阿瓦提丰收灌区零通量面的形成变化规律研究

Study on Change Law of Zero Flux Plane in Awati Good Harvest Irrigation District in Xinjiang

以新疆阿瓦提县丰收灌区为例,通过负压计、地下水埋深监测,研究了在干旱内陆河灌区地面灌溉条件下零通量面形成变化规律和田间水的运动转化过程。分析结果表明:灌溉季节开始前,在地表下100 cm处形成稳定、单一的发散型零通量面(ZFP);冬灌后,在同样土层深度形成单一的聚合型ZFP。灌溉季节,头水和第2水期间,最终在地表下100 cm处形成稳定的单一发散型ZFP。第3水至第5水期间,灌水后早期有多个ZFP,晚期ZFP消失,土壤水和地下水的运动表现为地下水补给土壤水的全蒸发型运动状态。

According to monitor the changes of groundwater level and soil moisture potential by negative pressure meter in Await good harvest irrigation district, changes law of the Zero Flux Plane and movement process of field water under condition of surface irrigation in arid and inland river irrigation areas was studied. The result is as follews： A stable single radiation ZFP was formed under ground of 100 cm before irrigation season; after winter irrigation, a single polymerization ZFP was formed in the same soil depth. In irrigation season, there is a single radiation ZFP under ground of 100 cm between first and second irrrgation; during third and fifth irrigation, there are several ZFPs in early period after irrigation, it disappeared in late period; the movement of soil water and underground water showed that the soil water and the water supplied by underground completely evaporated.