Catchment precipitation processes in the San Francisco valley in southern Ecuador: combined approach using high-resolution radar images and in situ observations
Catchment precipitation processes in the San Francisco valley in southern Ecuador: combined approach using high-resolution radar images and in situ observations
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厄瓜多尔南部旧金山山谷的流域降水过程：使用高分辨率雷达图像和现场观测的组合方法
DOI：
10.1007/s00703-014-0335-3
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发表时间：
2014
影响因子：
2
通讯作者：
Bendix J
中科院分区：
文献类型：
--
作者：
Fries A;Rollenbeck R;Bayer F;Ganzalez V;Oñate-Valdivieso F;Peters T;Bendix J
由于热带山区降水分布的不均匀性和气象站资料的缺乏，生态学和水文学研究迫切需要精确估算热带山区的降水量。这项研究利用雷达图像和地面站数据提供所需的高分辨率降水图。同时考虑了风场资料对降水形成的影响，并论证了天气风场、地形与小山谷内降水分布的关系。分析了厄瓜多尔南部热带安第斯山脉小流域弗朗西斯科山谷内4天的降雨分布和降雨量，代表了不同的季节和典型的大气流动，并与年降水图相关联。结果表明，除地形位置与主要障碍物和通道的关系外，风向和风速通常决定了降雨分布和降雨量。主导风向导致东部多雨和西部干燥的集水区分裂。此外，每年的季节是颠倒的;东部的主要雨季是在6月至8月，而西部的降水量最大期是在1月至3月。这可能会对不同坡度的物种组成和集水区内的年水文循环产生影响。
The precise estimation of precipitation quantities in tropical mountain regions is in great demand by ecological and hydrological studies, due to the heterogeneity of the rainfall distribution and the lack of meteorological station data. This study uses radar images and ground station data to provide the required high-resolution precipitation maps. Also wind data are taken into account, due to its influence on the precipitation formation and to demonstrate the relation between synoptic wind, topography and the precipitation distribution inside small mountain valleys. The study analyses the rainfall distribution and amounts of 4 days inside the San Francisco Valley, a small catchment in the tropical Andes of southern Ecuador, representing different seasons and the typical atmospheric flows, which are correlated to the annual precipitation map. The results show that the rainfall distribution and amounts are generally defined by the wind direction and velocity, besides the topographic location in relation to the main barriers and pathways. The dominant wind direction causes a division of the catchment in a wetter eastern and a dryer western part. Moreover, the annual seasons are reversed; the main rainy season for the eastern part occurs between June and August, while the western part reaches the precipitation maximum between January and March. This may have influence on the species composition at the different slopes and the annual hydrological cycle inside the catchment.
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影响因子：
3
作者：
G. Delrieu;B. Boudevillain;J. Nicol;B. Chapon;P. Kirstetter;H. Andrieu;D. Faure
通讯作者：
G. Delrieu;B. Boudevillain;J. Nicol;B. Chapon;P. Kirstetter;H. Andrieu;D. Faure
影响因子：
8.9
作者：
R. Rotunno;R. Houze
通讯作者：
R. Rotunno;R. Houze
影响因子：
6.4
作者：
Ronald B. Smith
通讯作者：
Ronald B. Smith
DOI：
10.1007/978-3-642-38137-9
发表时间：
2013
期刊：
--
影响因子：
--
作者：
J. Bendix;E. Beck;A. Bräuning;F. Makeschin;R. Mosandl;S. Scheu;W. Wilcke
通讯作者：
J. Bendix;E. Beck;A. Bräuning;F. Makeschin;R. Mosandl;S. Scheu;W. Wilcke
气象雷达揭示的阿尔卑斯山南侧气流与地形降水的关系
影响因子：
8.9
作者：
L. Panziera;U. Germann
通讯作者：
U. Germann