irrigation district 中文意思是什麼

irrigation district 解釋
灌溉區
  • irrigation : n. 1. 灌溉；水利。2. 【醫學】沖洗（法），〈pl. 〉沖注洗劑。adj. -al ,-ist n. 灌溉者，水利專家。
  • district : n 1 區；管區；行政區，市區。2 地區，區域。3 〈美國〉（各州眾議員）選舉區；〈英國〉教區，分區。vt ...
  1. Irrigation district water - measuring is the important method and guarantee of practising using water planly, assignment accurately, using irrigation water equably and meterage

    灌區量水，是實行計劃用水、正確分配、合理使用灌溉水的重要手段，是實行計量收費的重要保證。
  2. When the area of little irrigation district is constant, drip line of trickle irrigation has the optimizing length. if the length of drip line is longer or shorter than the optimizing length, the expense of trickle system increases

    一般認為，毛管長度越長，則滴灌系統造價相應就會減少，因此，在優化設計時，通常認為毛管取最大長度。
  3. Many factors have effect on irrigation uniformity. with the growing of pressure, how is irrigation uniformity of trickle irrigation varying on different condition of the diameter of drip line, the distance of emitters, the length of drip line, the style of emitters, the flux ratio of emitters and the face gradient of little irrigation district. the consequence shows that pressure has puny effect on irrigation uniformity

    滴灌系統的灌水均勻度受眾多因素的影響，本文通過毛管的管徑、滴頭間距、毛管的管長、灌水器的類型和灌水器的流量系數不同的情況下，灌水均勻度隨壓力水頭變化模擬結果顯示，壓力水頭對灌水均勻度影響非常小。
  4. 4 in order to make. the decision adjust to the practice, and use the limited water resources more rationally. a multi - objective fuzzy decision method for irrigation district is presented considering fuzzy connection, then a method is given to get the changeable objective weight of each stage. this model can solve the decision in conjunctive use of ground and surface water

    4 、為合理利用水資源，使渠井結合灌區的地表、地下水聯合調度決策與實際結合更緊密，本文在陳守煜建立的多指標模糊關系優選決策理論基礎上，提出了考慮時段指標變權重的多指標模糊關系優選決策方法，模型中各指標的權重隨作物所處生長階段的不同發生變化，並將模型與演算法應用於實際例子中，取得了較為滿意的結果。
  5. Taking this large irrigation district as a reference, this paper studies the optimal scheduling of water resources in this district, mainly considering such problems as degrading dimensions of the decomposition - coordination for big system and optimal decision - making of multiple purpose

    本文以大型灌區為對象，研究了灌區水資源的優化調配問題。主要考慮了大系統分解?協調遞階模型的降維、多目標優化決策等問題。
  6. Then, how should we determine the average amount of dripper in little irrigation district ? an operational measure is to make average pressure position of drip line certain and determine the flux of emitters in average pressure position

    在灌水小區內，能夠準確及時的測定灌水小區內灌水器的平均灌水量，才能精確控制灌水小區的灌水量。
  7. On the contrary, the length of drip line, the diameter of drip line, the distance of emitters and the face gradient of little irrigation district have remarkable effect on irrigation uniformity

    在田間工程中，毛管長度、毛管的管徑、滴頭間距和地形坡度對灌水均勻度影響非常顯著。
  8. When other factors are unchangeable, with the growing of the diameter of drip line and the distance of emitters, irrigation uniformity of trickle system is increasing. the face gradient of little irrigation district has complex effect on irrigation uniformity. in a word, we tries our best to make the face of little irrigation district flat in order to improve the quality of drip - irrigation system

    灌水均勻度由某一因素決定，而其它因素不變的條件下，隨管徑增大，滴灌系統的灌水均勻度增大；隨滴頭間距增大，灌水均勻度也在增大；地形坡度對灌水均勻度影響比較復雜，為了提高低壓滴灌的灌水質量，土地必須整平。
  9. Abstract : in this paper, the application of splitting grouting method to danger removal and dam reinforcement in pishihang irrigation district, is illustrated and the engineering effect is introduced too

    摘要:文章介紹劈裂灌漿法在淠史杭灌區堤壩除險加固過程中的應用和取得的效果。
  10. Study on automation for hydrologic monitor of headwork of xiaohe irrigation district

    山西省瀟河灌區渠首樞紐工程水文監測自動化研究
  11. In order to adapt the demands of market economy, reformation of administration system in irrigation district is fully executed. one of the important symbol is levying water - rate by quantity having substituted levying by mu. this requires measuring water should be carried out thoroughly, especially in sublateral canals and field ditches

    為了適應市場經濟的要求，灌區管理體制的改革正全面展開，其中一個重要標志就是改以畝計征水費為按量計征水費，這就要求灌區量水，尤其是斗、支渠必須全面實施。
  12. Discussion on management system reform in hetao irrigation district

    河套灌區灌溉管理體制改革探討
  13. Zoning and mode of agricultural water saving in hetao irrigation district of ningxia municipality

    寧夏河套灌區農業節水分區與模式
  14. Analysis and study of regional evapotranspiration taking yonglian test area in hetao irrigation district for exmaple

    以河套灌區義長灌域永聯試驗區為例
  15. On the basis of general introduction of the all - american canal system and the all - american canal irrigation district, the facilities ( dams, desilting works, irrigation canal system ), project management and maintenance, and benefits of all - american canal system were de scribed and analyzed in detail

    摘要在介紹全美灌溉系統及全美渠灌區基本概況的基礎上，對全美灌溉系統的主要建築物（水庫大壩、沉沙工程、灌溉渠系） 、工程管理與維護以及工程所帶來的經濟效益等方面作了詳細闡述與分析。
  16. ( 2 ) aiming at the bigger irrigation quota of fall irrigation system and the complicacy of the salt movement in soil, the paper applies reservoir leaching model bring forwarded by w. h. van der molen to hetao irrigation district located in aridity area, and establishes salt leaching simulational model under the fall irrigation system. through calculating, the feasible fall irrigation quota is 100 - 120m2 / 667m2 in light salinization soil, and the feasible fall irrigation quota is 120 - 150 m2 / 667m2 in mild salinization soil. the model is reasonable and exact, and it can be researched deep

    （ 2 ）針對在秋澆灌溉制度中秋澆定額較大，土壤中鹽分運移規律復雜的特點，利用w ? h ? vandermolen提出的水庫沖洗模型，建立了地處乾旱地區的河套灌區區域內的秋澆制度鹽分淋洗模擬模型。經計算在輕度鹽漬化土壤中秋澆的灌溉定額以100 120m ~ 3 667m ~ 2為宜；中度鹽漬化土壤秋澆的灌溉定額以120 150m ~ 3 667m ~ 2為宜，模型合理可靠，準確可行，可進一步向縱深方向進行研究。
  17. Thinkings of weishan irrigation district reforming

    對位山灌區改革的幾點思考
  18. Practice of water pricing reform in weishan irrigation district

    位山灌區水價改革實踐
  19. Some envisions of reformation irrigation district in beijing

    西寧地區草坪灌溉制度與灌水技術的確定
  20. Application of nucleon density gauge in water - saving construction project of mawan irrigation district of shandong province

    核子密度儀在麻灣灌區節水改造工程中的應用
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