Assessment of environmental flow release from Deduruoya reservoir to mitigate possible impacts on downstream ecosystem

River ecosystems are interlinked with river hydrology. However, construction of dams can modify the natural flow patterns which can lead to unpredictable consequences. Environmental flow (EF) releases can restore ecosystems or reverse the already occurred degradation. Having understood the importanc...
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Autor*in:	M. M. J. G. C. N. Jayasiri [verfasserIn] N. D. K. Dayawansa [verfasserIn] E. R. N. Gunawardena [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2017

Schlagwörter:	deduru oya reservoir, ecosystems, downstream water requirement, environmental flow, environmental flow assessment methods

Übergeordnetes Werk:	In: Tropical Agricultural Research - Postgraduate Institute of Agriculture, University of Peradeniya, 2019, 28(2017), 3
Übergeordnetes Werk:	volume:28 ; year:2017 ; number:3

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.4038/tar.v28i3.8233

Katalog-ID:	DOAJ010849912

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spelling	10.4038/tar.v28i3.8233 doi (DE-627)DOAJ010849912 (DE-599)DOAJ91dd6728da2c420cafbacfd7d88f5ede DE-627 ger DE-627 rakwb eng M. M. J. G. C. N. Jayasiri verfasserin aut Assessment of environmental flow release from Deduruoya reservoir to mitigate possible impacts on downstream ecosystem 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier River ecosystems are interlinked with river hydrology. However, construction of dams can modify the natural flow patterns which can lead to unpredictable consequences. Environmental flow (EF) releases can restore ecosystems or reverse the already occurred degradation. Having understood the importance of EF, large number of methods has been developed to estimate the EF. The objective of this study was to make a comparison between these methods to identify the most comprehensive method and to develop a novel approach to estimate EF based on the concept of minimum information requirement. Among the EF calculation methods studied, holistic method was identified as the most reliable category and the building block methodology (BBM) was identified as the best holistic method which requires more resources or data. The new methodology developed to assess EF basically based on BBM but efforts were taken to identify minimum data requirement approaches to calculate individual water uses. It consists of the flow requirement of riverine flora and fauna, social and cultural water requirement, wetland water requirement, longitudinal connectivity, flushing flow requirement, groundwater recharge and coastal water requirement. The EF requirement of downstream of DeduruOya reservoir was estimated using the developed method. The results were compared with the EF calculated using the Sri Lanka Environmental Flow Calculator model developed by IWMI. There was a significant difference between the EF calculated using new method and the results obtained using model developed by IWMI. Hence, it is recommended to further improve and verify the findings of the new method. deduru oya reservoir, ecosystems, downstream water requirement, environmental flow, environmental flow assessment methods Agriculture S N. D. K. Dayawansa verfasserin aut E. R. N. Gunawardena verfasserin aut In Tropical Agricultural Research Postgraduate Institute of Agriculture, University of Peradeniya, 2019 28(2017), 3 (DE-627)684963523 (DE-600)2648923-5 27060233 nnns volume:28 year:2017 number:3 https://doi.org/10.4038/tar.v28i3.8233 kostenfrei https://doaj.org/article/91dd6728da2c420cafbacfd7d88f5ede kostenfrei https://tar.sljol.info/articles/8233 kostenfrei https://doaj.org/toc/1016-1422 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 28 2017 3
allfields_unstemmed	10.4038/tar.v28i3.8233 doi (DE-627)DOAJ010849912 (DE-599)DOAJ91dd6728da2c420cafbacfd7d88f5ede DE-627 ger DE-627 rakwb eng M. M. J. G. C. N. Jayasiri verfasserin aut Assessment of environmental flow release from Deduruoya reservoir to mitigate possible impacts on downstream ecosystem 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier River ecosystems are interlinked with river hydrology. However, construction of dams can modify the natural flow patterns which can lead to unpredictable consequences. Environmental flow (EF) releases can restore ecosystems or reverse the already occurred degradation. Having understood the importance of EF, large number of methods has been developed to estimate the EF. The objective of this study was to make a comparison between these methods to identify the most comprehensive method and to develop a novel approach to estimate EF based