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   check-dam 在 农业基础科学 分类中 的翻译结果: 查询用时:0.066秒
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check-dam    
相关语句
  淤地坝
    This paper introduced research results and future’s research trend in the field of check-dam construction in our country.
    本文阐述了我国淤地坝建设领域的研究成果和今后的研究趋势。
短句来源
    On the basis of investigating the present check-dam construction on the sport in Yan’an city, we find out exactly the quantity and summarize the important experiences of the present check-dam construction in the whole city.
    在对延安市淤地坝建设状况的实地考察的基础上,准确地摸清了延安市现状淤地坝建设的数量,总结出延安地区淤地坝建设的重要的经验。
短句来源
    Taking science and technology as support, plan and design check-dams scientifically, and rightly evaluate the comprehensive benefits of check-dam;
    以科技为支撑,科学规划和建设淤地坝,正确评价淤地坝的综合效益;
短句来源
    The work that this paper does, enriches the contents and method of region check-dam planning to some extent.
    本论文所做的工作,在一定程度上丰富了区域淤地坝规划的内容与方法。
短句来源
    It has a certainly referenced function for other regions check-dam planning in loess plateau.
    对于黄土高原其它地区的淤地坝规划工作有一定地借鉴作用。
短句来源
  淤地坝
    This paper introduced research results and future’s research trend in the field of check-dam construction in our country.
    本文阐述了我国淤地坝建设领域的研究成果和今后的研究趋势。
短句来源
    On the basis of investigating the present check-dam construction on the sport in Yan’an city, we find out exactly the quantity and summarize the important experiences of the present check-dam construction in the whole city.
    在对延安市淤地坝建设状况的实地考察的基础上,准确地摸清了延安市现状淤地坝建设的数量,总结出延安地区淤地坝建设的重要的经验。
短句来源
    Taking science and technology as support, plan and design check-dams scientifically, and rightly evaluate the comprehensive benefits of check-dam;
    以科技为支撑,科学规划和建设淤地坝,正确评价淤地坝的综合效益;
短句来源
    The work that this paper does, enriches the contents and method of region check-dam planning to some extent.
    本论文所做的工作,在一定程度上丰富了区域淤地坝规划的内容与方法。
短句来源
    It has a certainly referenced function for other regions check-dam planning in loess plateau.
    对于黄土高原其它地区的淤地坝规划工作有一定地借鉴作用。
短句来源
  淤地坝
    This paper introduced research results and future’s research trend in the field of check-dam construction in our country.
    本文阐述了我国淤地坝建设领域的研究成果和今后的研究趋势。
短句来源
    On the basis of investigating the present check-dam construction on the sport in Yan’an city, we find out exactly the quantity and summarize the important experiences of the present check-dam construction in the whole city.
    在对延安市淤地坝建设状况的实地考察的基础上,准确地摸清了延安市现状淤地坝建设的数量,总结出延安地区淤地坝建设的重要的经验。
短句来源
    Taking science and technology as support, plan and design check-dams scientifically, and rightly evaluate the comprehensive benefits of check-dam;
    以科技为支撑,科学规划和建设淤地坝,正确评价淤地坝的综合效益;
短句来源
    The work that this paper does, enriches the contents and method of region check-dam planning to some extent.
    本论文所做的工作,在一定程度上丰富了区域淤地坝规划的内容与方法。
短句来源
    It has a certainly referenced function for other regions check-dam planning in loess plateau.
    对于黄土高原其它地区的淤地坝规划工作有一定地借鉴作用。
短句来源
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  check-dam
Check-dams are effective measures for soil and water conservation; concomitantly check-dam planning and construction urgently require current land use maps.
      


At present the chech dam for building farmland constructed in loessarea,generally,is designed and checked according to the oppotunity of onetime in 10 year and one time in 30 years respectively,which has been dem-onstrated in practice to be lower and thought as the major reason to causedam bursting.Having been studied,the optimum designed standard of floodis one time in 20 years and one time in 50 to 100 years for designed floodand flood check respectively.On total consumption of money and material,it will save...

At present the chech dam for building farmland constructed in loessarea,generally,is designed and checked according to the oppotunity of onetime in 10 year and one time in 30 years respectively,which has been dem-onstrated in practice to be lower and thought as the major reason to causedam bursting.Having been studied,the optimum designed standard of floodis one time in 20 years and one time in 50 to 100 years for designed floodand flood check respectively.On total consumption of money and material,it will save 15-20% of that,compared with the two adjucent standard ofdesigned flood.It is suggested that the major engines of the check dam bedesigned on the standard of one time in 25 years,and checked on one timein 100 to 300 years,if done as this,it would be economical.

