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http://dx.doi.org/10.5389/KSAE.2013.55.6.167

Analysis of Nutrient Load Balance in the Reservoir Irrigated Paddy Block  

Song, Jung-Hun (서울대학교 농업생명과학대학 생태조경.지역시스템공학부)
Kang, Moon-Seong (서울대학교 농업생명과학대학 조경.지역시스템공학부, 농업생명과학연구원)
Song, Inhong (서울대학교 농업생명과학연구원)
Hwang, Soon-Ho (서울대학교 농업생명과학대학 생태조경.지역시스템공학부)
Park, Jihoon (서울대학교 농업생명과학대학 생태조경.지역시스템공학부)
Jun, Sang-Min (서울대학교 농업생명과학대학 생태조경.지역시스템공학부)
Kim, Kye-Ung (서울대학교 농업생명과학대학 생태조경.지역시스템공학부)
Jang, Jeong-Ryeol (한국농어촌공사 농어촌연구원)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.55, no.6, 2013 , pp. 167-175 More about this Journal
Abstract
The objective of this study was to investigate the nutrient load balance in the reservoir irrigated paddy block during growing seasons. Idong reservoir irrigation paddy block of 10.3 ha in size was selected to collect hydrologic and water quality data. Irrigation, canal flows, and paddy field drainage were measured using a water level gauge, while water samples were collected and analysed for water quality. The water balance analysis showed that 81 % and 75 % of total outflow were through paddy and irrigation canal drainage during 2011 and 2012, respectively. The water quality of paddy field drainage varied greatly depending on rice cultivation stage ranging from 0.05 to 24.55 mg/L and from 0.01 to 0.76 mg/L for T-N and T-P, correspondently. Paddy field drainage loads during May through June account for 64 % and 76 % in 2012 and 2013, while 82 % and 81 % for T-P in 2011 and 2012, respectively. The Pearson correlation analysis showed that rainfall was significantly correlated with nutrient loads during July through August due to runoff, and irrigation was related with nutrient loads of drainage during some period of July through September due to irrigation return flow. This study results showed characteristics of inflow and outflow nutrient loads from plentiful irrigated paddy block.
Keywords
Paddy; nutrient; water balance; water quality; mass balance;
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Times Cited By KSCI : 10  (Citation Analysis)
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