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Rice irrigation scheduling incorporating stochastic rainfall

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Main Authors: Lee, Teang Shui, Md. Aminul Haque
Format: Article
Language:English
Published: The Institution of Engineers, Malaysia 2011
Subjects:
Stochastic rainfall
Irrigation delivery
Rice irrigation performance
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/13577
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spelling my.unimap-135772011-08-22T01:12:28Z Rice irrigation scheduling incorporating stochastic rainfall Lee, Teang Shui Md. Aminul Haque Stochastic rainfall Irrigation delivery Rice irrigation performance Link to publisher's homepage at http://www.myiem.org.my/ An irrigation-scheduling program has been developed to increase irrigation efficiency in a large-scale rice irrigation project in Malaysia. The study focused on predicting daily irrigation deliveries for the main season and off-season and its performance was analyzed. A water balance approach in which rainfall was considered as a stochastic variable was used. Markov chain was used to describe the random occurrence of daily rainfall, and a skewed normal distribution was applied to generate the amount of rainfall on rainy days. Predicted rainfall and evapotranspiration values were later used to estimate weekly irrigation deliveries through the water balance equation. Comparison of the observed and predicted irrigation deliveries values for the 2000/2001 season showed that the observed values were higher than the predicted value indicating excess water supply in the field. It was observed that by modifying the existing schedules, it could save a considerable amount of irrigation water during both the main and off seasons. The periodic results obtained could be used to monitor the allocation of irrigation deliveries for improving the water management system. The present irrigation system was evaluated using an adequacy indicator. The adequacy indicator was computed by comparing the crop water requirement with the water release data. This computation provides information on the uniformity of water distribution and any shortfall or excess. 2011-08-22T01:12:28Z 2011-08-22T01:12:28Z 2004-09 Article The Journal of the Institution of Engineers, Malaysia, vol. 65(3/4), 2004, pages 6-12 0126-513X http://myiem.org.my/content/iem_journal_2004-175.aspx http://hdl.handle.net/123456789/13577 en The Institution of Engineers, Malaysia
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Stochastic rainfall
Irrigation delivery
Rice irrigation performance
spellingShingle Stochastic rainfall
Irrigation delivery
Rice irrigation performance
Lee, Teang Shui
Md. Aminul Haque
Rice irrigation scheduling incorporating stochastic rainfall
description Link to publisher's homepage at http://www.myiem.org.my/
format Article
author Lee, Teang Shui
Md. Aminul Haque
author_facet Lee, Teang Shui
Md. Aminul Haque
author_sort Lee, Teang Shui
title Rice irrigation scheduling incorporating stochastic rainfall
title_short Rice irrigation scheduling incorporating stochastic rainfall
title_full Rice irrigation scheduling incorporating stochastic rainfall
title_fullStr Rice irrigation scheduling incorporating stochastic rainfall
title_full_unstemmed Rice irrigation scheduling incorporating stochastic rainfall
title_sort rice irrigation scheduling incorporating stochastic rainfall
publisher The Institution of Engineers, Malaysia
publishDate 2011
url http://dspace.unimap.edu.my/xmlui/handle/123456789/13577
_version_ 1643790893214334976
score 13.222552

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