黑土区地下暗灌湿润锋运移规律研究

Research of subsurface irrigation wetting front migration regular in black soil area

通过地下暗灌的室内试验研究湿润锋运移特性。试验采用黑龙江省的黑土,灌水器流量分别为1.10L/h和1.38L/h,埋深为30cm。结果表明,滴头流量1.38L/h处理的湿润锋扩散范围大于1.10L/h处理的范围,在灌水初期湿润锋呈圆形,随着灌水时间的延长,湿润锋呈椭圆形,且湿润锋扩展速度逐渐减小。

Through subsurface irrigation laboratory experiments, soil wetting front were analyzed. The experiment take the Heilongjiang black soil, and the experimental dripper discharges were 1.10 and 1.38 L/h, and the dripper was 30 cm deeply buried. The results indicatesd that wetting front diffusion range of dripper discharges 1.38 L/h processing is bigger than the range of 1.10 L/h, and at the beginning of the irrigation wetting front is round, as the extension of irrigation time wetting front is oval, with the extension of irrigation time, subsurface irrigation wetting front extension velocity decreases.