量之比(R/P)平均为0.38,最大为0.53,最小为0.32。
短句来源
    The coefficients of variation(Cv) of runoff and areal precipitation are equally 0.17.
    面雨量与径流量的年际相对变化幅度是一样的,变差系数Cv值为0.17。
短句来源
    Using the material of hydrology in the upper Yangtze River and the runoff, the temperature, and the precipitation observed in meteorological stations from1956 to 2004, the intermonthly and interdecadal evolution characteristics of the runoff and the sudden change characteristic in the area are analyzed by the climatic diagnosis method.
    利用1956~2004长江源区水文和气象台站观测的流量、气温、降水资料,用气候诊断方法分析了该地区径流量的月、季和年代际演变特征以及突变特点。
    Change trends slope of calculated areal precipitation and the observed runoff of Aksu river on were 5.79×108m3/10a and 4.29×108m3/10a respectively, and both of them have increased trend. The annual change trend and extent of the areal precipitation are higher then the runoff. Both of their coefficients of variation (Cv) are 0.17 and 0.13, respectively.
    计算出的阿克苏流域面雨量序列与阿克苏河实测径流量序列的趋势变化率分别为5.79×108m3/10a和4.29×108m3/10a,两者均表现出增加趋势,但面雨量的增加速率要比径流量大一些,年际变化幅度也要大,面雨量和径流量的变差系数Cv值分别为0.17和0.13。
更多       
  runoff volume
    Application of the Gray Topological Method in Predicting Runoff Volume at the Debouchure of the Heihe River
    灰色拓扑预测方法在黑河出山径流量预报中的应用
短句来源
    Conversion from forests to cropland, wooded grassland or grassland covers tends to reduce evapotranspiration by 3.1-22.2 % and increase runoff volume by 2.0-15.0 %. This invariably could make flood peaks increase and appear in advance.
    将森林植被转换为耕地、林地草原或草原植被将使年均蒸散发量减少3.1%~22.2%,年均径流量增加2.0%~15.0%,并引起洪峰流量增加、峰现时间提前。
短句来源
    Soil runoff volume and rainfall volume had linear relationship in all communities. Soil runoff volume of four secondary forest communities were 135.58 mm-160.48 mm.
    不同群落的土壤层径流量与降雨量呈线性关系,四种次生群落土壤径流总量为135.58 mm-160.48 mm。
短句来源
    With the support of GIS technology, the SCS (soil conservation service) model was selected to model runoff of the upper watershed of the Luohe River(a tributary of the Yellow River) using a 1 : 250 000 DEM and a 1 : 1 000 000 DEM. By comparison of the simulated annual average runoff yield from 1992 through to 2000, it was found that a higher runoff volume was obtained using the 1 : 250 000 DEM.
    在GIS技术的支持下应用SCS模型,以黄河下游支流洛河卢氏水文站以上流域为研究区,基于1:250 000 DEM和1:1 000 000 DEM对1992-2000年的流域径流量进行了模拟,研究了径流模拟对DEM分辨率的敏感性,结果表明1:250 000 DEM的模拟值比1:1 000 000 DEM为高。
短句来源
    Three meteorological fields of Northern Hemisphere H500, H100 and temperature of West Pacific Ocean (SST) are taken as forecasting elements to do one-year-prediction in Datong station of Yangtse River for monthly runoff and gross runoff volume from July to October.
    介绍了以北半球500hPa高度(H500)、100hPa高度(H100)和西太平洋海温(SST)三个气象场要素作为预报因子,采用逐步回归分析方法,对长江大通站的月径流量、7~10月份的径流总量做预见期为一年的预报。
短句来源
更多       
  runoff amount
    A Study on Characteristics of Runoff Amount and Its Important Significance at the Yangtze
    长江径流量特性及其重要意义的研究
短句来源
    Optimizing Analysis of Calculation Method for Runoff Amount on Loess Slope
    黄土坡面径流量计算方法的优化分析
短句来源
    The paper introduces the method calculating the design peak flow and the design runoff amount in the river without data by utilization of precipitation through an example.
    本文通过实例介绍了利用降水资料推求无资料河流上的设计洪峰流量、设计径流量的方法
短句来源
    The former 35 years's annual runoff amount is simulated and the last 10 years's data is examined,compares it with traditional BP neural network model.
    对太子河流域的5个计算单元前35年年径流量进行了模拟和用后10年资料对模型进行了检验,并与传统的BP神经网络模型进行了比较。
短句来源
    The results showed that on the slope of 5°,there was a power regression between sedimend yield and runoff amount for flow discharge of 15 L/min,20 L/min and 25 L/min,and a linear regression for 10 L/min.
    结果表明:5°条件下在流量为15 L/min2、0 L/min2、5 L/min时产沙量与径流量呈幂函数关系,10 L/min时呈线性关系。
短句来源
更多       
  runoff yield
    With the support of GIS technology, the SCS (soil conservation service) model was selected to model runoff of the upper watershed of the Luohe River(a tributary of the Yellow River) using a 1 : 250 000 DEM and a 1 : 1 000 000 DEM. By comparison of the simulated annual average runoff yield from 1992 through to 2000, it was found that a higher runoff volume was obtained using the 1 : 250 000 DEM.
    在GIS技术的支持下应用SCS模型,以黄河下游支流洛河卢氏水文站以上流域为研究区,基于1:250 000 DEM和1:1 000 000 DEM对1992-2000年的流域径流量进行了模拟,研究了径流模拟对DEM分辨率的敏感性,结果表明1:250 000 DEM的模拟值比1:1 000 000 DEM为高。
短句来源