on the concept of minimum information requirement. Among the EF calculation methods studied, holistic method was identified as the most reliable category and the building block methodology (BBM) was identified as the best holistic method which requires more resources or data. The new methodology developed to assess EF basically based on BBM but efforts were taken to identify minimum data requirement approaches to calculate individual water uses. It consists of the flow requirement of riverine flora and fauna, social and cultural water requirement, wetland water requirement, longitudinal connectivity, flushing flow requirement, groundwater recharge and coastal water requirement. The EF requirement of downstream of DeduruOya reservoir was estimated using the developed method. The results were compared with the EF calculated using the Sri Lanka Environmental Flow Calculator model developed by IWMI. There was a significant difference between the EF calculated using new method and the results obtained using model developed by IWMI. Hence, it is recommended to further improve and verify the findings of the new method. deduru oya reservoir, ecosystems, downstream water requirement, environmental flow, environmental flow assessment methods Agriculture S N. D. K. Dayawansa verfasserin aut E. R. N. Gunawardena verfasserin aut In Tropical Agricultural Research Postgraduate Institute of Agriculture, University of Peradeniya, 2019 28(2017), 3 (DE-627)684963523 (DE-600)2648923-5 27060233 nnns volume:28 year:2017 number:3 https://doi.org/10.4038/tar.v28i3.8233 kostenfrei https://doaj.org/article/91dd6728da2c420cafbacfd7d88f5ede kostenfrei https://tar.sljol.info/articles/8233 kostenfrei https://doaj.org/toc/1016-1422 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 28 2017 3
allfieldsGer	10.4038/tar.v28i3.8233 doi (DE-627)DOAJ010849912 (DE-599)DOAJ91dd6728da2c420cafbacfd7d88f5ede DE-627 ger DE-627 rakwb eng M. M. J. G. C. N. Jayasiri verfasserin aut Assessment of environmental flow release from Deduruoya reservoir to mitigate possible impacts on downstream ecosystem 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier River ecosystems are interlinked with river hydrology. However, construction of dams can modify the natural flow patterns which can lead to unpredictable consequences. Environmental flow (EF) releases can restore ecosystems or reverse the already occurred degradation. Having understood the importance of EF, large number of methods has been developed to estimate the EF. The objective of this study was to make a comparison between these methods to identify the most comprehensive method and to develop a novel approach to estimate EF based on the concept of minimum information requirement. Among the EF calculation methods studied, holistic method was identified as the most reliable category and the building block methodology (BBM) was identified as the best holistic method which requires more resources or data. The new methodology developed to assess EF basically based on BBM but efforts were taken to identify minimum data requirement approaches to calculate individual water uses. It consists of the flow requirement of riverine flora and fauna, social and cultural water requirement, wetland water requirement, longitudinal connectivity, flushing flow requirement, groundwater recharge and coastal water requirement. The EF requirement of downstream of DeduruOya reservoir was estimated using the developed method. The results were compared with the EF calculated using the Sri Lanka Environmental Flow Calculator model developed by IWMI. There was a significant difference between the EF calculated using new method and the results obtained using model developed by IWMI. Hence, it is recommended to further improve and verify the findings of the new method. deduru oya reservoir, ecosystems, downstream water requirement, environmental flow, environmental flow assessment methods Agriculture S N. D. K. Dayawansa verfasserin aut E. R. N. Gunawardena verfasserin aut In Tropical Agricultural Research Postgraduate Institute of Agriculture, University of Peradeniya, 2019 28(2017), 3 (DE-627)684963523 (DE-600)2648923-5 27060233 nnns volume:28 year:2017 number:3 https://doi.org/10.4038/tar.v28i3.8233 kostenfrei https://doaj.org/article/91dd6728da2c420cafbacfd7d88f5ede kostenfrei https://tar.sljol.info/articles/8233 kostenfrei https://doaj.org/toc/1016-1422 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 28 2017 3
