곡교천 수계의 수질오염 현황에 관한 연구

A study on Water pollution in Gogeyochun Stream Basin

This study made check of the water pollution status and pollution source at some points around A-City local rivers such as 3rd point of main flow of Gokkyo River, 4th Point of a branch stream of Anyang River and 1st point of branch stream of Sapkyo Lake, analyzed the loading of pollution materials through calculation of loading of pollution and studied the loading of pollution in A-City. The water quality test for each rivers showed the average BOD5 for Eumbong River was the best as 2.55m g//，T-N 1.05mg//, T-P 0.43mg/1 , which means the second class quality and the water class of the rest rivers except the main branch of Gokgyo and Onyang River mostly belonged to 4th 〜 6th class. The test by flow speed-size method showed that the main branch of Gokgyo had increasingly high values influenced by branch streams but there was decrease of water flux in the downstream of Gokgyo River due to installation of water storage appratus and agricultural use.