A multiobjective model for non-point source pollution control for an off-stream reservoir catchment

Jehng-Jung Kao*, W. J. Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Phosphorus loads from agricultural non-point source pollution (NPSP) significantly degrade reservoir water quality, making adequate control of agricultural NPSP necessary for improving the water quality. Controlling NPSP is generally accomplished using various Best Management Practices (BMPs). The present study applies the Agricultural Non-Point Source Pollution (AGNPS) model to simulate NPSP loading and BMP efficiencies and establishes an enhanced multiobjective mixed-integer programming model for NPSP control strategy analyses based on these results. Cost, phosphorus load, sediment load and equity are the four major objectives considered. A case study for the Posan reservoir is presented. Four commonly proposed and applicable BMPs are chosen. Non-inferior solutions obtained using the constraint method and trade-off relationships among different control objectives are described and discussed. Compared with a previously proposed fertilizer control model, results show that the model established herein is more cost-effective and achieves better phosphorus and sediment loading reduction and equity goals. Furthermore, the current model is expected to facilitate decision-making analysis for development of an appropriate cost-sharing program to encourage adoption of appropriate BMPs by farmers.

Original languageEnglish
Pages (from-to)177-183
Number of pages7
JournalWater Science and Technology
Issue number10
StatePublished - 1 Dec 2003


  • Best management practices
  • Environmental systems analysis
  • Multiobjective model
  • Non-point source pollution
  • Optimization

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