1) irrigate and drain channel
灌排渠系
2) irrigation and drainafe ditch
排灌沟渠
4) irrigation canal system
灌溉渠系
1.
Optimal water allocation marshalling model of multilevel irrigation canal system and model Solution;
多级灌溉渠系配水优化编组模型与算法研究
2.
Fractal features of irrigation canal system in irrigation district;
灌区灌溉渠系分形特征研究
3.
Layout forms of irrigation canal system can be generally classified as three categories: series wound canal system, equivalent shunt wound canal system and nonequivalent shunt wound canal system.
灌溉渠系的布置形式一般可分为串联渠系、等效并联渠系和非等效并联渠系 ,对这 3种灌溉渠系水利用系数进行了理论研究。
5) agricultural ditch systems
排水渠系
1.
In the process of wetlands exploitation, agricultural ditch systems are widespread and cause ecological and environmental impacts on landscape in two ways.
天然湿地开垦为农田,排水渠系扩张,随之带来两个方面的生态环境影响。
6) irrigation and drainage system
灌排系统
1.
Applied study of satellite image in identification of irrigation and drainage system;
卫星遥感影像在农田灌排系统识别中的应用研究
2.
According to the characteristics of the large -investment and vast -area of the large -sized irrigation and drainage systems and the possibility of national investment, several problems and strategies for the canal seepage control, irrigation systemization, and drainage system reform in the practice are propos.
“十五”期间,我国大型灌区灌排系统工程改造取得了良好的经济效益、节水效益和减灾效益,成果十分显著。
补充资料：灌排结合泵站
灌排结合泵站
pump station for both irrigation and drainage
guanPai jiehe bengzhan灌排结合泵站(pump station for bothirrigation and drainage)既能灌溉又能排水的抽水站。一站两用灌排结合可以提高设备利用率和单位功率效益。 灌排结合泵站建筑物的布局型式很多，它与灌溉、排水的要求及当地地形、水源情况、投资能力和运行方式有密切关系。在规划设计时要尽量考虑既能抽水灌排又能自流灌排。 图示为一自流排水为主的灌排结合泵站的平面布置图。当外河水位低于排水干沟的水位时，打开自流排水闸和节制闸，排水区的积水即可自流排出;当外河水位高于排水干沟水位时，则应关闭自流排水闸，启动水泵机组，通过排水管将积水排至外河。当需引河水进行灌溉时，打开进水闸，关闭节制闸，启动水泵机组，抽水进入出水池，通过灌溉干渠，将水送至灌区。这是一种闸站分建式的灌排结合泵站。此外，还有闸站合建式的灌排结合泵站和正向抽排反向扬水灌溉的灌排结合泵站。 规划设计灌排结合泵站时，要处理好以下几方面的问题:①合理地选定站址和建筑物布局;②根据灌出水池灌溉干染言泄区(水源)┌─┬─┐│ │ │└─┴─┘灌排结合泵站示意图排主次并结合泵型正确地计算水泵安装高程;③灌溉结合泵站的机组数目不宜过多;④灌溉及排水扬程相差较大时，应分别修建高低两个出水池，灌排分开;⑤妥善布置泵房内部的机电设备及管道。 (陈固)
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参考词条