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首页> 外文期刊>Journal of the American Water Resources Association >Representing the Connectivity of Upland Areas to Floodplains and Streams in SWAT+
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Representing the Connectivity of Upland Areas to Floodplains and Streams in SWAT+

机译：代表普满区域到洪泛区和SWAT +的流的连接

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In recent years, watershed modelers have put increasing emphasis on capturing the interaction of landscape hydrologic processes instead of focusing on streamflow at the watershed outlet alone. Understanding the hydrologic connectivity between landscape elements is important to explain the hydrologic response of a watershed to rainfall events. The Soil and Water Assessment Tool+ (SWAT+) is a new version of SWAT with improved runoff routing capabilities. Subbasins may be divided into landscape units (LSUs), e.g., upland areas and floodplains, and flow can be routed between these LSUs. We ran three scenarios representing different extents of connectivity between uplands, floodplains, and streams. In the first and second scenarios, the ratio of channelized flow from the upland to the stream and sheet flow from the upland to the floodplain was 70/30 and 30/70, respectively, for all upland/floodplain pairs. In the third scenario, the ratio was calculated for each upland/floodplain pair based on the upland/floodplain area ratio. Results indicate differences in streamflow were small, but the relative importance of flow components and upland areas and floodplains as sources of surface runoff changed. Also, the soil moisture in the floodplains was impacted. The third scenario was found to provide more realistic results than the other two. A realistic representation of connectivity in watershed models has important implications for the identification of pollution sources and sinks.
机译：近年来，流域的建模者已经提高了越来越强调捕获景观水文过程的相互作用，而不是仅关注流域出口的流流。了解横向元素之间的水文连接对于解释流域的水文反应是重要的。土壤和水评估工具+（SWAT +）是一种新版本的SWAT，具有改进的径流路由能力。子缩放项可以分为横向单位（LSU），例如，高地区域和泛洪平，并且可以在这些LSU之间路由流程。我们运行了三种情景，代表了高于，洪泛区和流之间的连接的不同范围。在第一和第二场景中，来自普通到洪泛区的来自高地与洪泛区的流的信道流出的比率分别为所有Upland / Floodplain对的70/30和30/70。在第三种情况下，基于Upland / Floodplain面积比对每个Upland / Floodplain对计算的比率。结果表明流流的差异很小，但流量分量和高于地区和洪泛平坦的相对重要性随着表面径流的来源而改变。此外，洪水泛滥的土壤水分受到影响。发现第三种情况提供比另外两个更现实的结果。流域模型连接的现实表现在识别污染源和汇率方面具有重要意义。

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