Copula based assessment of meteorological drought characteristics: Regional investigation of Iran

Nabaei, Sina; Sharafati, Ahmad; Yaseen‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬, Zaher Mundher; Shahid, Shamsuddin

doi:10.1016/j.agrformet.2019.06.010

Cited by 96 publications

(46 citation statements)

References 35 publications

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“…Nabaei et al . () reported short‐duration (2 and 3 months) severe and extreme droughts are more frequent in the north. Darand and Sohrabi () also identified northwest of Iran as the most drought‐prone area of Iran based on significant changes in daily precipitation.…”

Section: Discussionmentioning

confidence: 99%

“…The results reveal that short-duration droughts (6 months or less) are more frequent and severe in the northwest and the north along the Caspian plains while the longer-duration droughts (more than 6 months) are more frequent and severe in the south, southeast and southwest. Overall, the northwest region of Iran is found most susceptible to droughts in term of S, P and D. Droughts in Iran has been characterized with different indices in a large number of studies (Moradi et al, 2011;Tajbakhsh et al, 2015;Darand and Sohrabi, 2018;Nabaei et al, 2019). Nabaei et al (2019) reported shortduration (2 and 3 months) severe and extreme droughts are more frequent in the north.…”

Section: Discussionmentioning

confidence: 99%

“…Overall, the northwest region of Iran is found most susceptible to droughts in term of S, P and D. Droughts in Iran has been characterized with different indices in a large number of studies (Moradi et al, 2011;Tajbakhsh et al, 2015;Darand and Sohrabi, 2018;Nabaei et al, 2019). Nabaei et al (2019) reported shortduration (2 and 3 months) severe and extreme droughts are more frequent in the north. Darand and Sohrabi (2018) also identified northwest of Iran as the most drought-prone area of Iran based on significant changes in daily precipitation.…”

Section: Discussionmentioning

confidence: 99%

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Spatial assessment of meteorological drought features over different climate regions in Iran

Sharafati

Nabaei

Shahid

2019

Intl Journal of Climatology

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Iran has a predominantly arid and semi‐arid climate where the drought hazards and their variability are the crucial concerns for water resources management. This study assesses the characteristics and trends of meteorological droughts features in different climate regions of Iran. Monthly rainfall data are analysed using Standardized Precipitation Index (SPI) to reconstruct meteorological droughts for different time steps (1, 3, 6, 9 and 12). The drought events are decomposed into three features, namely Severity (S), Duration (D) and Peak (P) to assess their spatial variations in different climate regions. The Mann–Kendall (MK) test is used to detect the trends in drought features in different climate regions. The percentage area (PA) of increasing/decreasing trend in drought features is computed to assess the spatial variations of trends in each region. Besides, SPI is compared with Standardized Precipitation Evapotranspiration Index (SPEI) to understand the importance of evapotranspiration on meteorological droughts. The high correlations between SPI and SPEI indicate that the results obtained using SPI would not vary if a similar analysis is conducted using SPEI. The results obtained using SPI reveal that short‐duration droughts (6 months or less) are more frequent and severe in the northwest and the north along the Caspian plains while the longer‐duration droughts (more than 6 months) are more frequent and severe in the south, southeast and southwest. Overall, the northwest region of Iran is found most susceptible to droughts in terms of S, P and D. Moderate (40% < PA < 60%) or significant (PA > 60%) increase in the drought features are observed in all climate regions for shorter SPI (3 months or less) except northwest, while no drought feature is found to increase significantly for SPI‐12. Overall, the higher increase in drought S, P and D are found in the central arid region and at higher altitudes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Spatial assessment of meteorological drought features over different climate regions in Iran

Sharafati

Nabaei

Shahid

2019

Intl Journal of Climatology

Self Cite

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“…The Intergovernmental Panel on Climate Change (IPCC) 5th Assessment Report, Small Islands Chapter, noted that there are advances at the regional scale rather than country specific and stated that there is a "need to acknowledge the heterogeneity and complexity of small island states and territories" [2]. In the management of droughts the assessment of spatial and temporal variability is important [3]. This assessment maybe used to create a drought baseline that describes the nature of the historical droughts' frequency of occurrence, and the temporal and spatial patterns.…”

