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http://dx.doi.org/10.4491/KSEE.2012.34.6.421

Water Quality of a Rural Stream, the Hwapocheon Stream, and Its Analysis of Influence Factors  

Ahn, Chang Hyuk (Environment Research Division, Korea Institute of Construction Technology)
Kwon, Jae Hyeong (Environment Research Division, Korea Institute of Construction Technology)
Joo, Jin Chul (Environment Research Division, Korea Institute of Construction Technology)
Song, Ho Myeon (Environment Research Division, Korea Institute of Construction Technology)
Joh, Gyeongie (Department of Environmental Science and Engineering, Inje University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.34, no.6, 2012 , pp. 421-429 More about this Journal
Abstract
This study was aimed to analyze the water quality characteristics of the Hwapocheon Stream and to be utilized in the further related research. Water in the upper stream became a dammed pool due to the existence of 14 weirs, and pollutants such as both sewage and irrigation water were introduced into the mainstream passing through farming settlements and agricultural land. For these reasons, filamentous cyanobacteria (Oscillatoria sp.) bloomed at the bottom of the dammed pool. Also in the midstream and downstream, tributaries with high pollutant concentrations [e.g., Comocheon (T3) and Yongdeokcheon (T8)] were inflowed, and had a negative impact on water quality of the mainstream, especially nitrogen and phosphorus. In the Hwapocheon Stream, dissolved oxygen (DO) decreased, and suspended solid (SS) increased toward the downstream. The result showed that hydraulic retention time, SS, COD, and concentration of $NH_4{^+}$ were important water quality factors of the Hwapocheon Stream. The high concentration of benthic organic matter and rich in attached algae in the core of Hwapo-wetland were expected to give impact on the water quality of the mainstream. In the spatial manner, water quality showed increasing trend in the weir zone, and it was constant or decreased trend in wetland. In the seasonal manner, the nutrient concentrations were high in the winter dry season, however, the organic matter concentrations were high in spring and summer. Generally, the concentrations of phytoplankton value were $40{\mu}g\;chl-{\alpha}/L$ or less in all reaches except for the high concentrations in the weir and wetland area in June.
Keywords
Weir; Hwapo-Wetland; DO; SS; Benthic Organic Matter; Correlation Between Water Quality;
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Times Cited By KSCI : 1  (Citation Analysis)
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