Modeling Irrigation Water Demand in a Tropical Paddy Cultivated Area in the Context of Climate Change

Irrigation is the major user of total water use in most of the tropical countries located in Southeast Asia. Therefore, knowledge on future changes in irrigation demand in the context of climate change is very important for long-term planning and management of water resources of the region. This pa...

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Main Authors:	Nurul Nadrah Aqilah, Tukimat, Sobri, Harun, Shamsuddin, Shahid
Format:	Article
Language:	English
Published:	ASCE 2017
Subjects:	S Agriculture (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/17629/ http://umpir.ump.edu.my/id/eprint/17629/ http://umpir.ump.edu.my/id/eprint/17629/ http://umpir.ump.edu.my/id/eprint/17629/1/journal%20jwrpm.pdf

id	ump-17629
recordtype	eprints
spelling	ump-176292018-05-21T02:41:00Z http://umpir.ump.edu.my/id/eprint/17629/ Modeling Irrigation Water Demand in a Tropical Paddy Cultivated Area in the Context of Climate Change Nurul Nadrah Aqilah, Tukimat Sobri, Harun Shamsuddin, Shahid S Agriculture (General) Irrigation is the major user of total water use in most of the tropical countries located in Southeast Asia. Therefore, knowledge on future changes in irrigation demand in the context of climate change is very important for long-term planning and management of water resources of the region. This paper investigated the changes in irrigation water demand in an intensive irrigated area of Malaysia under climate change scenario. Global circulation models (GCMs) outputs are downscaled using statistical downscaling model (SDSM) to project the future changes in rainfall and temperature at local scale. The irrigation water demand estimation model known as CROPWAT is calibrated and validated with historical data and then used to project the future changes in irrigation demand under SDSM projected climatic condition. The results show that temperature and rainfall in the area will increase by 0.2° C and 4% per decade, respectively over the time period 2020–2099. The changes in climate will reduce irrigation water demand at a rate of 0.9% per decade in the area. However, the irrigation demand will be much more variable in future, and therefore, the major challenge in water resources management will be to handle the uncertainty. It is expected that the seasonal and annual variations in irrigation demand projected by the study will help in operating reservoirs and sustainable management of water resources in the region in the context of climate change. ASCE 2017-03-10 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/17629/1/journal%20jwrpm.pdf Nurul Nadrah Aqilah, Tukimat and Sobri, Harun and Shamsuddin, Shahid (2017) Modeling Irrigation Water Demand in a Tropical Paddy Cultivated Area in the Context of Climate Change. Journal of Water Resources Planning and Management, 143 (7). pp. 1-8. ISSN 0733-9496 http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29WR.1943-5452.0000753 DOI: 10.1061/(ASCE)WR.1943-5452.0000753
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	S Agriculture (General)
spellingShingle	S Agriculture (General) Nurul Nadrah Aqilah, Tukimat Sobri, Harun Shamsuddin, Shahid Modeling Irrigation Water Demand in a Tropical Paddy Cultivated Area in the Context of Climate Change
description	Irrigation is the major user of total water use in most of the tropical countries located in Southeast Asia. Therefore, knowledge on future changes in irrigation demand in the context of climate change is very important for long-term planning and management of water resources of the region. This paper investigated the changes in irrigation water demand in an intensive irrigated area of Malaysia under climate change scenario. Global circulation models (GCMs) outputs are downscaled using statistical downscaling model (SDSM) to project the future changes in rainfall and temperature at local scale. The irrigation water demand estimation model known as CROPWAT is calibrated and validated with historical data and then used to project the future changes in irrigation demand under SDSM projected climatic condition. The results show that temperature and rainfall in the area will increase by 0.2° C and 4% per decade, respectively over the time period 2020–2099. The changes in climate will reduce irrigation water demand at a rate of 0.9% per decade in the area. However, the irrigation demand will be much more variable in future, and therefore, the major challenge in water resources management will be to handle the uncertainty. It is expected that the seasonal and annual variations in irrigation demand projected by the study will help in operating reservoirs and sustainable management of water resources in the region in the context of climate change.
format	Article
author	Nurul Nadrah Aqilah, Tukimat Sobri, Harun Shamsuddin, Shahid
author_facet	Nurul Nadrah Aqilah, Tukimat Sobri, Harun Shamsuddin, Shahid
author_sort	Nurul Nadrah Aqilah, Tukimat
title	Modeling Irrigation Water Demand in a Tropical Paddy Cultivated Area in the Context of Climate Change
title_short	Modeling Irrigation Water Demand in a Tropical Paddy Cultivated Area in the Context of Climate Change
title_full	Modeling Irrigation Water Demand in a Tropical Paddy Cultivated Area in the Context of Climate Change
title_fullStr	Modeling Irrigation Water Demand in a Tropical Paddy Cultivated Area in the Context of Climate Change
title_full_unstemmed	Modeling Irrigation Water Demand in a Tropical Paddy Cultivated Area in the Context of Climate Change
title_sort	modeling irrigation water demand in a tropical paddy cultivated area in the context of climate change
publisher	ASCE
publishDate	2017
url	http://umpir.ump.edu.my/id/eprint/17629/ http://umpir.ump.edu.my/id/eprint/17629/ http://umpir.ump.edu.my/id/eprint/17629/ http://umpir.ump.edu.my/id/eprint/17629/1/journal%20jwrpm.pdf
first_indexed	2023-09-18T22:24:28Z
last_indexed	2023-09-18T22:24:28Z
_version_	1777415873600946176

Modeling Irrigation Water Demand in a Tropical Paddy Cultivated Area in the Context of Climate Change

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