Study on Change of Algae Occurrence Before & After Gangcheon and Ipoh Weir Construction at Namhan River

Abstract

This study was carried out to verify change and relationship between the concentration of chlorophyll-a and environmental factors including weather, water quality and discharge at before & after Gangcheon and Ipoh weir construction at Namhan river, based on the weather and water quality data provided by the measuring network. We classified the period of before & after weir construction by the cluster analysis with Ward's method, and also through the correlation analysis between the concentration of chlorophyll-a and environmental factors, the influence factors related with algae occurrence(Chlorophyll-a) were analyzed. The result by cluster analysis based on data of the total 12 factors (water temperature, rainfall, daylight, pH, DO, BOD, COD, T-N, NH 3 -N, NO 3 -N, T-P, PO 4 -P) from 2005 to 2015 indicated a clear classification into two periods, before

Assessing the Impact of Weirs on Water Quality and Phytoplankton Dynamics in the South Han River: A Two-Year Study

“…Latitude N 37 Note(s): * Chae et al [38], ** 1 Distance from the mainstream of Seom River to KCW, 2 Distance between KCW and YJW, 3 Distance between YJW and IPW.…”