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开孔率
相关语句
  open hole ratio
    Moreover, the influences of open hole ratio and irrigation quotas on relative cumulative evaporation and cumulative evaporation per unit film hole area were analyzed, and the related estimation functions are also provided.
    在此基础上,进一步分析了覆膜开孔率和灌水定额对相对累积蒸发量和单位膜孔面积累积蒸发量的影响,并得出了相对累积蒸发量和单位膜孔面积累积蒸发量与覆膜开孔率和灌水定额之间的定量函数关系。
短句来源
    Then after, through calculation and analysis of the cumulative evaporation, the three-factors empirical function of cumulative evaporation determined by evaporation time, open hole ratio and irrigation quota was developed. The function was based on the theoretical relation of Gardner's equation for bare soil evaporation, it can be considered as an extension of the Gardner's equation.
    通过累积蒸发量的计算分析,基于Gardner关于裸土蒸发的累积蒸发量与时间关系成正比的理论关系,建立了不同覆膜开孔率和灌水定额影响下累积蒸发量随时间变化的三因素模型,从而成为传统Gardner关系的进一步扩展。
短句来源
  “开孔率”译为未确定词的双语例句
    (4) Systematic studies were conducted on infiltration, semi-finite soil redistribution and limited soil redistribution under isothermal condition, emphasized the variation and characteristic of soil water and salt profiles.
    根据以上思路,对不同开孔率条件下有限土柱垂直一维入渗一蒸发的水盐运动也做了同样分析研究,取得了相应成果,从而为该类问题的进一步深入研究与应用提供了重要参考。
短句来源
    On the basis of the development of laboratory equipment from which soil moisture can be measured automatically, the temporal variations of soil water content distribution during evaporation and post evaporation were analyzed, of which, the film hole ratios and irrigation quotas were different.
    在研制了室内蒸发动态观测实验系统的基础上,分析了土表覆膜开孔率和灌水定额不同条件下,蒸发土壤含水率剖面的动态特征。
短句来源
  相似匹配句对
    On the basis of the development of laboratory equipment from which soil moisture can be measured automatically, the temporal variations of soil water content distribution during evaporation and post evaporation were analyzed, of which, the film hole ratios and irrigation quotas were different.
    在研制了室内蒸发动态观测实验系统的基础上,分析了土表覆膜孔率和灌水定额不同条件下,蒸发土壤含水率剖面的动态特征。
短句来源
    Before inflorescence, the day length requirement was not strict.
    花前,对日长要求不严格。
短句来源
    The Current Situation of Grass Resources and Its Utilizing Potentiality in Kai County
    县草资源现状及发利用潜力
短句来源
    (4) Systematic studies were conducted on infiltration, semi-finite soil redistribution and limited soil redistribution under isothermal condition, emphasized the variation and characteristic of soil water and salt profiles.
    根据以上思路,对不同孔率条件下有限土柱垂直一维入渗一蒸发的水盐运动也做了同样分析研究,取得了相应成果,从而为该类问题的进一步深入研究与应用提供了重要参考。
短句来源
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On the basis of the development of laboratory equipment from which soil moisture can be measured automatically, the temporal variations of soil water content distribution during evaporation and post evaporation were analyzed, of which, the film hole ratios and irrigation quotas were different. Then after, through calculation and analysis of the cumulative evaporation, the three-factors empirical function of cumulative evaporation determined by evaporation time, open hole ratio and irrigation quota was developed....

On the basis of the development of laboratory equipment from which soil moisture can be measured automatically, the temporal variations of soil water content distribution during evaporation and post evaporation were analyzed, of which, the film hole ratios and irrigation quotas were different. Then after, through calculation and analysis of the cumulative evaporation, the three-factors empirical function of cumulative evaporation determined by evaporation time, open hole ratio and irrigation quota was developed. The function was based on the theoretical relation of Gardner's equation for bare soil evaporation, it can be considered as an extension of the Gardner's equation. Moreover, the influences of open hole ratio and irrigation quotas on relative cumulative evaporation and cumulative evaporation per unit film hole area were analyzed, and the related estimation functions are also provided.

