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首页> 外文期刊>Hydrological Processes >Estimation Of Seasonal Crop Water Consumption In A Vineyard Using Bowen Ratio-energy Balance Method
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Estimation Of Seasonal Crop Water Consumption In A Vineyard Using Bowen Ratio-energy Balance Method

机译：鲍恩比-能量平衡法估算葡萄园季节性作物耗水量

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摘要

Information about seasonal crop water consumption is useful to develop the appropriate irrigation scheme. Measurements of energy balance components using the Bowen ratio method were made for a complete growing season at a vineyard in the arid region of northwest China. Vine in the experiment was furrow-irrigated using a trellis system. The measured evapotranspiration was compared with estimates using the soil water balance method. It is shown that the Bowen ratio method provided accurate estimates of evapotranspiration from the vineyard and this requires that the Bowen ratio system is appropriately installed. The energy balance components showed typical diurnal pattern with peaks that occurred around the midday, except for the ground heat flux which delayed its peak by 2-3 h. The sensible heat flux was greater than the latent heat flux and followed the net radiation closely. The ratio of the latent heat flux to net radiation was low in the early growing season and increased over time. Under the limited irrigation experienced in the vineyard, the latent heat flux was controlled by available soil moisture and the total evapotranspiration in the growing season was 253 mm. The seasonal progression of the crop coefficient is similar to that reported in the literature, with the maximum occurring during the month of September. The crop coefficient can be estimated as a non-linear function of day of year (DOY) and used to estimate evapotranspiration from vineyards in the region.
机译：有关季节性作物耗水量的信息对于制定适当的灌溉计划很有用。在中国西北干旱地区的一个葡萄园中，使用鲍文比率法对整个生长季节的能量平衡成分进行了测量。实验中的葡萄藤采用网格系统进行沟灌。使用土壤水平衡法将测得的蒸散量与估算值进行比较。结果表明，Bowen比率法可以准确估算出葡萄园的蒸散量，这需要适当安装Bowen比率系统。能量平衡分量显示出典型的昼夜模式，其峰值出现在中午左右，但地面热通量将其峰值延迟了2-3小时。显热通量大于潜热通量，并且紧随净辐射。在生长初期，潜热通量与净辐射的比率较低，并且随时间增加。在葡萄园有限的灌溉条件下，潜热通量受土壤有效水分控制，生长期总蒸散量为253 mm。作物系数的季节变化与文献报道相似，最大值出现在9月。可以将农作物系数估算为年度（DOY）的非线性函数，并用于估算该地区葡萄园的蒸散量。

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