Drought detection in Java Island based on Standardized Precipitation and Evapotranspiration Index (SPEI)

This study reports a drought analysis which was carried out using the Standardized Precipitation and Evapotranspiration Index (SPEI) to determine the spatial and temporal level of drought risk in Java, Indonesia. Apart from using the SPEI, this study also used the SPI (Standardized Precipitation Ind...

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Autores principales:	Suroso, Dede Nadhilah, Ardiansyah, Edvin Aldrian
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	drought indonesia java island spei Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/2660c54020a64b2e88f2fc7b37dee440
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spelling	oai:doaj.org-article:2660c54020a64b2e88f2fc7b37dee4402021-11-05T19:08:01ZDrought detection in Java Island based on Standardized Precipitation and Evapotranspiration Index (SPEI)2040-22442408-935410.2166/wcc.2021.022https://doaj.org/article/2660c54020a64b2e88f2fc7b37dee4402021-09-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/6/2734https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354This study reports a drought analysis which was carried out using the Standardized Precipitation and Evapotranspiration Index (SPEI) to determine the spatial and temporal level of drought risk in Java, Indonesia. Apart from using the SPEI, this study also used the SPI (Standardized Precipitation Index) as a comparison in detecting drought and also validated with historical drought occurrences. Temporal variations of SPI and SPEI values were discussed by considering different timescales (monthly to yearly). Pearson's correlations between both drought indices were calculated to see how similar both indices were. Also, the Kolmogorov–Smirnov tests were used for the similarity test of two kinds of distributions. The results obtained from this analysis showed that the correlation coefficient between the SPI and SPEI models was relatively high on a monthly scale and consistently increased along with the increase of temporal scales but had a decreasing trend during the dry season. However, the SPI detected drought severity with an excessively high estimate in comparison with the SPEI. Greater spatial extents of drought estimation were also generated by SPI followed by SPEI in comparison to factual drought occurrences. As a consequence, SPEI becomes more moderate and SPI as a conservative approach for estimating drought events. HIGHLIGHTS The drought severity generated by SPI is revealed to be systematically higher than SPEI for most of the given month period.; In detecting drought, SPI is very conservative, while SPEI is moderate.; The correlation between SPI and SPEI will be stronger if the timescale used is longer.; Rainfall is the main cause of the drought, but the existence of evapotranspiration becomes important for a longer timescale.;SurosoDede NadhilahArdiansyahEdvin AldrianIWA Publishingarticledroughtindonesiajava islandspeiEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 6, Pp 2734-2752 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	drought indonesia java island spei Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	drought indonesia java island spei Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Suroso Dede Nadhilah Ardiansyah Edvin Aldrian Drought detection in Java Island based on Standardized Precipitation and Evapotranspiration Index (SPEI)
description	This study reports a drought analysis which was carried out using the Standardized Precipitation and Evapotranspiration Index (SPEI) to determine the spatial and temporal level of drought risk in Java, Indonesia. Apart from using the SPEI, this study also used the SPI (Standardized Precipitation Index) as a comparison in detecting drought and also validated with historical drought occurrences. Temporal variations of SPI and SPEI values were discussed by considering different timescales (monthly to yearly). Pearson's correlations between both drought indices were calculated to see how similar both indices were. Also, the Kolmogorov–Smirnov tests were used for the similarity test of two kinds of distributions. The results obtained from this analysis showed that the correlation coefficient between the SPI and SPEI models was relatively high on a monthly scale and consistently increased along with the increase of temporal scales but had a decreasing trend during the dry season. However, the SPI detected drought severity with an excessively high estimate in comparison with the SPEI. Greater spatial extents of drought estimation were also generated by SPI followed by SPEI in comparison to factual drought occurrences. As a consequence, SPEI becomes more moderate and SPI as a conservative approach for estimating drought events. HIGHLIGHTS The drought severity generated by SPI is revealed to be systematically higher than SPEI for most of the given month period.; In detecting drought, SPI is very conservative, while SPEI is moderate.; The correlation between SPI and SPEI will be stronger if the timescale used is longer.; Rainfall is the main cause of the drought, but the existence of evapotranspiration becomes important for a longer timescale.;
format	article
author	Suroso Dede Nadhilah Ardiansyah Edvin Aldrian
author_facet	Suroso Dede Nadhilah Ardiansyah Edvin Aldrian
author_sort	Suroso
title	Drought detection in Java Island based on Standardized Precipitation and Evapotranspiration Index (SPEI)
title_short	Drought detection in Java Island based on Standardized Precipitation and Evapotranspiration Index (SPEI)
title_full	Drought detection in Java Island based on Standardized Precipitation and Evapotranspiration Index (SPEI)
title_fullStr	Drought detection in Java Island based on Standardized Precipitation and Evapotranspiration Index (SPEI)
title_full_unstemmed	Drought detection in Java Island based on Standardized Precipitation and Evapotranspiration Index (SPEI)
title_sort	drought detection in java island based on standardized precipitation and evapotranspiration index (spei)
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/2660c54020a64b2e88f2fc7b37dee440
work_keys_str_mv	AT suroso droughtdetectioninjavaislandbasedonstandardizedprecipitationandevapotranspirationindexspei AT dedenadhilah droughtdetectioninjavaislandbasedonstandardizedprecipitationandevapotranspirationindexspei AT ardiansyah droughtdetectioninjavaislandbasedonstandardizedprecipitationandevapotranspirationindexspei AT edvinaldrian droughtdetectioninjavaislandbasedonstandardizedprecipitationandevapotranspirationindexspei
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Drought detection in Java Island based on Standardized Precipitation and Evapotranspiration Index (SPEI)

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