 

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  runoff
Effect of forest vegetation on runoff and sediment production in sloping lands of Loess area
      
At the same time, better correlative relationship between runoff and sediment production and rainfall and rainfall intensity were testified by multiple regression, but the correlation decreased gradually with the increase of canopy density of forest.
      
Besides, runoff and sediment produced in mixed planting of apple trees and crops were 16.14-fold and 2.96-fold than those of O.
      
Thirdly, based on gray cognate analyses of factors affecting runoff and sediment production in sloping land, the factors of stand canopy density and herb and litter biomass were the most significant ones, whose gray incidence degree exceeded 0.6.
      
When the soil is covered only by litter, both the maximal rainfall amount and intensity in different forest stands are different if there is no water infiltration and runoff from the ground surface.
      
更多          
  runoff volume
The distribution of the total organic substance runoff within a year correlates with the water runoff volume.
      
The quantity of organic substance inflow with each river depends both on the water runoff volume and on the value of mean weighted concentrations of organic substances in water of these rivers.
      
The runoff volume and sediment volume in clearcut are were much bigger than those inR.
      
Based on the water resources of the Shiyang, Heihe and Shule river basins in the Hexi Corridor and their original runoff volume, the actual annual water resources in the oasis of every county and town of the Hexi Corridor are calculated in detail.
      
We found that runoff volume and the NH4+ and NO3- concentration of runoff were greater in inorganic treatments, compared with the organic N sources.
      
更多          
  runoff amount
Besides, with the increase of forest coverage, the runoff amount, runoff depth and runoff coefficient decreased during the rainy seasons.
      
The reduction in runoff amount, both surface and under ground, and the pollution of water body cause a series of environmental problems.
      
A pollutant load is calculated by multiplying the runoff amount by the corresponding EMC value for each land use.
      
For watersheds where saturation excess overland flow dominates, a relationship between runoff amount and moisture content is expected.
      
Figure 8d shows that Case L4 produced the best results with the proper runoff peak timing and the total runoff amount.
      
更多          
  runoff rate
The relationship between the runoff and suspended sediment rates was explained exponentially as S = 1.99 QA1.62 (P >amp;gt; 0.01 and R2 = 0.846) (S is the suspended sediment rate in t d-1, and QA is the average daily runoff rate in m3 s-1).
      
Depending on changes in the lysimeter runoff rate during the infiltration stages, the pore space continua with uniform, stable functioning and those with varying functioning (increasing or decreasing runoff) can be distinguished in a soil body.
      
Results of this analysis demonstrate that the annual stream runoff rate changes from 6.3, towards 3.95, and then to 2.09?l?s-1?km-2 (the difference is significant based on Student's criteria).
      
The distribution of minimal monthly stream runoff rate (February runoff) is controlled by hydrogeological systems in Minnesota.
      
A moving control volume approach was used to model the advance phase of a furrow irrigation system whereas a fixed control volume was used to model the nearly stationary phase and the runoff rate.
      
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