A review of drought concepts

Mishra, Ashok Kumar; Singh, Vijay P.

doi:10.1016/j.jhydrol.2010.07.012

Cited by 3,824 publications

(2,566 citation statements)

References 139 publications

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“…They occur in all components of the hydrological cycle and occur across all climate regions throughout the globe (Wilhite, 2000;Tallaksen and Van Lanen, 2004;Mishra and Singh, 2010;Sheffield and Wood, 2011). On a global scale drought is one of the most severe natural hazards with large environmental and socio-economic impacts and more attention is require to be better prepared for the future water, food and energy security (Romm, 2011;Van Vliet et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Future discharge drought across climate regions around the world modelled with a synthetic hydrological modelling approach forced by three general circulation models

Wanders

Lanen

2015

Nat. Hazards Earth Syst. Sci.

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Abstract. Hydrological drought characteristics (drought in groundwater and streamflow) likely will change in the 21st century as a result of climate change. The magnitude and directionality of these changes and their dependency on climatology and catchment characteristics, however, is uncertain. In this study a conceptual hydrological model was forced by downscaled and bias-corrected outcome from three general circulation models for the SRES A2 emission scenario (GCM forced models), and the WATCH Forcing Data set (reference model). The threshold level method was applied to investigate drought occurrence, duration and severity. Results for the control period show that the drought characteristics of each GCM forced model reasonably agree with the reference model for most of the climate types, suggesting that the climate models' results after post-processing produce realistic outcomes for global drought analyses. For the near future (2021-2050) and far future (2071-2100) the GCM forced models show a decrease in drought occurrence for all major climates around the world and increase of both average drought duration and deficit volume of the remaining drought events. The largest decrease in hydrological drought occurrence is expected in cold (D) climates where global warming results in a decreased length of the snow season and an increased precipitation. In the dry (B) climates the smallest decrease in drought occurrence is expected to occur, which probably will lead to even more severe water scarcity. However, in the extreme climate regions (desert and polar), the drought analysis for the control period showed that projections of hydrological drought characteristics are most uncertain. On a global scale the increase in hydrological drought duration and severity in multiple regions will lead to a higher impact of drought events, which should motivate water resource managers to timely anticipate the increased risk of more severe drought in groundwater and streamflow and to design pro-active measures.

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Section: Introductionmentioning

confidence: 99%

Future discharge drought across climate regions around the world modelled with a synthetic hydrological modelling approach forced by three general circulation models

Wanders

Lanen

2015

Nat. Hazards Earth Syst. Sci.

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“…Additionally, the index does not consider snow and the normalization procedure used in the PDSI produces different distributions for different locations. Hence, spatial comparability is not straightforward (Mishra and Singh, 2010). Some of the caveats with the PDSI led to the self-calibrated Palmer Drought Severity Index (Wells et al, 2004), where some of the subjectively determined empirical constants are replaced with values calibrated with the local climatic conditions and ensuring a spatial comparability.…”

Section: R a I B L E E T A Lmentioning

confidence: 99%

“…Indeed, droughts have played an important role in the rise or downfall of civilizations in the past (Haug et al, 2003;Cook et al, 2015), as availability of water is essential for human development. In the light of current and future climate change, the increasing population demands an enhanced intensity in the use of agricultural resources, which then leads to a higher demand in water and makes the socioeconomic system in general more vulnerable to droughts (Mishra and Singh, 2010). Consequently, a better understanding of the processes generating and driving droughts, as well as their predictability, are of high relevance and have attracted a growing attendance in the scientific community (Mariotti et al, 2013;Heim, 2002;Keyantash and Dracup, 2002;Cook et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Drought indices revisited – improving and testing of drought indices in a simulation of the last two millennia for Europe

Raible¹,

Bärenbold²,

Gómez-Navarro

2017

Tellus A: Dynamic Meteorology and Oceanography

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Over the past decades, different drought indices have been suggested in the literature. This study tackles the problem of how to characterize droughts by defining a framework and proposing a generalized family of drought indices that is flexible regarding the use of different hydrological fluxes in the water balance. The sensitivity of various indices and its skill to represent drought conditions is evaluated using a regional model simulation for Europe spanning the last two millennia as test bed. The framework combines an exponentially damped memory with a normalization method based on quantile mapping. Both approaches are more robust and physically meaningful compared to the existing methods used to define drought indices. Still, the framework is flexible with respect to hydrological fluxes used for the water balance, enabling users to adapt the index formulation to the data availability of different locations. Based on it, indices using different hydrological fluxes in the water balance are compared with each other showing that a drought index considering only precipitation in the water balance is sufficient for western to central Europe. In the Mediterranean, temperature effects via evapotranspiration rather than potential evapotranspiration, need to be considered to produce meaningful indices representative of water deficit. In addition, our results indicate that in north-eastern Europe and Scandinavia, snow and run-off effects need to be considered simultaneously in the index definition to obtain accurate results.

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“…Second, it is difficult to define a drought which leads to confusion for not having a universal definition of drought. Third, drought impacts are non-structural and spread over large geographical areas than damages that may result from other natural hazards [1]. In contrast to floods, hurricanes, earthquakes, and tornadoes a drought affects water bodies of water resources structures and it seldom results in structural damage.…”

Section: Introductionmentioning

confidence: 99%

Drought Regionalization Based on Low Flow Trends in Selected River Basins in Slovakia

Zeleňáková¹,

Soľáková²,

Purcz³

et al. 2014

IJESD

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Abstract-An important function in both engineering hydrology and integrated catchment area management is performed by statistical analysis. This paper presents the trend analysis of low water flows in selected rivers in Eastern Slovakia. There are many statistical methods for data evaluation. The most of useful, presented in this paper, is the non-parametric Mann-Kendall test. This analysis was carried out for statistical data from 63 river stations lying in the eastern part of Slovakia, namely in Hornád, Poprad, Bodva, Bodrog river basins. The data were obtained from the Slovak Hydrometeorological Institute, Regional Centre Košice. Because the low flow data are not comparable for the individual stations, normally it is only possible to do the statistical analysis for each river station separately. The relative sizes of the low stream flow trends in individual river stations were calculated as directives of the trend lines. Using ArcView GIS was created thematic map from geographical map of Eastern Slovakia and was performed hydrological drought risk regionalization.

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A review of drought concepts

Cited by 3,824 publications

References 139 publications

Future discharge drought across climate regions around the world modelled with a synthetic hydrological modelling approach forced by three general circulation models

Future discharge drought across climate regions around the world modelled with a synthetic hydrological modelling approach forced by three general circulation models

Drought indices revisited – improving and testing of drought indices in a simulation of the last two millennia for Europe

Drought Regionalization Based on Low Flow Trends in Selected River Basins in Slovakia

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