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Correlation between the Water Cycle and the Water Quality Change in the Area of Paddy Fields

Research Project

Project/Area Number 04660250
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 農業土木
Research InstitutionNIIGATA UNIVERSITY

Principal Investigator

TOYOTA Masaru  Niigata Univ., Fac.of Agric., Professor, 農学部, 教授 (50018785)

Co-Investigator(Kenkyū-buntansha) MISAWA Shinichi  Niigata Univ., Fac.of Agric., Associate Prof., 農学部, 助教授 (30018791)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1993: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1992: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsWater cycle / Water management / Water reuse / Effluent load / Water quality / 水質負荷
Research Abstract

From both the 1992 and the 1993 investigations, the following results were obtained :
1. Through the use of water cycling, the complex tank model with water reuse included could indicate the return rate of irrigation water.
2. The concepts of paddy water purification and the water pollution mechanisms were understood. When the irrigation water is polluted, then the paddy water purification mechanism works very well. However, when the irrigation water is clean, then the concentration of the drainage water is increased, proving what is known as the buffer effect of paddy fields.
3. Water use was very effective in the farm-pond area using pumped irrigation water, moreover, the water cycling area using implying drainage channels supply reuse water was much more effective.
4.The area with plenty of irrigation water has less labor requirement and the water quality concentrations are lower, but the loads are large and so the drainage output loads are very large. Through the use of water cycling methods, the concentration of irrigation water increases, but with good water management methods it is possible to distribute the irrigation water more uniformly among the users, with less effluent loads and reduced environmental effects.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] Giveson ZULU: "EFFECTS OF WATER REUSE AND WATER RECYCLING ON THE IRRIGATION WATER MANAGEMENT AND THE ENVIRONMENT" Proceedings of the International Conference on Environmentally Sound Water Resources Utilization. I. 200-207 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Giveson ZULU: "Effect of Water Reuse and Water Recycling on the Irrigation Water Management and the Environment" Proceedings of the International Conference on Environmentally Sound Water Resources Utilization. Vol.I. 200-207 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Giveson ZULU.: "EFFECTS OF WATER REUSE AND WATER RECYCLING ON THE IRRIGATION WATER MANAGEMENT AND THE ENVIRONMENT" Proceedings of the International Conference on Environmentally Sound Water Resources Utilization. 1. 200-207 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] キブソン・ズル 豊田 勝 三沢 真一: "水田用水の反復利用区域における水管理の分析" 農業土木学会京都支部講演要旨集. 49. 18-19 (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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