SI2-SSI: Collaborative Research: STORM: A Scalable Toolkit for an Open Community Supporting Near Realtime High Resolution Coastal Modeling

ADCIRC沿海环流和风暴潮模式有着极高的社会影响的长期记录。它已被用于为从纽约到德克萨斯州的沿海各州的联邦应急管理局国家洪水保险计划定义风险(例如，100年、500年沿海洪水水位)，它被美国陆军工程兵团用来设计大新奥尔良和路易斯安那州南部数十亿美元的飓风和风暴损害风险降低系统，它目前由NOAA/NWS国家环境预测中心运行，以预测风暴潮，这里只列出它目前和最近的几个应用。因此，有一个完善的用户网络，可以将ADCIRC的改进转化为重大的更广泛的影响。拟议的研究提供了变革性的智力贡献，重点是应用新的并行化方案，以使ADCIRC模型的算法、实施和利用取得重大进展。ADCIRC向多算法框架的扩展以及由此带来的绩效提升预期将有助于确保ADCIRC作为核心社区模式的可持续性至少在未来20年内。此外，拟议的协作将影响计算机科学，因为它将作为一个高影响力的用例，为高效可扩展计算的新方法的设计提供信息。总之，海岸模拟和并行化技术的进步将对模拟科学和高性能计算做出重大贡献。拟议研究的结果将通过参与组织正在进行的教育外联活动以及通过参考的会议和期刊论文以及特邀发言向更广泛的社区传播。研究生和博士后研究员的参与将对该项目的成功至关重要。私人投资机构在培训和指导学生和博士后方面有很长的历史，涉及计算科学和工程、沿海工程和海洋科学。招募和参与这些努力中任职人数不足的群体一直是一个高度优先事项。此外，拟议研究的各个方面将被纳入由私人投资机构教授的几门课程的课程中，涉及有限元方法、科学计算、水文学和海洋学领域。该项目的目的是将ADCIRC海岸环流和风暴潮模型从一个成功的、但有点静态的海岸建模工具扩展到一个由多个求解算法组成的动态计算平台，该平台可以很容易地接受新的求解算法，并且建立在一个变革性的新的并行方案之上，该方案将使我们能够在现代高性能计算(HPC)系统上扩展到至少256k的计算核心。我们将通过创建一个活生生的、不断发展的海岸建模框架来实现这一点，该框架将继续引领社区融合物理科学/工程和高性能计算，我们将向更广泛的社区提供该框架，作为其沿海建模需求的可持续长期解决方案。此外，我们将在目前运行的要求很高的沿海风暴潮预报系统中利用这些进步来证明模型解决方案的健壮性和速度都得到了改善。我们预计，这一努力将缩短提供可靠预测结果所需的时间，并提高我们以前所未有的规模提供高度分辨率、准确和物理上完整的预测的能力。同时，它应该能够使用较小的资源进行更大规模的模拟，从而提高ADCIRC的可用性并扩大其在更广泛社区中的适用性。开发紧密结合的面向网络的产品，如CERA(www.coastalEmergency.org)，将使预测建模结果能够广泛和及时地传播到广大受众手中。

The ADCIRC coastal circulation and storm surge model has a long standing track record of extremely high societal impact. It has been used to define risk (e.g., 100-yr, 500-yr coastal flood levels) for the FEMA National Flood Insurance Program in coastal states from New York to Texas, it has been used to design the multi-billion dollar Hurricane and Storm Damage Risk Reduction System around greater New Orleans and southern Louisiana by the Army Corps of Engineers, it is currently run operationally by NOAA/NWS National Center for Environmental Prediction to forecast storm surge, to name just a few of its current and recent applications. Thus there is a well-established user network in place to convert improvements in ADCIRC into significant broader impacts. The proposed research provides transformative intellectual contributions that focus on applying new parallelization schemes to enable major advances in the algorithms, implementation and utilization of the ADCIRC model. The broadening of ADCIRC to a multi-algorithmic framework and the resulting performance gains that are anticipated will help ensure ADCIRC's sustainability as a core community model for at least the next 20 years. In addition, the proposed collaboration will impact computer science by serving as a high impact use case to inform the design of new approaches to efficient scalable computing. Together, the advancements in coastal modeling and parallelization technology will make a significant contribution to the science of modeling and HPC. The results of the proposed research will be disseminated to a wider community through ongoing educational outreach activities at the participating organizations as well as through refereed conference and journal papers, and invited presentations. The involvement of graduate students and post-doctoral fellows will be crucial towards the success of this project. The PIs have a long history of training and mentoring students and post-docs in computational science and engineering, coastal engineering and marine science. The recruitment and involvement of underrepresented groups in these efforts has always been a high priority. In addition, aspects of the proposed research will be incorporated into the curricula of several courses taught by the PIs in the areas of finite element methods, scientific computation, hydrology and oceanography.The aim of this project is to broaden the ADCIRC coastal circulation and storm surge model from a successful, but somewhat static coastal modeling tool that is tied to a single solution algorithm and the MPI parallelization paradigm, to a dynamic computational platform that is comprised of multiple solution algorithms, that readily admits new solution algorithms and that is built on a transformational new parallelization scheme that will allow us to scale to at least 256k compute cores on modern high performance computing (HPC) systems. We will do this by creating a living, evolving coastal modeling framework that will continue to lead the community in merging physical science / engineering and high performance computing and we will make the framework available to the broader community as a sustainable long term solution for its coastal modeling needs. In addition we will utilize these advancements in the highly demanding coastal storm surge forecasting system that we presently operate to demonstrate both improved robustness and speed of the model solution. We expect this effort will shorten the time required to provide reliable forecasting results and improve our ability to provide highly resolved, accurate, and physically complete predictions on an unprecedented scale. Concurrently, it should enable the use of smaller resources for simulations of increased scale which improves the usability and widens the applicability of ADCIRC in a broader community. The development of tightly integrated web-oriented products like CERA (www.coastalemergency.org) will enable the wide and timely dissemination of forecast modeling results to reach a broad audience.