신천의 부착규조 군집 장기 변화 및 생물학적 수질평가 = Long-term Changes in the Epilithic Diatom Community and Biological Water Quality Assessment of the Sincheon Stream

다국어 초록 (Multilingual Abstract)

The inflow of treated wastewater and Nakdong River drift water affects the water
quality of the Sincheon Stream. This study examined the impact of these inflows on
water quality and epilithic diatom communities at five selected sites within the
stream. Biological indices such as DAIpo (Watanabe et al., 2005) and TDI (NIER, 2017)
were employed to evaluate water quality.
The results indicated that the inflow of treated wastewater decreased the hydrogen
ion concentration (pH) while increasing Electrical Conductivity (EC) and nutrient
levels (NO3¯). In contrast, the impact of Nakdong River drift water was minimal.
During the survey period, a total of 98 diatom species were identified in the
Sincheon Stream, with the genus Navicula being the most abundant.
In the DAIpo assessment, the inflow of Nakdong River drift water increased the
values, while the effect of treated wastewater was negligible. For TDI, Nakdong River
drift water caused a slight increase in values, but the impact was still minimal;
however, treated wastewater resulted in a decrease in TDI values.
This suggests that the nutrients present in the treated wastewater have negatively
affected water quality.
A comparison of DAIpo and TDI values from 2007 and 2014 indicated an improvement in
water quality over time. This study was conducted within one year of the release of
Nakdong River drift water, and additional research is needed to understand the
long-term impacts of these inflows.

목차 (Table of Contents)

• 서 론 1
• 재료 및 방법 3
• 1. 조사지점 선정 3
• 2. 이화학적 환경요인 분석 6
• 3. 시료의 채집과 종 동정 6
• 4. 군집지수 7
• 4.1. 우점도 지수(Dominance Index: D) 7
• 4.2. 다양도 지수(Diversity Index: H') 7
• 4.3. 풍부도 지수(Richness Index: RI) 8
• 4.4. 균등도 지수(Evenness Index: J') 8
• 5. DAIpo와 TDI를 이용한 생물학적 수질평가 9
• 5.1. DAIpo 9
• 5.2. TDI 10
• 결과 및 고찰 11
• 1. 이화학적 환경요인 11
• 2. 부착규조 군집분석 14
• 2.1. 종조성 14
• 2.2. 우점종 18
• 2.3. 군집지수 22
• 2.4. DAIpo 24
• 2.5. TDI 27
• 3. 신천 수질의 장기변화 30
• 참 고 문 헌 34
• Abstract 39
• Appendix 40