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DOI : , Vol.12, No.1, 83 ~ 97, 2004
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| Title |
| Investigation of Inflow and Infiltration of Combined and Separated Sewer System at Gwangju City |
| 송영일 Song Yeong Il , 김현중 Kim Hyeon Jung , 임항선 Im Hang Seon , 이성기 Lee Seong Gi |
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| Abstract |
| Flow and water quality was investigated to the separated and combined sewer pipeline for calculation of infiltration and inflow in the Gwangju city and the result is as follows. Flow change appeared changelessly in Pungam site by separated sewer system. Rainfall augmentation by inflow was seen at rainfall from Sangmu site. This is considered for cause of wrong conjunction and construction the sewer pineline. Watched that influent of continuous infiltration/inflow is the combined system in Songam site. Specially, sudden flow rise was seen at rainfall. The high occurrence amount was seen after cooking time of morning and evening on flow change by time from each investigation site. High concentration was seen most for cooking time of morning and evening on concentration by time. If time passes while BOD concentration by initial rain appeared very high at rainfall, tendency that concentration becomes low slowly was seen. Ratio of infiltration/inflow appeared low in Sangum, Pungam, Bonchon site by water consumption estimation, but high ratio was seen by 53.15%, 60.19% in Songam site. Average, lowest flow and water quality evaluation method for the infiltration/ inflow quantity seemed little except Songam site. Despite Sangmu, Pungam, Bonchon site is lowest low flow in work lowest flow evaluation method, because lowest BOD concentration is high, is considered unreasonable application of infiltration/ inflow quantity. Is considered that it is desirable to use method of average-1 in Sangmu, Pungam site in estimation of infiltrationhflow at dry season of each investigation point. Is considered that it is right to calculate infiltration/inflow because Bonchon, Songam site uses average-2 methods. Infiltration/inflow of collected area appeared high in large area as rainy season. But, collected area appeared low at small agency. |
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| Key Words |
| Infiltration/Inflow, Separated sewer pipeline, Combined sewer pipeline |
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