目前,黄土地区修建的淤地坝,一般按10年一遇的防洪标准设计,30年一遇的洪水校核。实践证明,这一设计标准偏低,是造成溃坝的主要原因。通过分析计算,适宜的设计洪水标准,是20年一遇的洪水设计,50—100年一遇的洪水校核。从总消耗费用检查,它将比相邻的两种设计洪水标准的总消耗费用少15—20%。对于淤地坝的骨干工程,建议采用25—30年一遇的洪水设计,100—300年一遇的洪水校核,比较经济。

This paper discusses the measures of rational land use in the Loess Plateau of Northern Shaanxi Province. The following measures and recommendations are suggested. Adjusting land use. The key issue is that current land use is not based on land suitability in the study area.Emphasis.must be given to changing land use according to land suitability and local social and economic conditions. Because of the erosion hazard, land should be used for farmland when slopes exceed 15°. The steep cultivated slopes must be...

This paper discusses the measures of rational land use in the Loess Plateau of Northern Shaanxi Province. The following measures and recommendations are suggested. Adjusting land use. The key issue is that current land use is not based on land suitability in the study area.Emphasis.must be given to changing land use according to land suitability and local social and economic conditions. Because of the erosion hazard, land should be used for farmland when slopes exceed 15°. The steep cultivated slopes must be abandoned in favour of sown grass and planted trees. Engineering techniques in arable lands. In order to reduce soil erosion and water loss, farmland should include irrigated lands, flood-water sited lands,level terrace fields, check-dam lands, and strip lands in accordance with the regimes of water resources and physical conditions. Check dam need to be constructed along gully beds to retain flood runoff and sediment. Building terraced fields is also a popular way to conserve soil and water. Terraces provide protection from erosion heavy rainfall of up to 40-50mm/24 hours. At the same time, in the terraced fields the output of farm crops for each hectare is usually able that of unterraced sloping lands. Afforestation and sowing grass. Afforestation and sowing grass are major measures to conserve water and soil on the Loess Plateau. Forest should be planted in the mountains and gullies, and grasses and bushes on the slopes. The main kinds of tree and herb are: Caragana sp,locust, poplar, Chinese pine, jujube, pear, apple, alfalfa, sweet clover and Astragalus sp. Grasses and shrubs should be planted first follwoed by an increase in the forest cover. The combination of grass, bushes and trees is the most effective measure to conserve soil and water. Comprehensive management in the small catchment. The problems concerning erosion of hills, rivers, farmland, forests,grassland and roads should be tackled in a comprehensive way. Therefore, The above measures should be implemented in small catchments. Measures taken on the slopes and in the gullies should be coordinated; engineering and vegetative means should be resorted to at the same time; work should be done both to draw benefits and to eliminate hazards. Strengthening land management. We must treasure every inch of land and use it rationally. There is need strictly to implement the land management laws and forestry laws, to ban any excessive timber logging and fuelwood cutting, and to close hillsides and mountains to facilitate afforestation. There are now strict edicts forbidding conversion of forests and grasslands into cropfields; all planned reclamations of land should be carefully appraised and take the environment consequences into account. To encourage afforestation and sowing grass, the state should provide funds for farmers. Thus, the steeply sloping farmlands could be converted into grasslands or forests, decreasing the loss of water and soil erorsion and improving the ecological environment.

本文在土地评价研究的基础上,针对土地利用存在的问题,提出了陕北黄土高原土地合理利用的方向和措施:一是按照土地的适宜性,调整农林牧用地结构,分区建立优化土地利用结构模式;二是造林种草,增加植被,改善生态环境;三是建设基本农田,培肥地力,实现粮食自给;四是小流域综合治理,控制水土流失;五是加强土地管理。

According to the theory of sediment balance, this paper introduces the method and procedure of determining annual soil erosion modulus in a drainage area by measuring the siltation in check dams and pools. By calculation of actual examples, the paper also verifies the feasibility and scientific value of this calculation method. The results

本文应用沙量平衡原理,介绍了利用塘坝淤积量确定集水区内年土壤侵蚀模数的方法与步骤,并以计算实例证实了这种计算方法的科学性和可行性。此法计算结果与用径流小区观测资料推算的结果基本一致,值得在适宜地区大力推广应用。

 
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