With the concerns of global climate change, the significant changes in rainfall patterns have aggravated the occurrence of pollutants from agricultural uplands. Heavy and intensive rainfalls have rinsed a variety of pollutants off the land, sending them into the neighboring water environments which further causes water pollution problems. Recently, the application of PAM(Polyacrylamide) in agricultural lands has gotten much attention for soil conditioning. Therefore, this study aimed to develop the automatic control system applying the chemical flocculant, liquid PAM in order to flocculate the suspended solids and deposit at the bottom of farmland water channel, so eventually minimize the amount of non-point pollutants discharged into receiving water. The optimum feed rate for liquid PAM was calculated through the experiment in artificial water channel and applied to the control system. As the results of the performance test of the automatic turbid water control system installed in the sloped field, the range of turbidity reduction rate was 25 to 33% with the average turbidity of 292 to 498 NTU in water channel.

ABSTRACT
 1. 서론
 2. 연구방법
  2.1 PAM 공급량 제어를 위한 인공수로 시험
  2.2 경사농경지 현장시험
 3. 결과 및 고찰
  3.1 PAM 공급량 제어를 위한 인공수로 시험
  3.2 현장시험결과
 4. 결론
 후기
 References

• 김승희(Protected Horticulture Research Institute, National Institute of Horticultural and Herbal Science, RDA) | Seoung-Hee Kim
• 이상봉(Rural Development Administration) | Sang-Bong Lee
• 김민영(Department of Agricultural Engineering of National Academy of Agricultural Science, RDA) | Min-Young Kim Corresponding Author