干渠是主水渠，渠系中主要用于输水的输水渠道，作为支渠水流的主要来源。
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盘道岭隧洞是引大入秦灌溉工程总干渠上最长的无压引水隧洞。
The Pandaoling tunnel is the longest non-pressure diversion tunnel of the main channel from Datong river to water irrigation project at Qinwangchuan region.
精河大型灌区续建配套与节水改造工程精河南干渠改造改线措施运用。
Jinghe county large irrigation areas and water conservation improvement works fine line Henan Canal reform measures and the use are introduced.
地表水主要来源于降水及客水，降水以汛期降雨为主，客水主要来源于老沙河、宋八疃、沙东干渠。
Surface water mainly from precipitation and off the water, precipitation, rainfall in the main flood season, water comes mainly from the old passenger Shahe, Song eight Tuan, sand east of the trunk.
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