Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Analysis of Nutrient Load Balance in the Reservoir Irrigated Paddy Block

저수지 관개 광역 논의 영양물질 수지 분석

  • 송정헌 (서울대학교 농업생명과학대학 생태조경.지역시스템공학부) ;
  • 강문성 (서울대학교 농업생명과학대학 조경.지역시스템공학부, 농업생명과학연구원) ;
  • 송인홍 (서울대학교 농업생명과학연구원) ;
  • 황순호 (서울대학교 농업생명과학대학 생태조경.지역시스템공학부) ;
  • 박지훈 (서울대학교 농업생명과학대학 생태조경.지역시스템공학부) ;
  • 전상민 (서울대학교 농업생명과학대학 생태조경.지역시스템공학부) ;
  • 김계웅 (서울대학교 농업생명과학대학 생태조경.지역시스템공학부) ;
  • 장정렬 (한국농어촌공사 농어촌연구원)
  • Received : 2013.11.11
  • Accepted : 2013.11.18
  • Published : 2013.11.30
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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

References

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