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首页> 外文期刊>Hydrology and Earth System Sciences >Integrated water system simulation by considering hydrological and biogeochemical processes: model development, with parameter sensitivity and autocalibration
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Integrated water system simulation by considering hydrological and biogeochemical processes: model development, with parameter sensitivity and autocalibration

机译：考虑水文和生物地球化学过程的集成水系统模拟：模型开发，具有参数敏感性和自动校准

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Integrated water system modeling is a feasible approach to understandingsevere water crises in the world and promoting the implementation ofintegrated river basin management. In this study, a classic hydrologicalmodel (the time variant gain model: TVGM) was extended to an integrated watersystem model by coupling multiple water-related processes in hydrology,biogeochemistry, water quality, and ecology, and considering the interferenceof human activities. A parameter analysis tool, which included sensitivityanalysis, autocalibration and model performance evaluation, was developed toimprove modeling efficiency. To demonstrate the model performances, theShaying River catchment, which is the largest highly regulated and heavilypolluted tributary of the Huai River basin in China, was selected as the casestudy area. The model performances were evaluated on the key water-relatedcomponents including runoff, water quality, diffuse pollution load (ornonpoint sources) and crop yield. Results showed that our proposed modelsimulated most components reasonably well. The simulated daily runoff at mostregulated and less-regulated stations matched well with the observations. Theaverage correlation coefficient and Nash–Sutcliffe efficiency were 0.85 and0.70, respectively. Both the simulated low and high flows at most stationswere improved when the dam regulation was considered. The dailyammonium–nitrogen (NH4–N) concentration was also well captured withthe average correlation coefficient of 0.67. Furthermore, the diffuse sourceload of NH4–N and the corn yield were reasonably simulated at theadministrative region scale. This integrated water system model is expectedto improve the simulation performances with extension to more modelfunctionalities, and to provide a scientific basis for the implementation inintegrated river basin managements.
机译：综合水系统建模是一种了解世界上严重水危机并促进流域综合管理实施的可行方法。在这项研究中，经典水文模型（时变增益模型：TVGM）通过将水文，生物地球化学，水质和生态学中与水有关的多个过程耦合在一起，并考虑到人类活动的干扰而扩展到了综合水系统模型。开发了一种参数分析工具，其中包括灵敏度分析，自动校准和模型性能评估，以提高建模效率。为了演示模型的性能，选择了沙ying河流域作为案例研究区域，该流域是中国淮河流域最大的高度管制和严重污染的支流。对模型的性能进行了评估，评估了与水有关的关键要素，包括径流，水质，弥散性污染负荷（或非点源）和农作物产量。结果表明，我们提出的模型可以很好地模拟大多数组件。在受最管制和受管制较少的站的模拟日径流量与观测值吻合得很好。平均相关系数和Nash-Sutcliffe效率分别为0.85和0.70。考虑大坝调节后，大多数站的模拟低流量和高流量都得到了改善。铵态氮（NH 4 -N）的日浓度也被很好地捕获，平均相关系数为0.67。此外，在行政区域范围内合理地模拟了NH 4 –N的扩散源负荷和玉米产量。该集成水系统模型有望改善仿真性能，并扩展到更多的模型功能，并为实现流域集成管理提供科学依据。

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