대구시 금호강유역 하상퇴적물의 이화학적 환경요인의 동태 = Dynamics of Physico-Chemical Environments on the Stream Sediment in Keumho River , Taegu City

다국어 초록 (Multilingual Abstract)

This study was carried out to investigate the correlation of each elements, depth, and contents of physico-chemical elefnents of sediments of stream along 7.5km of lower region in Keumho river. The color of sediments of stream varied black to light gray, and black clay had a bad smell. It means that the color and odor correlated to the content of black clay. pH ranged 4.16-7.89, and increased lower region than upper region and channel than riverside. Organic matter showed a high value in black clay regardless of sites, lower region in channel and upper region in riverside respectively. In channel, COD increased in the lower sediment of stream, and showed little differences except top layer of upper region in riverside. Total-P increased to down stream regardless of river basin, and Total-N showed the high value and in the upper and lower region differences in riverside. In upper region, a little differences showed between elements on sediments of stream, but high values of organic matter and COD were obtained on the riverside. It showed that values of sediment of channel had 2-3 times that of riverside in middle region, and channel sediment showed 2 times of riverside on the organic matter, sulfide and COD in lower region respectively. Changes of contents on the depth showed a high value on the top layer but not consistent, and increased in sediments bearing much black clay. The content of physico-chemical element of sediment showed linear increase by organic matter and COD.