双泉堰是陕西省南郑县濂水河系范围内一个较大的泉水灌区,因堰首有二泉而得名。灌区农作物一年两熟,水旱轮作,夏季全系水稻,冬季有小麦、大麦、油菜、蚕豆及绿苕等。灌溉水源主要是泉水,但常年流量极小,仅有0.165秒立方米,而灌溉面积 Shuangquan weir is Nanzheng County, Shaanxi Province, within the scope of a large spring water irrigation area, because of the first weir weir named. Irrigated crops twice a year, drought and rotation, the whole system of rice in the summer, winter wheat, barley, rape, broad bean and mulberry and so on. Irrigation water is mainly spring, but perennial flow is very small, only 0.165 seconds cubic meters, and irrigated area