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首页> 外文期刊>Journal of Hydrology >Stochastic generation of daily rainfall events: A single-site rainfall model with Copula-based joint simulation of rainfall characteristics and classification and simulation of rainfall patterns
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Stochastic generation of daily rainfall events: A single-site rainfall model with Copula-based joint simulation of rainfall characteristics and classification and simulation of rainfall patterns

机译：每日降雨事件的随机发电：一种单点降雨模型，具有基于Copula的降雨特性和降雨模式的分类和仿真

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摘要

Rainfall event simulation can be very useful in many hydrological and hydraulic practices such as darn design. The aim of this study is to propose a new single-site stochastic model for generating daily rainfall events. The model has two components: Copula-based joint simulation of rainfall characteristics and rainfall temporal pattern simulation. Compared with prevailing stochastic rainfall models, this new model can not only preserve the dependence relationship between rainfall duration and rainfall depth by using Copula functions, but also take different temporal rainfall patterns that can cause various hydrological responses of watersheds into consideration. Additionally, the internal clustering validation index is introduced in this study to objectively determine the number of representative rainfall patterns in this model. Lastly, a framework is designed to apply the developed stochastic model to 39 gauged meteorological stations in Zhejiang Province, East China and to extend its application to one ungauged site for validation. The final validation results were sound and indicated that the developed stochastic model is robust and can be applied at both gauged stations and ungauged sites for generating long rainfall records.
机译：降雨事件仿真在许多水力和液压实践中可以非常有用，如DARN设计。本研究的目的是提出一种新的单站点随机模型，用于产生日落事件。该模型有两个组件：基于Copula的降雨特性的联合模拟和降雨时间模式模拟。与现行随机降雨模型相比，这种新模型不仅可以通过使用Copula功能来保护降雨持续时间和降雨量深度之间的依赖关系，而且还采用不同的时间降雨量，可以考虑流域的各种水文反应。另外，在本研究中介绍了内部聚类验证指数，以客观地确定该模型中的代表性降雨模式的数量。最后，框架旨在将开发的随机模型应用于浙江省华东地区的39张测量的气象站，并将其应用扩展到一个未验证的网站进行验证。最终的验证结果是声音，并表明开发的随机模型是稳健的，可在仪表站和未吞吐位点应用，以产生长的降雨记录。

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