灌溉工程

Water-saving irrigation ; engineering water-saving techniques ; agronomic water-saving techniques ; status ; development trend

节水灌溉；工程节水；农艺节水；技术；现状；趋势

This paper has made systematic research about characteristics of soil water dynamic changes, water deficit of the root-zone of pear-jujube tree with regulated deficit irrigation, physiological control in the process of the water use and the stomal response mechanism of pear-jujube tree under the water deficit environment, and the effects of different deficit irrigation levels at different growth stages vegetative growth and repproductive growth of pear-jujube trees, and also its regulation mechanism.

针对西北半干旱区果业生产面临水资源紧缺的现实，论文以该区特色经济果树梨枣树为研究对象，在西北农林科技大学旱区农业水土工程教育部重点实验室、陕西省大荔县城关镇梨枣园分别开展了温室与大田试验，对调亏灌溉的梨枣树根区土壤水分动态变化特征、水分亏缺与复水环境下梨枣树用水过程、生理调控与气孔响应机理、不同生育期不同水平亏水处理对营养生长与生殖生长的影响及其调控机制等进行了较系统的研究，分析了各生育期不同亏水处理对梨枣耗水规律、产量、品质、作物系数、水分利用效率及经济效益的影响，取得了以下成果：⑴通过亏水处理与复。。。

Through 40 years' operation, the resources of Zhanghe River is gradually reduced, and Majiayan Reservoir is the supplementary works for the Red-flag Channel.

红旗渠是林州市引漳入林灌溉的一项重要水利工程，经过四十年的运行，漳河水源逐渐减少，马家岩水库是红旗渠的补源工程。

So it created a negative effect that water using efficiency is low and the gross benefit is so poor in the area .

灌区自身水资源短缺，供需矛盾十分突出，而入鲁引水流量规模小(30立方米／秒)、控制灌溉面积大(200万亩)、节水工程少，更加剧了灌区水资源供需紧张的矛盾。

In 1968 extensive research on direct potable reuse was conducted in Windhoek, Namibia.

自1960年以来，迫于调整压力和水的缺乏，一份深入的调查结果给水再利用工程的健康风险和治疗系统提供了有价值的洞察力。1965年，以色列健康部门出版章程允许对农作物灌溉实行二次污水再利用，还有被排除在外的不用煮可以吃的蔬菜作物。1968年在温得和克和纳米比亚对直接可饮用的再利用进行了广泛的研究。1972年在美国，有一件重要事件就是通过了联邦水污染控制法案（PL92－500）&修复并且维持民族水资源的化学，物理和生物的完整性。&

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了