irrigated time 中文意思是什麼
irrigated time
解釋
灌溉時間-
But conventional furrow irrigation is difficult to meet the demands that crops are irrigated at proper time and with suitable amount of water
但常規溝灌很難滿足灌溉過程中對灌水適時、適量的要求。 -
At the same time the study analyse the structural system of the index and it ' s weight with the ahp, and choose soil quality, soil thickness, the content of organic matter, terrain, elevation and the ration of irrigated guarantee as gradation index and choose soil quality, soil thickness, the content of organic matter, terrain, elevation, the ration of irrigated guarantee, the condition of traffic, the distance from the central city, the scatter degree of field, the neat degree of field, loss of water and erosion of soil and land contamination as classification index. at the same time the study emphasize the effect of the condition of ecological condition and environmental contamination
採用層次分析法對該區域農用地分等定級的指標體系及其權重進行了研究，選擇表層質地、土層厚度、有機質含量、地形、海拔、灌溉保證率等6項指標參與分等評價，選取表層質地、土層厚度、有機質含量、地形、海拔、灌溉保證率、對外交通狀況、距市中心距離、田間道路狀況、田塊分散度、地面平整度、水土流失、土地污染等13個因子分指標區進行定級評價，強調了生態條件及其環境污染狀況在農用地分等定級中的作用。 -
The best irrigation system can instructs the best distributed water quantity and the irrigated time under the condition of lacking water. thus, we can obtain the maximum relative yield and the least loss
優化的灌溉制度可用於指導在不同的缺水程度下如何在時間上定量分配水量，以使相對產量最大，減產損失最小。 -
The usage quantity of chemical fertilizer and diesel 0 : 1take the first place in our province, the effective irrigated area is ninety percent of the cultivated area with the development of the economy and the improvement of the quality of the people who are engaged in agriculture, the agricultural production also changes : one aspect is the number of the labours who are engaged in agricultural prosecution is decreasing year by year. the labours of the rural areas are liberated from farming step by step and more and more labours take up the third industries and processing industries of the agricultural products and so on. the agricultural production calls for saving cost, racing against time and decreasing consumption. the other aspect is the quality of the people who are engaged in the agricultural production has some changes, that is the number of the labours whose ages are below 25 is
隨著經濟的發展和從業人員素質的提高農業生產也發生了變化，一方面人力投入糧食生產的比例在逐年下降，從事農業生產的農村勞動力逐年縮少，農村勞動力逐步從農業勞作中解放出來，走向農村第三產業和農產品加工行業等等，農業生產也隨時要求實現節本、爭時、減耗;同時，農業生產中一家一戶小規模生產經營方式和產業結構調整帶來的「插花地」的種植模式，使常規的保護性耕作措施不能完全適應現代農村農業生產的實際需要，結合秸稈還田以耙耕或旋耕代替傳統的鏵式犁翻耕是當前農業生產最為適宜的耕作方式。 -
With the using of microsoft visual basic 6. 0, a multimedia computer - aided design system of small type pumping irrigation district is developed in this paper. provided with the live multimedia messages as well as a good man - machine conversation mechanism, this system can help the user to finish the planning of an pumping irrigated area such as the layout of canal system, the selection of pump models, the establishment of the irrigation program, the calculating of canals " parameters, the estimate of the project magnitude, the selection of the field constructions, the economic analysis of the project, the output of results, etc, a new oo ( object oriented ) programming method is adopted in this system, various softwares are integrated in this systems as well by the " automation " technic provided by vb, in addition, the multimedia technic is applied to this system for the first time, it makes the system easy to ope rate. as for the optimization of the canals " section, a new optimization method is adopted based on the existing theories about the canals " section, and in this way, with the purpose of minimizing the project ' s investment as well as a stalized canal, limited by the longituding slope, the canals " best feasible parameters can be deduced. furthermore, a integral method to reckon the earth work is developed in this paper, by this way, the estimate precision of the earthwork is enhanced notably. this paper includes the particular illumination for the developing procedure of each systems " segment, and in the end, the directions of the system are demonstrated in a sample area which lies in the zhaija village, taizhou city, jiangsu province, the running results showed that the initial purposes are achieved effectively, and it has a preferable practicability
在渠道縱橫斷面優化方面，本文在利用已經比較成熟的縱橫斷面優化理論的基礎上，提出以工程總費用最小為目標函數，以渠道縱坡i為控制變量，以渠道不沖不淤流速及灌區允許地面比降為約束條件，通過縱橫斷面聯動優化的方法得到渠道的最佳工程可行的斷面參數。另外，針對部分地區的取土困難的狀況，本文採用積分法計算渠道工程土方量，從而大大提高了土方量的估算精度，有助於準確控制工程投資規模及資金投向。本文詳細闡述了該系統所採用的編程方法、系統構成、系統各組成模塊的開發過程以及灌區規劃所採用的優化方法及原理，最後應用本系統對泰州市翟家村機電灌區進行規劃設計，運行結果證明其操作比較簡便，界面友好，運行速度快，規劃成果合理，基本達到了系統預定的要求，具備較強的實用性。 -
Water delivery has been run over 30 years. the main canal has the problem that the actual conveying capacity is very low now and the conveying capacity of the east - one main canal i only half of the design value, this lead to guaranteed real - time efficiency of the irrigation of the farmland recede greatly. the downstream has no water and crops were drought to death have been seen more times in the irrigation period, this lead to the contradictory between the upstream and downstream on water usage, moreover, the lower discharge capacity of the dry canal in irrigation period is the main cause of the actual irrigated area is only half of the design value
經過三十年的輸水運行，目前乾渠工程存在嚴重的輸水能力低問題，其中東一乾渠輸水能力只能達到原設計的1 2 ，使農田的適時灌溉保證率大大降低，多次發生灌溉期下游見不到水而旱死莊稼的情況，造成上下游用水矛盾突出，而且灌溉期乾渠過流能力偏小，是導致實際灌溉面積僅為設計值的1 3的重要原因。 -
At the same time, poor irrigation and drainage practices have led to salt buildup in roughly one - eighth of all irrigated land
與此同時，不良灌溉和排水已造成大約八分之一的灌溉土地上堆積了鹽分。 -
In the dissertation, the problems of the current irrigation forecasting models and methods are put forward. considering spatial variation in soils, a real - time forecast model of irrigation schedule at irrigated area scale is studied, so as to provide an approach for the more suitable decision support system of irrigation forecast and water management system
本文針對國內外現有的灌溉預報方法和模型存在的問題，考慮灌區土壤墑情空間變異特性，對灌區尺度的實時灌溉預報模型進行了研究，旨在提出適合我國灌區情況的灌溉預報決策支持系統和現代化灌區用水管理系統的實時灌溉預報方法。
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