| Title |
Estimation of mass balance and self-purification in the Osan Stream having the typical characteristics of urban stream |
| Authors |
홍일 ( Hong Il ) ; 최이송 ( Choe I Song ) ; 오종민 ( O Jong Min ) |
| Keywords |
Self-purification; Mass balance; Sedimentation; Matter cycle; Microorganism |
| Abstract |
The pollutants in the stream are removed by its biological, chemical and physical self-purification. Therefore, it is required that self-purification in the stream is correctly estimated in the field for the effective management of stream water quality. In this study, we estimated mass balance and self-purification through various experiments in the Osan Stream, which is located in Kyunggi Do and shows the typical characteristics of urban stream. Based on the results, sedimentation in the Osan Stream was investigated as a major factor in the removal reactions of pollutants. Primary production by photosynthetic plankton in the Osan Stream corresponded to 12.6% for total organic matter, and degradation by microorganism did 4.8%. Although these values were lower than those in stagnated water`s such as lake`s and reservoir`s, if we consider that the hydraulic retention time of the Osan Stream is very short compared with those other bodies, they are high significant in estimating the origin of organic matters. Microorganisms attached on the various riverbed materials take an important role in consuming or producing organic matter, nutrients and DO in the stream. |