A Joint Soil‐Vegetation‐Atmospheric Water Tagging Procedure With WRF‐Hydro: Implementation and Application to the Case of Precipitation Partitioning in the Upper Danube River Basin
A Joint Soil‐Vegetation‐Atmospheric Water Tagging Procedure With WRF‐Hydro: Implementation and Application to the Case of Precipitation Partitioning in the Upper Danube River Basin
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DOI：
10.1029/2019wr024780
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发表时间：
2019-07
影响因子：
5.4
通讯作者：
J. Arnault;Jianhui Wei;Thomas Rummler;B. Fersch;Zhenyu Zhang;G. Jung;S. Wagner;H. Kunstmann
中科院分区：
文献类型：
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作者：
J. Arnault;Jianhui Wei;Thomas Rummler;B. Fersch;Zhenyu Zhang;G. Jung;S. Wagner;H. Kunstmann
大气模式，如天气研究与预报（WRF）模式，提供了一个工具来评估区域水循环成分的行为，包括降水、蒸散发、土壤水分储存和径流。最近的模式发展主要集中在耦合大气-水文建模系统，如WRF - Hydro，以考虑地下、陆地和河流流量，并有可能改善陆地-大气相互作用的表现。本研究的目的是借助WRF - tag和WRF - Hydro - tag模型中新开发的土壤-植被-大气水联合标记程序，研究横向陆地水流对区域水循环的贡献。本文介绍了两种模式在德国和奥地利多瑙河上游流域（94,100 km2） 2008年8月15日强降水事件的应用。在此事件期间，盆地内的降水被视为水源，并被标记，随后进行了40个月的跟踪，直到2011年12月。在研究期结束时，在两个模拟中，大约57%的标记水已经流失，而41%已经蒸发回大气，其中2%已经在多瑙河上游流域作为降水循环。在WRF - Hydro - tag中，在地形坡度较低的地区，地表水流渗透会略微增强标记水的表面蒸发，而地下侧向水流则会略微降低标记水的表面蒸发。这对源降水的再循环影响很小。
Atmospheric models such as the Weather Research and Forecasting (WRF) model provide a tool to evaluate the behavior of regional hydrological cycle components, including precipitation, evapotranspiration, soil water storage, and runoff. Recent model developments have focused on coupled atmospheric‐hydrological modeling systems, such as WRF‐Hydro, in order to account for subsurface, overland, and river flow and potentially improve the representation of land‐atmosphere interactions. The aim of this study is to investigate the contribution of lateral terrestrial water flow to the regional hydrological cycle, with the help of a joint soil‐vegetation‐atmospheric water tagging procedure newly developed in the so‐called WRF‐tag and WRF‐Hydro‐tag models. An application of both models for the high precipitation event on 15 August 2008 in the German and Austrian parts of the upper Danube river basin (94,100 km2) is presented. The precipitation that fell in the basin during this event is considered as a water source, is tagged, and subsequently tracked for a 40‐month period until December 2011. At the end of the study period, in both simulations, approximately 57% of the tagged water has run off, while 41% has evaporated back to the atmosphere, including 2% that has recycled in the upper Danube river basin as precipitation. In WRF‐Hydro‐tag, the surface evaporation of tagged water is slightly enhanced by surface flow infiltration and slightly reduced by subsurface lateral water flow in areas with low topography gradients. This affects the source precipitation recycling only in a negligible amount.