Drought is a phenomenon that caused by several factors and can be divided into meteorological drought, agricultural hydrological socioeconomic drought. In this study, the characteristics of propagating from drought to (or hydrological) in Andong Dam basin Hapcheon located Nakdong River Korea were investigated. Standardized precipitation index (SPI), standardized soil moisture (SMI), runoff (SRI...

water crisis and drought are among the most important issues to which the human has been faced particularly in the recent years; hence, investigation of drought is so important in optimal water management. drought has been known as an environmental phenomenon which is inseparable from climate changes which can occur in any geographical region. various definitions have been presented since yet. ...

Drought is the most dangerous natural disaster. It differs from other disasters in that it occurs insidiously, its effects are revealed gradually, and persists for a long period. has huge, negative on both society ecosystems. In this study, values Standardized Precipitation Index (SPI) were used to generate drought estimation models by using Artificial Neural Networks (ANN). addition, probabili...

From joint sea surface temperature/sea level pressure (SST/SLP) EOF analyses, lowfrequency variability modes are compared. The multi-decadal oscillation (MDO) changed phases twice during the 20th century, with its north Atlantic SST patterns resembling the Atlantic multi-decadal oscillation (AMO). The quasi-decadal oscillation (QDO) SST patterns displayed a double tripole configuration over the...

Drought is one of the most important weather-induced phenomena which may have severe impacts on different areas such as agriculture, economy, energy production, and society. A number of drought indices have been introduced and used in various countries to date. In the current study, four meteorological drought indices including Percent of Normal Precipitation Index (PNPI), Standard Index of Ann...

     Drought monitoring is a fundamental component of drought risk management. It is normally performed using various drought indices that are effectively continuous functions of rainfall and other hydrometeorological variables. In many instances, drought indices are used for monitoring purposes. Geostatistical methods allow the interpolation of spatially referenced data and the prediction of v...

In recent years, global climate change has altered precipitation patterns, causing uneven spatial and temporal distribution of precipitation that gradually induces precipitation polarization phenomena. Taiwan is located in the subtropical climate zone, with distinct wet and dry seasons, which makes the polarization phenomenon more obvious; this has also led to a large difference between river f...