world. According to the results, Urmia Lake basin faced the most severe drought condition in the past half century in 1998 … and RDI performance in drought recognition was acceptable and matched in many cases; nevertheless, it was concluded that … RDI is more sensitive to severe drought. While SPI had no long term trend, RDI showed negative trend and an abrupt change …

This study aims to model the joint drought duration and severity distribution using two-dimensional copulas. The method … as a function of the dependence parameters. The drought duration and severity are assumed to be exponential and gamma …. The copula fitting results for drought duration and severity are quite satisfactory. The bivariate drought analyses …

spell length (AMDSL), is a key practice for regional drought analysis and mitigation management. For arid and semi arid … with L-moment method for hydrologic regionalization and spatial variation of drought statistical characteristics. Copyright …

significant influence on the assessment of paddy water requirements during non-drought seasons while hardly effects the paddy … water demand estimated for drought seasons. Furthermore, the daily-time-series analysis of the paddy water demand assessment … precipitation data are more reasonably adopted to estimate paddy water requirements in non-drought seasons than the monthly …

streamflow prediction, conflicts over water resources allocation, and the absence of necessary emergency schemes in drought … situations. Reservoirs could play an important role in drought mitigation; therefore, development of an algorithm for operation … of reservoirs in drought periods could help to mitigate the drought impacts by reducing the expected water shortages. For …

Drought is a natural hazard with varying patterns in space, time, and intensity. Because of the spatial and temporal … variability and multiple impacts of drought, it is necessary to improve tools and data available for mapping and monitoring this … phenomenon on all scales. Starting from some initiatives promoted by the European Community, an integrated drought watch system …

Unlike other natural disasters, drought events evolve slowly in time and their impacts generally span a long period of … time. Such features do make possible a more effective drought mitigation of the most adverse effects, provided a timely … monitoring of an incoming drought is available. Among the several proposed drought monitoring indices, the Standardized …

In the present paper the authors analyse the drought occurrence over the European region by using the NCEP …/NCAR reanalysis precipitation rates covering the period from 1948 to 2000. The drought assessment is based on the Standardized … Precipitation Index (SPI), which has been proposed as an indicator of drought condition. At variance with other fields derived from …

significantly wet trend, whilst the eastern basin including the Guanzhong Plain has a trend towards drought . Since the historical … droughts records were too short to fully investigate drought properties in this basin, a practical nonparametric method was … proposed to calculate the joint probability distribution of drought properties, which overcomes the shortcomings of the …