Export of Nitrogen by Lateral Seepage from Paddy Field in Sanjiang Plain
三江平原水田氮的侧渗输出研究

The present study aims to discuss the export mechanism for nonpoint source pollution of nitrogen from paddy field in Sanjiang Plain.Different scales of in-situ experiments were performed to study the concentrations of nitrogen,the intercepting ratio of bund to nitrogen,and the lateral seepage velocity during the export process of nitrogen in the field-bund-trench system.The annual export load of nitrogen was also quantified.The results showed that the width of near-trench bund affected the lateral seepage v...