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Related Experiment Videos

Multipond system: a sustainable way to control diffuse phosphorus pollution.

C Yin1, B Shan

  • 1SKLEAC, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China. cqyin@mail.rcees.ac.cn

Ambio
|January 5, 2002
PubMed
Summary

Multipond systems, a traditional Chinese agricultural practice, effectively control diffuse pollution by managing water, sediment, and phosphorus runoff. This sustainable approach reduces nutrient discharge, mitigating lake eutrophication and aiding nutrient recycling.

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Area of Science:

  • Environmental Science
  • Agricultural Engineering
  • Water Resource Management

Background:

  • Diffuse pollution from agriculture is a primary driver of lake eutrophication.
  • Traditional farming practices often contribute to nutrient and sediment runoff.
  • Multipond systems offer a potential solution for managing agricultural non-point source pollution.

Purpose of the Study:

  • To evaluate the effectiveness of multipond systems in controlling diffuse pollution from agricultural land.
  • To quantify the capacity of multipond systems for water storage and pollutant retention.
  • To assess the role of multipond systems in nutrient recycling and reducing downstream lake pollution.

Main Methods:

  • Long-term research conducted in an experimental watershed (Liuchahe, 691.6 ha).

Related Experiment Videos

  • Monitoring of water export, suspended matter, and phosphorus loads.
  • Analysis of sediment and phosphorus retention within the multipond system.
  • Evaluation of irrigation as a phosphorus removal and recycling mechanism.

    • Main Results:

    • Multipond systems demonstrated significant control over diffuse pollution.
    • Substantial retention of sediments (14.38 x 10^6 kg yr^-1) and phosphorus (7016 kg yr^-1) was observed.
    • Reduced runoff velocity was a key factor in pollutant trapping.
    • Irrigation facilitated phosphorus recycling and removal.

    Conclusions:

    • Multipond systems are an effective and sustainable method for diffuse pollution control in agricultural areas.
    • These systems significantly reduce the export of water, suspended matter, and phosphorus.
    • The integration of multipond systems promotes nutrient recycling and mitigates lake eutrophication.