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irrigation
相关语句
  灌溉
    Study on Crop-Water Relationship and Availability of Field Irrigation Water Based on SWAP Model Simulation in Arid Area
    干旱区作物—水分关系与田间灌溉水有效性的SWAP模型模拟研究
短句来源
    Evaluation of Comprehensive Effects of Water-Saving Irrigation on a Regional Scale: Methods and Applications
    区域节水灌溉综合效应评价方法与应用研究
短句来源
    Analysis on Water Use Demand for Irrigation and the Development of Water-Saving Irrigation
    灌溉用水需求分析与节水灌溉发展研究
短句来源
    Study on Strategy for Grain Security and Irrigation Development in China
    中国粮食安全及灌溉发展对策研究
短句来源
    Economic Analysis of Irrigation Projects
    灌溉项目的经济分析方法
短句来源
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  灌水
    A Study on Technique of Improving Surface Irrigation
    改进地面灌水技术设施的研究
短句来源
    Grey Correlation Analysis of Food Yield and Irrigation
    粮食产量与灌水程度的灰色关联分析
短句来源
    Causes and Benefits Analysis of Water Saving and Yields Increasing by the on-Film Irrigation Technology
    膜上灌水技术节水、增产的原因和效益分析
短句来源
    Experiment and Study of the Surge Flow Border Irrigation Technology
    涌流畦灌灌水技术试验研究
短句来源
    Water Balance and Benefit Analysis of Pure Well Irrigation in the Yellow River Irrigation District
    引黄灌区纯井灌水均衡及效益分析
短句来源
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    The Theory and Method of Designing Screen Filtere for Micro irrigation
    微用滤网过滤器设计原理与方法
短句来源
    A Preliminary Study of the Effect of Micro-Spray Irrigation on Field Climate
    关于微喷对田间小气候影响的初步研究
短句来源
    A Study on the Mechanism of Water Conservation and Yield Increase Under Intermittent Fow Irrigation
    间歇节水高产机理研究
短句来源
    A Study on Technical Parameters for Furrow and Border Irrigation by Fuzzy Optimization
    沟(畦)技术要素模糊优化研究
短句来源
    Theory of Film Hole Irrigation and Practical Technology Research
    膜孔理论及实用技术初步研究
短句来源
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  “irrigation”译为未确定词的双语例句
    Study on Water-saving Mechanism and Calculating Methods of Crop Water Requirement in Controlled Alternative Furrow Irrigation
    控制性交替隔沟灌溉的节水机理与作物需水量估算方法研究
短句来源
    Prediction and Research of Water-Soil Environment Effect under Light-Saline Water Irrigation Based on Visual MODFLOW and SWAP Coupling Model in Arid Area
    基于Visual-MODFLOW和SWAP耦合模型干旱区微咸水灌溉的水—土环境效应预测研究
短句来源
    Study on Comprehensive Evaluation of Performance in Large-sized Irrigation Scheme
    大型灌区运行状况综合评价研究
短句来源
    Development of GIS-based Irrigation Management Information System in Liaoning
    基于GIS辽宁省灌区管理信息系统的研究
短句来源
    Theory and System Research of Micro-pressure Drip Irrigation Technology
    微压滴灌技术理论与系统研究
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  irrigation
Characteristics of root growth in a fast-growing and high-yield poplar plantation under subsurface drip-irrigation
      
'I-214') were studied under two contrasting conditions, subsurface drip-irrigation (SDI) and normal irrigation (CK), on the sandy soil of Chaobai River, Beijing.
      
The Dabieshan District is a main ecological area with a function of soil and water conservation where seven large reservoirs and irrigation systems of the Pishihang are distributed.
      
Spraying wheat seedlings with these extracts, in contrast to the irrigation of soil, markedly diminished infection in plants with powdery mildew.
      
Since infiltration arises as a result of irrigation or input from atmospheric water, it actually acts in certain seasons of the year and not all year long.
      
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Some useful methods provailed in our country are presented here for calculating the economical head in pumping irrigation. Combining with the practical data from Jing Tai-Chuan Electrical Power Irrigation Project iii Gansu province, the author makes an analysis and a detailed comment on them. on the cases of the above discussion, a more effec- tive method is proposed, which involves many factors related to this subject.

本文介绍了国内关于经济扬程现有的几种计算方法,并分别进行了分析评价。在此基础上,以甘肃省景泰川电灌一期工程实际资料为例证,提出了一种考虑多方面因素的计算方法,并探讨了提高经济扬程的途径和方法。

A method called “Comprehensive evaluation with several indexes” which based on the principle of the time value of money has been worked out in this paper for economic analysis of irrigation projects. A numerical solution can be given to evaluate the economic results obtained from the project by the state, production teams and peasants. It also can be used to analyse the cost recovery of the government and the incremental net benefits of the peasants from irrigation development, and these are the...

A method called “Comprehensive evaluation with several indexes” which based on the principle of the time value of money has been worked out in this paper for economic analysis of irrigation projects. A numerical solution can be given to evaluate the economic results obtained from the project by the state, production teams and peasants. It also can be used to analyse the cost recovery of the government and the incremental net benefits of the peasants from irrigation development, and these are the basic data to determine the water charges on the main objects of economic growth and peasant's burden. Identifying and pricing costs and benefits as well as the criteria of justification for assessing the irrigation project in China have been proposed. The paper contributed an example for guiding to the use of the method. Special thanks have finally to be expressed to Dr. Schaefer-Kehnert, Dr. Gittinger and Mr. Zimmer-Vorhaus of the EDI of World Bank for their assistance and cooperation.

