Implications of storage state behaviour of village tanks in adaptation to climate change, Sri Lanka

Following Decision 1/CP.21 of the Conference of the Parties, Sri Lanka has identified Nationally Determined Contributions for adaptation to climate change. Restoration and rehabilitation of all abandoned tanks is one such contribution in the irrigation sector. The country has around 13,600 working v...

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Autores principales:	K. T. N. Perera, T. M. N. Wijayaratna, H. M. Jayatillake, Tilak Priyadarshana, J. M. A. Manatunge
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	climate change adaptation reliability resilience storage states transition probability village tanks Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/faf0279c355d436488d203e78d9ad4f1
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id	oai:doaj.org-article:faf0279c355d436488d203e78d9ad4f1
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spelling	oai:doaj.org-article:faf0279c355d436488d203e78d9ad4f12021-11-05T18:48:18ZImplications of storage state behaviour of village tanks in adaptation to climate change, Sri Lanka2040-22442408-935410.2166/wcc.2020.285https://doaj.org/article/faf0279c355d436488d203e78d9ad4f12021-05-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/3/844https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354Following Decision 1/CP.21 of the Conference of the Parties, Sri Lanka has identified Nationally Determined Contributions for adaptation to climate change. Restoration and rehabilitation of all abandoned tanks is one such contribution in the irrigation sector. The country has around 13,600 working village tanks of ancient origin. These restored tanks provide irrigation and other water needs at different degrees while a large number of tanks remain abandoned. However, regional storage behaviour of the restored tanks is not adequately understood due to the non-existence of a methodology for storage data collection and assessment. The study presents a statistical approach to assess regional storage behaviour of the tanks with data collected using five storage states method. The storage data of 573 working village tanks in southern Sri Lanka covering three years were analyzed, and revealed a high temporal variation of storage behaviour and low resilience to recover from either dryness or failure for providing irrigation water issues. However, higher time-reliability of water-existence below sluice sill level indicates their potential for providing social and environmental needs. Such assessments facilitate identifying real-time management measures and reviewing policy on restoration of similar reservoirs as an adaptation option for climate change in any region. HIGHLIGHTS Use of five state assessment methods to monitor the storage behaviour of small scale reservoirs where storage measurements are not available.; Use of statistical approach to analyse storage behavoiur on a regional basis.; Analysis of storage behaviour using storage state and storage state transitions.; Comparison of seasonal storage behavior of reservoirs using state transition probabilities.; Assessment of resilience and reliability of reservoirs using storage state behaviour.;K. T. N. PereraT. M. N. WijayaratnaH. M. JayatillakeTilak PriyadarshanaJ. M. A. ManatungeIWA Publishingarticleclimate change adaptationreliabilityresiliencestorage statestransition probabilityvillage tanksEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 3, Pp 844-857 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	climate change adaptation reliability resilience storage states transition probability village tanks Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	climate change adaptation reliability resilience storage states transition probability village tanks Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 K. T. N. Perera T. M. N. Wijayaratna H. M. Jayatillake Tilak Priyadarshana J. M. A. Manatunge Implications of storage state behaviour of village tanks in adaptation to climate change, Sri Lanka
description	Following Decision 1/CP.21 of the Conference of the Parties, Sri Lanka has identified Nationally Determined Contributions for adaptation to climate change. Restoration and rehabilitation of all abandoned tanks is one such contribution in the irrigation sector. The country has around 13,600 working village tanks of ancient origin. These restored tanks provide irrigation and other water needs at different degrees while a large number of tanks remain abandoned. However, regional storage behaviour of the restored tanks is not adequately understood due to the non-existence of a methodology for storage data collection and assessment. The study presents a statistical approach to assess regional storage behaviour of the tanks with data collected using five storage states method. The storage data of 573 working village tanks in southern Sri Lanka covering three years were analyzed, and revealed a high temporal variation of storage behaviour and low resilience to recover from either dryness or failure for providing irrigation water issues. However, higher time-reliability of water-existence below sluice sill level indicates their potential for providing social and environmental needs. Such assessments facilitate identifying real-time management measures and reviewing policy on restoration of similar reservoirs as an adaptation option for climate change in any region. HIGHLIGHTS Use of five state assessment methods to monitor the storage behaviour of small scale reservoirs where storage measurements are not available.; Use of statistical approach to analyse storage behavoiur on a regional basis.; Analysis of storage behaviour using storage state and storage state transitions.; Comparison of seasonal storage behavior of reservoirs using state transition probabilities.; Assessment of resilience and reliability of reservoirs using storage state behaviour.;
format	article
author	K. T. N. Perera T. M. N. Wijayaratna H. M. Jayatillake Tilak Priyadarshana J. M. A. Manatunge
author_facet	K. T. N. Perera T. M. N. Wijayaratna H. M. Jayatillake Tilak Priyadarshana J. M. A. Manatunge
author_sort	K. T. N. Perera
title	Implications of storage state behaviour of village tanks in adaptation to climate change, Sri Lanka
title_short	Implications of storage state behaviour of village tanks in adaptation to climate change, Sri Lanka
title_full	Implications of storage state behaviour of village tanks in adaptation to climate change, Sri Lanka
title_fullStr	Implications of storage state behaviour of village tanks in adaptation to climate change, Sri Lanka
title_full_unstemmed	Implications of storage state behaviour of village tanks in adaptation to climate change, Sri Lanka
title_sort	implications of storage state behaviour of village tanks in adaptation to climate change, sri lanka
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/faf0279c355d436488d203e78d9ad4f1
work_keys_str_mv	AT ktnperera implicationsofstoragestatebehaviourofvillagetanksinadaptationtoclimatechangesrilanka AT tmnwijayaratna implicationsofstoragestatebehaviourofvillagetanksinadaptationtoclimatechangesrilanka AT hmjayatillake implicationsofstoragestatebehaviourofvillagetanksinadaptationtoclimatechangesrilanka AT tilakpriyadarshana implicationsofstoragestatebehaviourofvillagetanksinadaptationtoclimatechangesrilanka AT jmamanatunge implicationsofstoragestatebehaviourofvillagetanksinadaptationtoclimatechangesrilanka
_version_	1718444141218627584

Implications of storage state behaviour of village tanks in adaptation to climate change, Sri Lanka

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