allfieldsSound	10.4038/tar.v28i3.8233 doi (DE-627)DOAJ010849912 (DE-599)DOAJ91dd6728da2c420cafbacfd7d88f5ede DE-627 ger DE-627 rakwb eng M. M. J. G. C. N. Jayasiri verfasserin aut Assessment of environmental flow release from Deduruoya reservoir to mitigate possible impacts on downstream ecosystem 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier River ecosystems are interlinked with river hydrology. However, construction of dams can modify the natural flow patterns which can lead to unpredictable consequences. Environmental flow (EF) releases can restore ecosystems or reverse the already occurred degradation. Having understood the importance of EF, large number of methods has been developed to estimate the EF. The objective of this study was to make a comparison between these methods to identify the most comprehensive method and to develop a novel approach to estimate EF based on the concept of minimum information requirement. Among the EF calculation methods studied, holistic method was identified as the most reliable category and the building block methodology (BBM) was identified as the best holistic method which requires more resources or data. The new methodology developed to assess EF basically based on BBM but efforts were taken to identify minimum data requirement approaches to calculate individual water uses. It consists of the flow requirement of riverine flora and fauna, social and cultural water requirement, wetland water requirement, longitudinal connectivity, flushing flow requirement, groundwater recharge and coastal water requirement. The EF requirement of downstream of DeduruOya reservoir was estimated using the developed method. The results were compared with the EF calculated using the Sri Lanka Environmental Flow Calculator model developed by IWMI. There was a significant difference between the EF calculated using new method and the results obtained using model developed by IWMI. Hence, it is recommended to further improve and verify the findings of the new method. deduru oya reservoir, ecosystems, downstream water requirement, environmental flow, environmental flow assessment methods Agriculture S N. D. K. Dayawansa verfasserin aut E. R. N. Gunawardena verfasserin aut In Tropical Agricultural Research Postgraduate Institute of Agriculture, University of Peradeniya, 2019 28(2017), 3 (DE-627)684963523 (DE-600)2648923-5 27060233 nnns volume:28 year:2017 number:3 https://doi.org/10.4038/tar.v28i3.8233 kostenfrei https://doaj.org/article/91dd6728da2c420cafbacfd7d88f5ede kostenfrei https://tar.sljol.info/articles/8233 kostenfrei https://doaj.org/toc/1016-1422 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4367 GBV_ILN_4700 AR 28 2017 3
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author	M. M. J. G. C. N. Jayasiri
spellingShingle	M. M. J. G. C. N. Jayasiri misc deduru oya reservoir, ecosystems, downstream water requirement, environmental flow, environmental flow assessment methods misc Agriculture misc S Assessment of environmental flow release from Deduruoya reservoir to mitigate possible impacts on downstream ecosystem
authorStr	M. M. J. G. C. N. Jayasiri
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topic_title	Assessment of environmental flow release from Deduruoya reservoir to mitigate possible impacts on downstream ecosystem deduru oya reservoir, ecosystems, downstream water requirement, environmental flow, environmental flow assessment methods
topic	misc deduru oya reservoir, ecosystems, downstream water requirement, environmental flow, environmental flow assessment methods misc Agriculture misc S
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title	Assessment of environmental flow release from Deduruoya reservoir to mitigate possible impacts on downstream ecosystem
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title_full	Assessment of environmental flow release from Deduruoya reservoir to mitigate possible impacts on downstream ecosystem
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title_sort	assessment of environmental flow release from deduruoya reservoir to mitigate possible impacts on downstream ecosystem
title_auth	Assessment of environmental flow release from Deduruoya reservoir to mitigate possible impacts on downstream ecosystem
