• 한국물환경학회지
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• 제36권2호
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• pp.125-136
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• 2020

In this study, we identified the major pollution-zones of the mainstream and its tributaries of Gongneung stream and investigated their pollution sources based on water quality, flowrate and pollution-load data of the stream having the characteristics of the urban-rural complex to examine the effect of the tributaries on the water quality changes in the mainstream. The water quality and flowrate data were collected for 10 months (2018 ~ 2019) at 3 points of mainstream and ten tributaries. Water quality index (WQI), load duration curve (LDC), discharge load density (DLD)and delivery ratios for each tributary were obtained so as to investigate the pollution characteristics and some of the information visualized on GIS. The main pollution-zone in the Gongneung stream was in the middle and lower streams, and the tributaries that may affect the pollution of the area were JS, JY, SL and SM. JS and SL had low WQI levels (34.7/37.5) and DLD (kg/d/㎢) of BOD and T-P were relatively high in JY (99.2/6.00) and SL (60.0/2.07). BOD and T-P delivery ratios in JS were high (0.94/0.83), suggesting that JS had significant influence on the water quality of the main pollution-zone in the Gongneung stream. Meanwhile, SM having a high T-P delivery ratio (0.97) was found to be more affected by the non-point source due to the higher LDC excess rate (%) in the low flow compared to high flow. This study provides basic data on the water quality and pollution characteristics of the Gongneung stream, and the analysis results are expected to be used as examples for identifying the main pollution-zone and tributaries of stream and their pollution sources.

• 한국수자원학회논문집
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• 제42권5호
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• pp.425-432
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• 2009

공릉2보는 농업용수의 공급을 위하여 1970년대에 설치되었다. 그러나 인근 지역의 토지 이용의 변화로 용도를 다하여 사용되지 않고 방치되어 있었다. 공릉2보는 높이 1.5 m의 소형 보 이며, 공릉천의 하상재료는 가는 모래에서 가는 자갈로 구성되어있다. 지자체와 지역 주민들과의 협의를 통하여 공릉2보는 2006년 4월 14일 완전히 철거되었다. 본 논문에서는 공릉2보 철거에 따른 하천형태학적인 변화를 조사하기 위한 연구를 수행하였다. 보 철거 전 후의 하상재료의 입도분포, 종단 하상고, 그리고 단면형의 변화가 고찰되었다. 보를 포함한 1 km 구간에서 순 퇴적량이 산정되었으며, 결과로부터 평형하상을 유도하는 유사이동 과정이 초반 45일동안 무척 빠르게 진행되었음을 보였다.