本文基于工程经济的动态分析原理,研究了灌溉项目经济分析的“多指标综合评价法”。这个方法能够就一个项目对国家、集体和农民在经济上是否有利给出定量评价,可以就兴办项目后国家在财政上的回收和农户的实际收益进行定量分析,并为按照促进经济增长、群众可能负担的目标去制订水费,提供基本依据。对于灌溉项目分析中的收支科目和定价,以及经济评价的标准,本文也提出相应的建议。并为本法的应用提供了示例。

The greater part of northwest, north and Inner Mogolia in Chinafalls into the arid and semiarid areas where the annual precipitation isscant and its distribution is also extremely uneven with frequent rain-storms in summer. Rivers there often carry large amount of sedimentbecause of serious soil erosion in many areas, and the amount of sedi-ment in the major tributaries in particular in the middle and upperreaches of the Yellow River is several hundred kilograms per cubic me-ter in general, with a maximum amount...

The greater part of northwest, north and Inner Mogolia in Chinafalls into the arid and semiarid areas where the annual precipitation isscant and its distribution is also extremely uneven with frequent rain-storms in summer. Rivers there often carry large amount of sedimentbecause of serious soil erosion in many areas, and the amount of sedi-ment in the major tributaries in particular in the middle and upperreaches of the Yellow River is several hundred kilograms per cubic me-ter in general, with a maximum amount of one thousand kilograms aboveper cubic meter.Rivers carry such higher amount of sediment that many modern big-and medium-sized irrigation system by gravity can not be put into opera-tion for along time because of the sedimentation of channels or canalsapart from diverting flood water for siltation and irrigation in someshallow mountain areas. For instance, there was such a regulation thatthe sediment content was over 15% (the weight ratio being about 166kg/m~3) and the irrigation was not practised in Shaanxi Province so thatthere had always been a serious yield reduction or even no yield at allof summer crops because of water shortage. On the other hand, theflood water carried large amount of sediment rushes down to the lowerreaches, which will cause the siltation of reservoirs and river courses,seriously affecting the normal exertion of effects of water conservationfacilities and bringing about great difficulty to the control of floods ofthe lower reaches of river courses with the Yellow River in particular.This paper mainly emphasizes on the introduction of experience ondiverting flow with hyperconcentration of sediment in Shaanxi Provincesince 1976 in particular within recent ten years.It has been confirmed that the measures to overcome and improvethe problems of siltation of channels or canals as well as the diversionof f1ood water for si1tation and irrigation to increas e production have been in the main grasped through a large number of the laboratory andfield experiments. Therefore, this will form the basis for the futurecarrying out of diverting flood water for siltation and irrigation on alarge scale.The author of this paper holds that making the fullest use of waterresources in a rational and planned way is an effective, immediate andless expensive way to solve the problem of water shortage and drynessin summer for raising agricultural production, and this will also playan im ortant part in changing harm into benefit. And hence, thisis a major link of comprehensive control of the silt ladden rivers.

我国西北、华北和内蒙等省区,其中大部分属于干旱半干旱地区,年降雨量稀少,且时空分布极不均匀,夏季多暴雨。许多地区由于水土流失严重,河流含沙量很高。特别是黄河中上游地区其干支流的含沙量,一般为每立方米数百公斤,最高可达一千公斤以上。 河流具有这样高的含沙量,致使长期以来,除了浅山区有引洪淤灌的习惯外,许多近代大中型自流灌区,皆因渠道淤积的原因而不敢引用;例如陕西省曾有含沙量超过15%(重量比,约为166公斤/立米)就关闸停水的规定,以致夏季作物,由于干旱缺水而严重减产或绝产。另一方面,含大量泥沙的洪水涌入下游,对水库和河道造成淤积,严重影响水利设施效益的正常发挥,对河道下游,例如黄河的防汛工作带来极大困难。 本文着重介绍近十年,特别是1676年以来,陕四省高含沙引水淤灌工作的经验,认为几年来通过大量的室内外研究,已经基本上掌握了促进作物增产的田间淤灌技术,以及克服或改善渠道淤积的措施。因而为今后大规模开展引浑淤灌工作奠定了基础。 本文作者认为,有计划、充分合理地利用高含沙洪水的水沙资源,来缓和该地区夏季农业干旱缺水为农业增产服务,是一个投资少、见效快、效益大的有力措施。在当前水土流失不能有效控制的情况下,引浑淤...

我国西北、华北和内蒙等省区,其中大部分属于干旱半干旱地区,年降雨量稀少,且时空分布极不均匀,夏季多暴雨。许多地区由于水土流失严重,河流含沙量很高。特别是黄河中上游地区其干支流的含沙量,一般为每立方米数百公斤,最高可达一千公斤以上。 河流具有这样高的含沙量,致使长期以来,除了浅山区有引洪淤灌的习惯外,许多近代大中型自流灌区,皆因渠道淤积的原因而不敢引用;例如陕西省曾有含沙量超过15%(重量比,约为166公斤/立米)就关闸停水的规定,以致夏季作物,由于干旱缺水而严重减产或绝产。另一方面,含大量泥沙的洪水涌入下游,对水库和河道造成淤积,严重影响水利设施效益的正常发挥,对河道下游,例如黄河的防汛工作带来极大困难。 本文着重介绍近十年,特别是1676年以来,陕四省高含沙引水淤灌工作的经验,认为几年来通过大量的室内外研究,已经基本上掌握了促进作物增产的田间淤灌技术,以及克服或改善渠道淤积的措施。因而为今后大规模开展引浑淤灌工作奠定了基础。 本文作者认为,有计划、充分合理地利用高含沙洪水的水沙资源,来缓和该地区夏季农业干旱缺水为农业增产服务,是一个投资少、见效快、效益大的有力措施。在当前水土流失不能有效控制的情况下,引浑淤灌可以起到变害为利的作用,它也是对多泥沙河流

 
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