abstract	River ecosystems are interlinked with river hydrology. However, construction of dams can modify the natural flow patterns which can lead to unpredictable consequences. Environmental flow (EF) releases can restore ecosystems or reverse the already occurred degradation. Having understood the importance of EF, large number of methods has been developed to estimate the EF. The objective of this study was to make a comparison between these methods to identify the most comprehensive method and to develop a novel approach to estimate EF based on the concept of minimum information requirement. Among the EF calculation methods studied, holistic method was identified as the most reliable category and the building block methodology (BBM) was identified as the best holistic method which requires more resources or data. The new methodology developed to assess EF basically based on BBM but efforts were taken to identify minimum data requirement approaches to calculate individual water uses. It consists of the flow requirement of riverine flora and fauna, social and cultural water requirement, wetland water requirement, longitudinal connectivity, flushing flow requirement, groundwater recharge and coastal water requirement. The EF requirement of downstream of DeduruOya reservoir was estimated using the developed method. The results were compared with the EF calculated using the Sri Lanka Environmental Flow Calculator model developed by IWMI. There was a significant difference between the EF calculated using new method and the results obtained using model developed by IWMI. Hence, it is recommended to further improve and verify the findings of the new method.
abstractGer	River ecosystems are interlinked with river hydrology. However, construction of dams can modify the natural flow patterns which can lead to unpredictable consequences. Environmental flow (EF) releases can restore ecosystems or reverse the already occurred degradation. Having understood the importance of EF, large number of methods has been developed to estimate the EF. The objective of this study was to make a comparison between these methods to identify the most comprehensive method and to develop a novel approach to estimate EF based on the concept of minimum information requirement. Among the EF calculation methods studied, holistic method was identified as the most reliable category and the building block methodology (BBM) was identified as the best holistic method which requires more resources or data. The new methodology developed to assess EF basically based on BBM but efforts were taken to identify minimum data requirement approaches to calculate individual water uses. It consists of the flow requirement of riverine flora and fauna, social and cultural water requirement, wetland water requirement, longitudinal connectivity, flushing flow requirement, groundwater recharge and coastal water requirement. The EF requirement of downstream of DeduruOya reservoir was estimated using the developed method. The results were compared with the EF calculated using the Sri Lanka Environmental Flow Calculator model developed by IWMI. There was a significant difference between the EF calculated using new method and the results obtained using model developed by IWMI. Hence, it is recommended to further improve and verify the findings of the new method.
abstract_unstemmed	River ecosystems are interlinked with river hydrology. However, construction of dams can modify the natural flow patterns which can lead to unpredictable consequences. Environmental flow (EF) releases can restore ecosystems or reverse the already occurred degradation. Having understood the importance of EF, large number of methods has been developed to estimate the EF. The objective of this study was to make a comparison between these methods to identify the most comprehensive method and to develop a novel approach to estimate EF based on the concept of minimum information requirement. Among the EF calculation methods studied, holistic method was identified as the most reliable category and the building block methodology (BBM) was identified as the best holistic method which requires more resources or data. The new methodology developed to assess EF basically based on BBM but efforts were taken to identify minimum data requirement approaches to calculate individual water uses. It consists of the flow requirement of riverine flora and fauna, social and cultural water requirement, wetland water requirement, longitudinal connectivity, flushing flow requirement, groundwater recharge and coastal water requirement. The EF requirement of downstream of DeduruOya reservoir was estimated using the developed method. The results were compared with the EF calculated using the Sri Lanka Environmental Flow Calculator model developed by IWMI. There was a significant difference between the EF calculated using new method and the results obtained using model developed by IWMI. Hence, it is recommended to further improve and verify the findings of the new method.
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title_short	Assessment of environmental flow release from Deduruoya reservoir to mitigate possible impacts on downstream ecosystem
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up_date	2024-07-03T17:06:13.254Z
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