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http://dx.doi.org/10.15681/KSWE.2016.32.2.183

Evaluation of SRI Water Management on the Reduction of Irrigation Supply and NPS Pollution in Paddies  

Seo, Jiyeon (National Institute of Environmental Research)
Park, Baekyung (National Institute of Environmental Research)
Park, Woonji (Regional Infrastructure Engineering, Kangwon National University)
Yoon, Kwangsik (Department of Rural & Bio-Systems Engineering, Chonnam National University)
Choi, Dongho (Department of Rural & Bio-Systems Engineering, Chonnam National University)
Kim, Yongseok (Department of Rural &)
Ryu, Jichul (Bio-Systems Engineering, Chonnam National University)
Choi, Joongdae (National Institute of Environmental Research)
Publication Information
Journal of Korean Society on Water Environment / v.32, no.2, 2016 , pp. 183-190 More about this Journal
Abstract
Monitored data (rainfall runoff and water quality) from 4 different paddy sites over 3 years were compared to analyze the effect of irrigation water management on irrigation supply and rainfall runoff quality in Korea. The system of rice intensification water management was adopted at one site (SRI) while the conventional water management method was used for rice culture at the other three sites (CT, SD and HD). The soil texture at SRI, CT and SD was sandy loam while that at HD was silt loam. The average reduction of irrigation supply at SRI compared with CT, SD and HD during the 3 years studied was 49%, 51% and 55%, respectively. The average event mean concentration (EMC) at SRI compared with that at CT, SD and HD was decreased by 35% (BOD), 44% (COD), 47% (SS), 19% (TN) and 38% (TP). The correlation between rainfall runoff and the measured non-point source (NPS) pollutants was very good in general. The comparison revealed that SRI water management significantly reduced both irrigation supply and EMC in rainfall runoff. Paddy NPS pollution was closely related to factors that induce runoff such as rainfall and irrigation supply. It was concluded that SRI management could be an effective and practical option to cope with both water shortage due to climate change and water quality improvement in rural watersheds. However, further studies are recommended in large irrigation districts for use in the development and implementation of NPS pollution policies since the data was collected from field sized paddies.
Keywords
EMCs; Irrigation water reduction; NPS pollution; System of rice intensification; SRI;
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Times Cited By KSCI : 8  (Citation Analysis)
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