...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Hydrology >Evaluation of three complementary relationship evapotranspiration models by water balance approach to estimate actual regional evapotranspiration in different climatic regions
【24h】

Evaluation of three complementary relationship evapotranspiration models by water balance approach to estimate actual regional evapotranspiration in different climatic regions

机译：通过水平衡法评估三种互补关系蒸散模型，以估算不同气候区域的实际区域蒸散量

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Three evapotranspiration models using the complementary relationship approach for estimating areal actual evapotranspiration were evaluated and compared in three study regions representing a large geographic and climatic diversity: NOPEX region in Central Sweden (cool temperate, humid), Baixi catchment in Eastern China (subtropical, humid), and the Potamos tou Pyrgou River catchment in Northwestern Cyprus (semiarid to arid). The models are the CRAE model of Morton, the advection-aridity (AA) model of Brutsaert and Stricker, and the GG model proposed by Granger and Gray using the concept of relative evapotranspiration (the ratio of actual to potential evapotranspiration). The calculation was made on a daily basis and comparison was made on monthly and annual bases. The study was performed in two steps: First, the three evapotranspiration models with their original parameter values were applied to the three regions in order to test their general applicability. Second, the parameter values were locally calibrated based on the water balance study. The results showed that (1) using the original parameter values all three complementary relationship models worked reasonably well for the temperate humid region, while the predictive power decreases in moving toward regions of increased soil moisture control, i.e. increased aridity. In such regions, the parameters need to be calibrated. (2) Using the locally calibrated parameter values all three models produced the annual values correctly. For the monthly values there was a time shift for the appearance of maximum monthly values between the evapotranspiration model estimations and water balance calculations, and the drier the region, the larger the difference. Further examination of the water balance components showed that while the actual evapotranspiration is controlled by several hydrometeorological factors in warmer and drier months the soil moisture is the dominating factor. (c) 2004 Elsevier B.V. All rights reserved.
机译：在三个代表较大地理和气候多样性的研究区域中，评估和比较了三种利用互补关系法估算面积实际蒸散量的蒸散模型：瑞典中部的NOPEX地区（凉爽温带，潮湿），华东的白溪流域（亚热带，湿润） ），以及塞浦路斯西北部（半干旱至干旱）的Potamos tou Pyrgou河流域。这些模型是Morton的CRAE模型，Brutsaert和Stricker的对流干旱（AA）模型以及Granger和Gray使用相对蒸发量（实际蒸发量与潜在蒸发量之比）提出的GG模型。每天进行计算，并以月度和年度为基础进行比较。该研究分两个步骤进行：首先，将三个蒸散模型及其原始参数值应用于这三个区域，以测试其总体适用性。其次，根据水平衡研究对参数值进行局部校准。结果表明（1）使用原始参数值，所有三个互补关系模型在温带湿润地区均能很好地工作，而预测能力在朝着增加土壤水分控制的区域（即干旱增加）的方向降低。在此类区域中，需要对参数进行校准。 （2）使用本地校准的参数值，所有三个模型均正确生成了年度值。对于月度值，在蒸散模型估计和水平衡计算之间出现最大月度值存在时间偏移，并且区域越干燥，差异越大。对水平衡成分的进一步检查表明，在较热和较干燥的月份中，尽管实际的蒸散量受几种水文气象因素控制，但土壤水分是主要因素。 （c）2004 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号