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首页> 外文期刊>African Journal of Biotechnology >Simulated and measured soil wetting patterns for overlap zone under double points sources of drip irrigation
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Simulated and measured soil wetting patterns for overlap zone under double points sources of drip irrigation

机译：滴灌双点源下重叠区土壤的湿润模拟与实测。

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摘要

Water resource scarcity is a serious problem hampering agricultural development in the arid and semi-arid region. Drip irrigation is one of the most useful methods that is widely used in the arid and semi-arid region. Intersection is a however, common event under drip irrigation and the crops are always planted in the overlap zone, hence a suitable design and operation of the system is very important for crop yield. In this study, experimental and simulated soil wetting pattern of overlap were investigated for drip irrigation at different emitter discharge, irrigation volume and emitter spacing, respectively. Simulations of the water content and wetting front were close to the observed data. To evaluate the effects of various parameters on wetting, additional simulations were carried out with HYDRUS. After the simulation under the HYDRUS environment, we therefore recommended a larger irrigation volume, larger wetting pattern; and when the emitter spacing is shorter, then the wetting patterns should be larger. Due to the heterogeneity of soil texture, the horizontal and vertical distance are almost uniformly in the loam and silt, inversely in loamy sand.
机译：水资源稀缺是阻碍干旱和半干旱地区农业发展的严重问题。滴灌是在干旱和半干旱地区广泛使用的最有用的方法之一。然而，相交是滴灌下的常见事件，农作物总是种植在重叠区域，因此，该系统的合适设计和操作对于农作物产量非常重要。在这项研究中，分别研究了在不同的发射器流量，灌溉量和发射器间距下滴灌的重叠实验和模拟土壤湿润模式。含水量和润湿前沿的模拟接近于观察到的数据。为了评估各种参数对润湿的影响，使用HYDRUS进行了附加模拟。因此，在HYDRUS环境下进行模拟后，我们建议使用更大的灌溉量和更大的润湿方式;当发射极间距较短时，则润湿模式应较大。由于土壤质地的异质性，在壤土和淤泥中的水平和垂直距离几乎一致，而在壤土沙中则相反。

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