Impact of climate change on the severity, duration, and frequency of drought in a semi-arid agricultural basin

Hosseinizadeh, Atie; SeyedKaboli, Hesam; Zareie, Heidar; Akhondali, A M; Farjad, Babak

doi:10.1186/s40677-015-0031-8

Cited by 37 publications

(13 citation statements)

References 27 publications

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“…However, drought indices based on only rainfall data are simple to compute and found to perform better (Oladipo 1985). Among the commonly used indices that use rainfall data, Standardized Precipitation Index, SPI (Mckee et al 1993) is frequently applied worldwide (Hosseinizadeh et al 2015) for drought assessment. The World Meteorological Organization (WMO) considered SPI as a standard drought monitoring index (Hayes et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal appraisal of drought jeopardy over the Gangetic West Bengal, eastern India

Ghosh

2019

Geoenviron Disasters

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Background: In the contemporary era of global warming there is growing need to detail geographical variations of drought risk so as to investigate the impact of climate change in the densely populated agricultural tract of Gangetic West Bengal (GWB), eastern India. In aim to assess drought jeopardy at the regional scale, the present study deals with temporal trend and spatial pattern of drought during the last century over GWB. Standardized Precipitation Index (SPI) has been used to detail geographical variations of drought intensity, duration, frequency etc. at multiple time steps. Non-parametric Mann-Kendall test and Sen's slope estimator are used to detect the trends and trends slope. In addition, the article focuses on developing a Composite Drought Risk Index (CDRI) integrating 10 parameters pertaining to drought exposure to detect which regions are most exposed to drought. Results: The results portray a very diverse but consistent picture. The last century exhibits some consecutive deficit and surplus phases and after 1950s the extremity of surplus and deficit as well as drought duration have increased substantially. The impact of drought is expected to be rigorous at or adjacent areas of the western degraded plateau, particularly the northern Rarh and moribund delta where the drought intensities tend to increase while the rainfall as well as recurrence interval of drought tend to decrease. Conclusions: In a nutshell, this work provides evidences demonstrating the extension and intensification of aridity in the northern Rarh plain and Moribund delta. Such altered hydrolo-meteorological system hence calls for review of the agricultural practices and water use in GWB. The CDRI provides a means of obtaining a broad overview of drought risk and supposed to allow decision makers more in-depth investigation.

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Section: Introductionmentioning

confidence: 99%

Spatial and temporal appraisal of drought jeopardy over the Gangetic West Bengal, eastern India

Ghosh

2019

Geoenviron Disasters

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“…Studies on the impact of drought have been undertaken in various parts of the world (Oladipo 1993;Obaje et al, 2013;Wu et al, 2015aWu et al, , 2015bOlagunju 2015;Hosseinizadeh et al 2015;Um et al 2017;LIU et al 2018;Yue et al 2018). Majority of the studies concentrated on the impact of drought on agriculture, health, water resources, causes and effects on the land, mitigation and the extent of drought.…”

Section: Introductionmentioning

confidence: 99%

Drought occurrences and its implications on the households in Yobe state, Nigeria

Eze

2018

Geoenviron Disasters

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The study assesses the extent of droughts and its implications on the households in the study area. This is to highlight the need to integrate drought adaptation options into the government development plans. Strategies for drought adaptation options in the study area have often been made without experimental foundations placed on the extent of drought and its implications on the households. To achieve this, the study employed Normalized Rainfall Index (NRI) to determine the extent of droughts and its implications on the households, which has much to offer in terms of policy decisions. The study also utilized questionnaire administrated to 400 households to determine the annual income from different occupations that yielded more income to the people in the study area using one-way analysis of variance (ANOVA). The NRI shows that the study area was characterized by mild to severe drought events. The first (1986-1995) and third (2006-2017) decades experienced high incidences of droughts, while the second decade (1996-2005), witnessed the least incidences of droughts. The result of the economic activities of the households reveals that 65% of the total household respondents were involved in farming, while 35% were involved in non-farming activities as their major source of livelihood. The analysis of variance on the economic activities that generated more income to the households in Yobe State shows that farming activities provided more opportunities for income generation. Consequently, agriculture in the study area is currently being constrained by the frequent occurrence of droughts. Thus, there is a need for integrated development schemes aimed at livelihood diversification and increasing the adaptive capacity of households to drought in the study area.

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“…However, it is likely that temporal variation in baseline environmental conditions may play an important role in shaping flow‐ecology relationships. Furthermore, global climate change is predicted to alter the hydrologic cycle, resulting in increased intensity, duration, and extent of drought and extreme weather events (Farjad, Gupta, & Marceau, ; Hosseinizadeh, Seyedkaboli, Zarei, Akhondali, & Farad, ; Masson‐Delmotte et al., ; Wilhite, Sivakumar, & Pulwarty, ; Xenopolous et al., ), which might further confound predictions about flow‐ecology relationships and management recommendations based on those predictions.…”

Section: Introductionmentioning

confidence: 99%

The influence of drought on flow‐ecology relationships in Ozark Highland streams

2018

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Drought and summer drying can have strong effects on abiotic and biotic components of stream ecosystems. Environmental flow‐ecology relationships may be affected by drought and drying, adding further uncertainty to the already complex interaction of flow with other environmental variables, including geomorphology and water quality. Environment–ecology relationships in stream communities in Ozark Highland streams, USA, were examined over two years with contrasting environmental conditions, a drought year (2012) and a flood year (2013). We analysed fish, crayfish and benthic macroinvertebrate assemblages using two different approaches: (1) a multiple regression analysis incorporating predictor variables related to habitat, water quality, geomorphology and hydrology and (2) a canonical ordination procedure using only hydrologic variables in which forward selection was used to select predictors that were most related to our response variables. Reach‐scale habitat quality and geomorphology were found to be the most important influences on community structure, but hydrology was also important, particularly during the flood year. We also found substantial between‐year variation in environment–ecology relationships. Some ecological responses differed significantly between drought and flood years, while others remained consistent. We found that magnitude was the most important flow component overall, but that there was a shift in relative importance from low flow metrics during the drought year to average flow metrics during the flood year, and the specific metrics of importance varied markedly between assemblages and years. Findings suggest that understanding temporal variation in flow‐ecology relationships may be crucial for resource planning. While some relationships show temporal variation, others are consistent between years. Additionally, different kinds of hydrologic variables can differ greatly in terms of which assemblages they affect and how they affect them. Managers can address this complexity by focusing on relationships that are temporally stable and flow metrics that are consistently important across groups, such as flood frequency and flow variability.

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Impact of climate change on the severity, duration, and frequency of drought in a semi-arid agricultural basin

Cited by 37 publications

References 27 publications

Spatial and temporal appraisal of drought jeopardy over the Gangetic West Bengal, eastern India

Spatial and temporal appraisal of drought jeopardy over the Gangetic West Bengal, eastern India

Drought occurrences and its implications on the households in Yobe state, Nigeria

The influence of drought on flow‐ecology relationships in Ozark Highland streams

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