| 区域蒸散发分析及模型研究——以河套灌区义长灌域永联试验区为例 |
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| 引用本文： | 武夏宁,胡铁松,王修贵,江燕,李峰. 区域蒸散发分析及模型研究——以河套灌区义长灌域永联试验区为例[J]. 武汉大学学报(工学版), 2006, 39(4): 37-41 |
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| 作者姓名： | 武夏宁 胡铁松 王修贵 江燕 李峰 |
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| 作者单位： | 武汉大学水资源与水电工程科学国家重点实验室,湖北,武汉,430072 |
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| 摘 要： | 以河套灌区义长灌域永联试验区为例,对水均衡法中采用不同时间和空间尺度时的蒸散发估算结果进行了比较分析.然后借鉴由参考作物腾发量(ET0)计算实际蒸散发量的思路,以区域平均埋深和累积生长度日(GDD)为变量,建立综合因子,再结合参考作物腾发量估算出区域蒸散发.利用永联试验区的数据对模型进行检验,结果可靠.该模型需要数据较少,易应用,为实时估算农田区域蒸散发量提供了一种方法.
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| 关 键 词： | 区域蒸散发 水量平衡 参考作物腾发量 累积生长度日 |
| 文章编号： | 1671-8844（2006）04-037-05 |
| 收稿时间： | 2006-01-06 |
| 修稿时间： | 2006-01-06 |
Analysis and study of regional evapotranspiration——Taking Yonglian test area in Hetao Irrigation District for exmaple |
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| WU Xianing,HU Tiesong,WANG Xiugui,JIANG Yan,LI Feng. Analysis and study of regional evapotranspiration——Taking Yonglian test area in Hetao Irrigation District for exmaple[J]. Engineering Journal of Wuhan University, 2006, 39(4): 37-41 |
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| Authors: | WU Xianing HU Tiesong WANG Xiugui JIANG Yan LI Feng |
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| Affiliation: | State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China |
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| Abstract: | Taking the Yonglian test area in Hetao Irrigation District for example,the space-time scale of regional evapotranspiration estimated by water balance method is analyzed.A model for estimating regional evapotranspiration is established basing on the idea that actual evapotranspiration is estimated by reference evapotranspiration(ET_0).In the model,growing degree days(GDD) and underground water depth are used for the integration factor K_(sc).Regional evapotranspiration is then estimated by multiplying ET_0 and K_(sc).This method is applied to Yonglian test area.The result shows that the model is reasonable and that means it provides a simple and useful approach for estimating regional evapotranspiration. |
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| Keywords: | regional evapotranspiration water balance reference evapotranspiration growing degree days |
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