Reza Modarres

TL;DR: In this paper, a generalized autoregressive conditional heteroscedasticity (GARCH) model was applied to two monthly rainfall time series from humid and arid regions, and the effect of Box-Cox transformation and seasonal differencing on the residuals of the SARIMA model was also investigated.

TL;DR: In this paper, the authors analyzed time series of annual rainfall, number of rainy-days per year and monthly rainfall of 20 stations to assess climate variability in arid and semi-arid regions of Iran.

TL;DR: In this article, a probabilistic approach is developed to establish a drought severity-duration-frequency (SDF) relationship, where copulas are employed to construct the joint distribution function of drought severity and duration, in terms of recurrence interval of drought events, is then related to the copula-based distribution function via a conditional distribution function.

TL;DR: In this paper, a multiplicative seasonal autoregressive integrated moving average (SARIMA) model is applied to the monthly streamflow forecasting of the Zayandehrud River in western Isfahan province, Iran.

TL;DR: In this article, the authors performed the spatial and temporal trend analysis of the annual and 24-hr maximum rainfall of a set of 145 precipitation gauging stations of Iran and found that the negative trends of annual rainfall are mostly observed in northern and northwestern regions, whereas positive trends of 24-hour maximum rainfall were mostly located in arid and semi-arid regions of Iran.