Runoff prediction in ungauged catchments in Norway: comparison of regionalization approaches
Runoff prediction in ungauged catchments in Norway: comparison of regionalization approaches
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DOI：
10.2166/nh.2017.071
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发表时间：
2018-04
影响因子：
2.7
通讯作者：
Xue Yang;J. Magnusson;J. Rizzi;Chong-yu Xu
中科院分区：
文献类型：
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作者：
Xue Yang;J. Magnusson;J. Rizzi;Chong-yu Xu
近几十年来，未计量流域的径流预测一直是一个具有挑战性的话题。已经进行了许多研究，包括国际水文科学协会 PUB（未测量流域预测）十年的深入研究。水文模型区划研究取得重大进展；然而，各种方法在不同地区、不同模型的适用性，目前还没有明确的结论。这项研究对现有区域化方法在预测挪威高纬度、气候和地理多样性、季节性积雪的山区流域的未测量河流流量方面的优势和局限性进行了全面评估。利用水平衡模型WASMOD（Water And Snow Balance MODEling system）对挪威118个独立流域的区划方法进行了评估，结果表明：（1）基于距离的相似性方法（空间接近性、物理相似性）优于基于回归的方法； （2）其中一种组合方法（结合空间邻近性和物理相似性方法）可以稍微进一步改善模拟； (3) 将流域分类为同质组并没有改善我们研究区域未测量流域的模拟。这项研究有助于区域化方法的理论理解和发展。
Runoff prediction in ungauged catchments has been a challenging topic during recent decades. Many researches have been conducted including the intensive studies of the PUB (Prediction in Ungauged Basins) Decade of the International Association for Hydrological Science. Great progress has been achieved in the field of regionalization study of hydrological models; however, there is no clear conclusion yet about the applicability of various methods in different regions and for different models. This study made a comprehensive assessment of the strengthens and limitations of existing regionalization methods in predicting ungauged stream flows in the high latitude, large climate and geographic diversity, seasonally snow-covered mountainous catchments of Norway. The regionalization methods were evaluated using the water balance model – WASMOD (Water And Snow balance MODeling system) on 118 independent catchments in Norway, and the results show that: (1) distance-based similarity approaches (spatial proximity, physical similarity) performed better than regression-based approaches; (2) one of the combination approaches (combining spatial proximity and physical similarity methods) could slightly further improve the simulation; and (3) classifying the catchments into homogeneous groups did not improve the simulations in ungauged catchments in our study region. This study contributes to the theoretical understanding and development of regionalization methods.