查询词典 irrigation engineering

Numerical model of border or furrow irrigation flow movement is a necessary tool and approach to design and evaluate surface irrigation systems.

数值模拟畦灌水流运动过程可为地面灌溉系统设计与评价提供必要的工具和手段。

A simplified analytic model of border irrigation on the basis of water balance principle was set up and testified by some research results and field experiments. Results show that the model is simple and accurate, which can be used to determine the reasonable technical index of border irrigation.

结合已有文献资料和田间试验对模型进行检验，表明该模型具有计算求解方便、精度较高的优点，可用于畦灌合理灌水技术指标的确定。

Based on the field experiments, the daily variations of photosynthesis rate and transpiration rate and water use efficiency were compared on the condition of sprinkle irrigation and border flooding irrigation.

通过定点定位试验，比较了喷灌与常规畦灌条件下农田生态环境、冬小麦光合速率和蒸腾速率的日变化特征以及不同水平的水分利用效率。

The one-dimensional complete hydrodynamic model for border irrigation based on the hybrid numerical method can obviously increase computational stability and convergence, and effectively improve computational precision and efficiency, and provide a good numerical simulation tool for the design of border irrigation system and performance evaluation.

基于混合数值解法的一维畦灌全水动力学数值模拟方法可明显增强数值计算的稳定性和收敛性，有效提高了计算精度和效率，为开展畦灌系统设计与性能评价提供了可靠的数值模拟手段。

The curve of drip irrigation's soil moisture content with corn's stage was smoother than that of border and furrow irrigation.

播前玉米地土壤含水率随土层深度增加而增加，收获后土壤含水率则随土壤深度的增加而减小。

Border irrigation current advancement process model plays an important role to determine irrigation technical index, average field infiltration rate and roughness coefficient.

畦灌水流推进过程计算模型对确定灌水技术要素、田间平均入渗率和糙率有十分重要的作用。

The model simulates all phases of continuous and surge flow irrigation including simultaneous advance and recession and can also be ap- plied to basin and border irrigation with various field slopes.

。该模型模拟所有阶段的连续波涌灌溉方式，包括同步前进，经济衰退也能是溶质灌溉与各领域的斜坡盆地和边界。

The moisture content of drip irrigation soil was lower than border and furrow irrigation below 40cm.

滴灌对垂直深度55cm以下深层土壤水分影响甚微。

County is located in Hebei Plain, light and heat sufficient underground water is rich in beneficial irrigation, another benefit Shijin irrigation drainage and agriculture is developed.

县境位于河北平原，光热充足，地下水丰富，利于井灌，又有石津渠灌溉之利，农业发达。

In the experi- ment and practice m the zhongwei North Main Canal of the Hetao Irrigation District, a cheap and quick functioned slope protection method of soil and grass mixture for tree planting has been searched for de- sign and construction of irrigation canal and drainage in the desert region.

河套灌区在中卫北干渠进行了试验，在沙漠建渠道，用人工和植物固沙，沙漠区排水沟道的设计则充分考虑水流冲刷，对沟道防坍塌摸索了一条花钱少、见效快的草上植柳护坡办法，并在灌区内植树造林以固沙。

We are forbidden from giving money to these shoeless, skinny children, as this will perpetuate begging.

向光着脚，骨瘦如柴的孩子施舍是不可以的，因为要招来无休无止的乞讨。

It would be hard not to fall victim to some sharpeyed policeman.

要想不被某个目光锐利的警察抓到，谈何容易。