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首页> 外文期刊>Ecological informatics: an international journal on ecoinformatics and computational ecology >MATLAB Hydrological Index Tool (MHIT): A high performance library to calculate 171 ecologically relevant hydrological indices
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MATLAB Hydrological Index Tool (MHIT): A high performance library to calculate 171 ecologically relevant hydrological indices

机译：MATLAB水文指数工具（MHIT）：一个高性能库，可计算171个与生态相关的水文指数

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摘要

Ecologically relevant hydrologic indices are being used for developing environmental flow baselines. EflowStats is an R-package developed by the US Geological Survey that calculates 171 ecologically relevant hydrologic indices. Although EflowStats provides a set of easy to use functions, once it is applied to a large area with thousands of streams, it requires a long processing time. This particularly limits its application in problems that are dealing with optimizations, requiring evaluation of thousands of scenarios. As a result, a new package called MATLAB Hydrological Index Tool (MHIT) was developed, incorporating different technologies, such as vectorization, memoization, and parallelism to considerably reduce the processing time. Both EflowStats and MHIT were tested against a long-term (20 years) daily streamflow data set from the Saginaw River Watershed in Michigan. In summary, MHIT reduces the processing time by 227 times for the study area. Therefore, MHIT is much more suitable for dealing with Big Data. (C) 2016 Elsevier B.V. All rights reserved.
机译：与生态有关的水文指数正在用于制定环境流量基准。 EflowStats是由美国地质调查局开发的R包，可计算171个与生态相关的水文指数。尽管EflowStats提供了一组易于使用的功能，但是一旦将EflowStats应用于具有数千个流的大区域，则需要较长的处理时间。这特别限制了它在涉及优化的问题中的应用，这些问题需要评估成千上万的方案。结果，开发了一个名为MATLAB水文索引工具（MHIT）的新程序包，其中结合了矢量化，备忘录和并行性等不同技术，从而大大减少了处理时间。 EflowStats和MHIT均根据来自密歇根州萨吉诺河流域的长期（20年）每日流量数据进行了测试。总之，MHIT将研究区域的处理时间减少了227倍。因此，MHIT更适合处理大数据。 （C）2016 Elsevier B.V.保留所有权利。

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