Section: Introductionmentioning

confidence: 99%

A 35-year meteorological drought analysis in the Caribbean Region: case study of the small island state of Trinidad and Tobago

et al. 2019

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Small island states are vulnerable to changes in extreme weather events. In order to mitigate the effects of these events such as droughts, the understanding of the patterns of meteorological droughts is one of the first steps. This study aims to build a baseline scenario of meteorological droughts using the Standardized Precipitation Index (SPI) for the southernmost Caribbean islands of Trinidad and Tobago. Fourteen precipitation datasets, for the period 1980 to 2014, were analyzed to identify and assess temporal and spatial variations of droughts. The relevant SPI temporal intervals for the area are 2-M (Month), 5-M Dry and 7-M Wet corresponding to the dry and wet seasons and 12-M. Meteorological droughts were found to be heterogeneous in occurrence, magnitude, severity and frequency across Trinidad. Meteorological droughts were identified in the following years; for the 2

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“…Drought has a critical impact on water resource-dependent sectors, such as agriculture, raising concerns about the capacity to meet water and food demands [7].Drought is classified into four types-meteorological, hydrological, agricultural, and ocioeconomic [8][9][10]. Meteorological drought is defined by lack of precipitation [11][12][13][14]. Hydrological drought refers to persistently decreasing discharge volume in streams and reservoirs over a period of months or years [15][16][17].…”

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confidence: 99%

Unsustainability Syndrome—From Meteorological to Agricultural Drought in Arid and Semi-Arid Regions

Haghighi

Zaki

Rossi

et al. 2020

Water

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Water is the most important resource for sustainable agriculture in arid and semi-arid regions, where agriculture is the mainstay for rural societies. By relating the water usage to renewable water resources, we define three stages from sustainable to unsustainable water resources: (1) sustainable, where water use is matched by renewable water capacity, ensuring sustainable water resources; (2) transitional, where water use occasionally exceeds renewable water capacity; and (3) unsustainable, with lack of water resources for agriculture, society, and the environment. Using available drought indicators (standardized precipitation index (SPI) and streamflow drought index (SDI)) and two new indices for agricultural drought (overall agricultural drought index (OADI) and agricultural drought index (ADI)), we evaluated these stages using the example of Fars province in southern Iran in the period 1977–2016. A hyper-arid climate prevailed for an average of 32% of the province’s spatio-temporal coverage during the study period. The area increased significantly from 30.6% in the first decade (1977–1986) to 44.4% in the last (2006–2015). The spatiotemporal distribution of meteorological drought showed no significant negative trends in annual precipitation during 1977–2016, but the occurrence of hydrological droughts increased significantly in the period 1997–2016. The expansion of irrigated area, with more than 60% of rainfed agriculture replaced by irrigated agriculture (especially between 1997 and 2006), exerted substantial pressure on surface water and groundwater resources. Together, climate change, reduced river flow, and significant declines in groundwater level in major aquifers led to unsustainable use of water resources, a considerable reduction in irrigated area, and unsustainability in agricultural production in the period 2006–2015. Analysis of causes and effects of meteorological, hydrological, and agricultural drought in the area identified three clear stages: before 1997 being sustainable, 1997–2006 being transitional, and after 2006 being unsustainable.

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Copula based assessment of meteorological drought characteristics: Regional investigation of Iran

Cited by 96 publications

References 35 publications

Spatial assessment of meteorological drought features over different climate regions in Iran

Spatial assessment of meteorological drought features over different climate regions in Iran

A 35-year meteorological drought analysis in the Caribbean Region: case study of the small island state of Trinidad and Tobago

Unsustainability Syndrome—From Meteorological to Agricultural Drought in Arid and Semi-Arid Regions

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