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arXiv 2006.02581physics.ao-phstat.ML
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利用人工神经网络和水文气象变量预测短期和长期干旱

Prediction of short and long-term droughts using artificial neural networks and hydro-meteorological variables

Yousef Hassanzadeh, Mohammadvaghef Ghazvinian, Amin Abdi, Saman Baharvand, Ali Jozaghi

摘要:

干旱是一种自然的缓慢威胁,对人类生活的各个方面造成许多破坏性影响。准确的干旱预测是帮助决策者制定干旱风险管理战略的一个有希望的步骤。为了达到这一目的,选择合适的模型在预测方法中起着重要的作用。在这项研究中,不同的人工神经网络(ANN)模型,预测短期和长期的干旱在不同的时间尺度,包括3,6,12,24和48个月在伊朗大不里士市,使用标准化降水指数(SPI)。为此,不同的组合计算的SPI和时间序列的各种水文气象变量,如降水,风速,相对湿度和日照时数,1992年至2010年训练的人工神经网络模型。为了比较模型的性能,一些著名的措施,即均方根误差,平均绝对误差(MAE)和相关系数(CC)在本研究中使用。结果表明,所有水文气象变量的应用显着提高了不同时间尺度上的SPI的预测。

英文摘要:

Drought is a natural creeping threat with numerous damaging effects in various aspects of human life. Accurate drought prediction is a promising step in helping policy makers to set drought risk management strategies. To fulfill this purpose, choosing appropriate models plays an important role in predicting approach. In this study, different models of Artificial Neural Network (ANN) are employed to predict short and long-term of droughts by using Standardized Precipitation Index (SPI) at different time scales, including 3, 6, 12, 24 and 48 months in Tabriz city, Iran. To this end, different combination of calculated SPI and time series of various hydro-meteorological variables, such as precipitation, wind velocity, relative humidity and sunshine hours for years 1992 to 2010 are used to train the ANN models. In order to compare the models performances, some well-known measures, namely RMSE, Mean Absolute Error (MAE) and Correlation Coefficient (CC) are utilized in the present study. The results illustrate that the application of all hydro-meteorological variables significantly improves the prediction of SPI at different time scales.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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