在研制了室内蒸发动态观测实验系统的基础上,分析了土表覆膜开孔率和灌水定额不同条件下,蒸发土壤含水率剖面的动态特征。通过累积蒸发量的计算分析,基于Gardner关于裸土蒸发的累积蒸发量与时间关系成正比的理论关系,建立了不同覆膜开孔率和灌水定额影响下累积蒸发量随时间变化的三因素模型,从而成为传统Gardner关系的进一步扩展。在此基础上,进一步分析了覆膜开孔率和灌水定额对相对累积蒸发量和单位膜孔面积累积蒸发量的影响,并得出了相对累积蒸发量和单位膜孔面积累积蒸发量与覆膜开孔率和灌水定额之间的定量函数关系。

The soil cannot be totally covered by plastic mulch in the field. And normally in the mulch holes should be preset for plants to emerge after sowing, and irrigation holes added for irrigation. The term of aperture ratio is often used to represent the above issue. So far very few national or international papers about evaporation from soil under perforated plastic mulch have been reported. In order to study characteristics of evaporation from the soil with initial homogeneous soil water content, a laboratory...

The soil cannot be totally covered by plastic mulch in the field. And normally in the mulch holes should be preset for plants to emerge after sowing, and irrigation holes added for irrigation. The term of aperture ratio is often used to represent the above issue. So far very few national or international papers about evaporation from soil under perforated plastic mulch have been reported. In order to study characteristics of evaporation from the soil with initial homogeneous soil water content, a laboratory system of evaporation has been set up. Based on the dynamic observations of soil water and soil temperature, their variation regularities during evaporation and at the end of the evaporation were described, and calculations and analyses of soil temperature variation and soil water content distribution, functions of cumulative evaporation, relatively evaporation and cumulative evaporation per unit area of the film holes to aperture ratios performed. The results showed that under the influence of evaporation, the cumulative evaporation varied linearly with the square of the evaporation time, which corresponded to the bare soil evaporation theory presented by Gardner. These results have extended Gardner equation and expanded its application ranges, thus being very useful for further study on water and heat transport in plastic mulched field.

覆膜灌溉播前铺膜通常无法覆盖全田面 ,而播种后需为作物破土预留出苗孔 ,覆膜灌溉时还需增设灌水孔 ,对上述各类孔的问题 ,可采用覆膜开孔率来统一表征。到目前为止 ,尚未见国内外关于覆膜开孔蒸发的水热耦合迁移方面的报道。在研制了室内蒸发水热动态观测实验系统的基础上 ,本文根据剖面初始含水率均匀的覆膜开孔蒸发土壤水分和温度的动态观测资料 ,分析了土壤温度变化规律及剖面水分的降低趋势 ,并建立了覆膜开孔蒸发的累积蒸发量、相对累积蒸发量及单位膜孔面积累积蒸发量随时间和不同覆膜开孔率变化的函数关系。分析结果表明 ,不同覆膜开孔率控制下的累积蒸发量与时间平方根之间均符合Gardner提出的裸土蒸发理论关系。该结果发展了传统的Gardner方程 ,拓展了该关系的应用途径 ,对今后进一步研究覆膜开孔蒸发的水热运动规律有重要意义。

Based on experiments of evaporation with different open hole ratios after trickle irrigation, the influence of open hole ratio on cumulative evaporation was analyzed. The results showed that there was good linear relation of cumulative evaporation with square root of evaporation time, and the coefficients of them had good relation with the open hole ratio, thus the two-factor function of cumulative evaporation was obtained. The relation of cumulative evaporation with time was corresponding to Gardner's theoretical...

Based on experiments of evaporation with different open hole ratios after trickle irrigation, the influence of open hole ratio on cumulative evaporation was analyzed. The results showed that there was good linear relation of cumulative evaporation with square root of evaporation time, and the coefficients of them had good relation with the open hole ratio, thus the two-factor function of cumulative evaporation was obtained. The relation of cumulative evaporation with time was corresponding to Gardner's theoretical function of bare soil evaporation, and the two-factor function of cumulative evaporation extended Gardner's theory and made it practical in film hole evaporation. Theveafter, the functional characteristics of relatively cumulative evaporation and cumulative evaporation on per film hole area varying with film hole ratios were analyzed, and the distributions of soil water content, soil salt content and soil salt concentration of bare soil evaporation were compared with those of evaporation under entirely plastic mulch. Finally the contour maps were drawn out.

通过滴灌入渗结束的覆膜开孔蒸发实验,分析了土表覆膜开孔率对累积蒸发量随时间变化趋势的影响。累积蒸发量与时间平方根的线性关系符合Gardner的理论关系,而两者关系的系数又与覆膜开孔率之间存在良好的对数关系,从而得出了累积蒸发量的两因素函数关系。这一结果发展了Gardner的理论关系并将其应用于覆膜开孔蒸发的实践上。对相对累积蒸发量和单位膜孔面积的累积蒸发量随开孔率变化的函数特征进行了定量分析,并分析比较了全覆膜和不覆膜蒸发条件下含水率、含盐率和盐分浓度特征,做出了相应水盐特征的等值线图。

 
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