灌溉保证率

研究建立了荆州市耕地地力评价指标体系，选取了有机质、有效磷、速效钾、有效锌、质地、pH、剖面构型、地貌类型、成土母质、灌溉保证率和排涝能力11项指标。

The system have 11 indicators , including the organic matter , phosphorus , potassium , zinc and effective , texture , pH , profile configuration , landform type , soil parent materials , guaranteed rate of irrigation and drainage capacity .

根据CRT值法则和涿鹿县具体情况，采用特尔菲法，确定了分等因素指标集，该因素指标集包括：坡度、有效土层厚度、灌溉保证率、有机质、质地、盐渍化、剖面构型七个主要因素。

According to the CRT rule and the concrete situations of ZhuoLu County , the grading standards included seven main factors ( slope , soil body thickness , condition of irrigation , O.M. , soil texture , salt-status , soil body configuration ) .

灌区灌溉保证率的概念及其计算

Conception of the Irrigating Guarantee Rate of Irrigated Area and Its Calculation

灌溉保证率的优选及其经济论证襄屯灌区喷灌示范工程设计

Optimization on the Design Probability of Irrigation Works and Its Economic Demonstration

筛选模型用以初定灌区的大致范围，长系列优调模型是在筛选的基础上确定符合灌溉保证率的灌区规模。

The screen model determines primary irrigation scale and , based on the primary scale , the long-run optimal operation model determines the irrigation scale that conforms to irrigation guarantee rate .

二等地占9.86%，这类耕地分布较为零散，土壤类型多为中壤土，灌溉保证率高，养分贮量较高，耕地状态较好，无旱涝盐渍化威胁，生产压力小。

The second class land occupies 9.86 % , which exist scattered in space . Their irrigation guarantee rate and nutrient storage are very high . The soil texture is middle loam . They have no threat of drought and salinization and little producing pressure .

农田水利工程设计：灌溉设计保证率为75%。

Hydraulic farming engineering design : irrigation design reliability is 75 % .

随机存贮模型在新疆内陆干旱区灌溉设计保证率优化设计中的应用

Application of the Random Inventory Model To the Optimal Design for Guaranteed Frequency of Irrigation Design in The Inland Arid Area in Xinjiang

只要加大农业科技投资力度，保持现有灌溉面积不减少，提高灌溉保证率，2020年我国粮食自给率也可达到91%左右的水平；

As far as investment in agricultural technology is reinforced , irrigation area is maintained at the current scale , and irrigation assurance ratio is upgraded , by 2020 China will achieve a grain self-sufficiency ratio of 91 % .

结合射阳试验站冬小麦的咸淡水灌溉试验，分别计算了不同灌溉设计保证率下的最优灌溉制度，为当地微咸水资源的利用及咸、淡水灌溉制度管理提供了理论指导。

4 . With winter wheat 's irrigation experiment of salty and fresh water in sheyang experiment station , calculate the optimum irrigation system in different design guaranteeing rate , offere the theoretical direction for the utilize of local brackish water resources and the management of salty-fresh water irrigation .

灌区灌溉设计中，常用降雨量进行频率分析来选取灌溉设计保证率及其对应典型年。

Rainfall frequency analysis is used commonly to determine probability of irrigation water requirement , and to choose typical years for irrigation project design .

灌溉供水可靠度是评价灌溉设计与管理的重要指标，但现行的灌溉保证率指标由于不能反映灌溉供水的时间效应和程度效应，评价结果与实际相差较大。

Irrigation water supply reliability is a main criterion of evaluating irrigation planning and management . The evaluation result of present irrigation firm probability index is far from the reality due to its inability to reflect irrigation water 's time effect and deficiency degree effect .