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首页> 外文期刊>Water News A propos de l'eau >Subwatershed-based lake and river routing products for hydrologie and land surface models applied over Canada
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Subwatershed-based lake and river routing products for hydrologie and land surface models applied over Canada

机译：基于底层的湖泊和河流路由产品，用于加拿大的水中和陆地表面模型

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摘要

Lakes and reservoirs have critical impacts on hydrological, biogeochemical, and ecological processes, and they should be an essential component of regional-scale hydrological and eco-hydrological models. This is particularly important in Canada with its tens of thousands of lakes. Past large-scale hydrologic modelling efforts tend to either ignore the impacts of all lakes or explicitly simulate the behaviour of only the largest lakes in a watershed. This research derives a suite of Pan-Canadian subwatershed-based lake and river routing GIS products at multiple spatial resolutions (average catchment size ranges from 60 to 306 km(2)while the number of lakes explicitly represented ranges from 11,000 to 87,000). These publicly available data products supply all the necessary hydrologic routing model inputs, including network topology, subwatershed geometry, channel characteristics (slope, length, roughness, and geometry), and lake characteristics (area, volume, and outlet description), and were derived primarily from the HydroLAKES, HydroBASINS and HydroSHEDS databases. All Water Survey of Canada streamflow gauging stations are used to define subwatershed outlets in the products. The routing product is used to inform a hydrologic routing model in the Raven hydrologic modelling framework. This is the first demonstration of Raven in routing-only mode. As a case study, the Hudson Bay drainage basin (similar to 40% of Canada) is simulated using GEM-Surf land surface model gridded runoff and recharge as inputs and includes more than 20,000 river reaches and more than 10,000 lakes explicitly represented at an hourly timestep. Uncalibrated streamflows compare reasonably well to measured streamflows at select locations. The sensitivity of the routing model prediction quality to the discretization level for represented lakes is evaluated and shows, for example, that ignoring multiple smaller lakes can have a significant impact on predictions.
机译：湖泊和水库对水文，生物地球化学和生态过程产生严重影响，它们应该是区域规模水文和生态水文模型的重要组成部分。这在加拿大尤为重要，其中成千上万的湖泊。过去的大规模水文建模努力倾向于忽略所有湖泊的影响或明确地模拟流域中最大湖泊的行为。该研究源于多个空间分辨率的泛加拿大河口湖泊和河流路由GIS产品（平均集水区尺寸为60至306公里（2），而明确地代表的湖泊数量为11,000至87,000）。这些公开的数据产品提供了所有必要的水文路由模型输入，包括网络拓扑，副过程几何，通道特性（斜率，长度，粗糙度和几何），以及湖泊特征（面积，音量和出口说明），并衍生出来主要来自水解器，氢萘辛胺和水管数据库。加拿大流流量测量站的所有水调查用于在产品中定义副出口。路由产品用于通知乌鸦水文建模框架中的水文路由模型。这是乌鸦在路由模式中的第一次演示。作为一个案例研究，使用宝石冲浪陆地表面模型网格径流模拟哈德森湾排水盆（类似于加拿大的40％），并包括投入的充值，包括超过20,000个河到达，超过10,000湖在每小时明确地代表。时间戳。 Uncalibriated流出流量比较很好地比较选择位置处的流流。评估路由模型预测质量对代表湖泊的离散化水平的敏感性，并且例如，例如，忽略多个较小湖泊可能对预测产生重大影响。

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  • 来源
    《Water News A propos de l'eau》 |2020年第3期|237-251|共15页
  • 作者

    Han Ming; Mai Juliane; Tolson Bryan A.; Craig James R.; Gaborit Etienne; Liu Hongli; Lee Konhee;

  • 作者单位

    Univ Waterloo Dept Civil & Environm Engn Waterloo ON Canada;

    Univ Waterloo Dept Civil & Environm Engn Waterloo ON Canada;

    Univ Waterloo Dept Civil & Environm Engn Waterloo ON Canada;

    Univ Waterloo Dept Civil & Environm Engn Waterloo ON Canada;

    Environm & Climate Change Canada Dorval PQ Canada;

    Univ Waterloo Dept Civil & Environm Engn Waterloo ON Canada|Natl Ctr Atmospher Res POB 3000 Boulder CO 80307 USA;

    Univ Waterloo Dept Civil & Environm Engn Waterloo ON Canada|Ontario Power Generat Niagara On The Lake ON Canada;

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  • 正文语种 eng
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  • 关键词

    Routing; lakes; pan-Canadian; HydroSHEDS; HydroLAKES;

    机译：路由;湖泊;潘加拿大;水龙头;水果;

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