• 한국환경과학회지
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• 제5권6호
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• pp.763-770
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• 1996

This study was performed to analyze the variation characteristics of writer qulity, correlation analysis of water quality data at each site and among the items of water Quality data. Water quality for analysis was monthly values of water temperature, pH, dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, suspended solid, 7-N and T-P checked in Daecheong Lake from January to December, 1995. It was analyzed variation of monthly water qulity was well from February to April, water temperature and COD seemed to have high correlationships at all sites. Regression equation is COD = 0.07 Water temperature +1.23 ($R^2$: 0.7616) . Results of the correlation analysis of water quality data showed that DO had high correlationships between site 1 and site 2, BOD did site 1 and 3, COD did site 1 and 2, 55 did site 5 and 6, 7-N did 2 and 3, 7-P did site 4 and 6. Regression equations for estimate of water quality data are as follows. $DO_1$=4.46+0.59 DO, ($R^2$=0.8868), $BOD_1$ = 0, 52+0.63 BOD3 ($R^2$ = 0.6390) $COD_2$ = 0.44+0.71 $COD_1$ ($R^2$ = 0.9183), SS6 = 0.89+0.7055.($R^2$ = 0.9155) $TN_3$ = 0.151 +0.886 $TN_2$ ($R^2$ = 0.9415), $TP_4$ = 0.004+5.758 $TP_6$ ($R^2$ = 0.9669)

• 상하수도학회지
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• 제29권6호
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• pp.625-632
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• 2015

The study of water environment system using a multivariate analysis in Changnyeong-Haman weir section has been conducted. The purpose of this study is to establish better understanding related water qualities in the Changnyeong-Haman weir section which can provide useful information. The data were consisted of water quality data and algae data including WT(water temperature), pH, DO, EC, COD, SS, T-N, $NH_3-N$, T-P, $PO_4-P$, Chl-a, TOC, d-silica, t-silica, Cyanobacteria, Diatoms, and Green algae. Statistical analyses used in this study were correlation analysis, principal components, and factor analysis. According to correlation analysis on COD and TOC, it revealed that the each value of correlation coefficient was 0.843. On the other result, a negative correlation was observed between diatoms and d-silica. Furthermore, the results of principal component analysis to the overall water quality were classified into four main factors with contribution rate 81.071%.

• 대한지리학회지
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• 제39권4호
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• pp.544-561
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• 2004

본 연구에서는 대관령 지역의 산림 및 농경지 소유역을 대상으로 주 1회의 유량 및 수질 조사를 실시하고 유량 및 수질 항목간의 상관관계를 분석하였다. 산림 소유역의 수질 변화는 적었던 반면 농경지 소유역에서는 화학비료 및 가축분 퇴비의 시용과 토양 유실로 인해 큰 폭의 수질 변화를 보였다. 용존산소량(DO)은 두 소유역에서 유량보다는 수온과 매우 뚜렷한 음의 상관관계를 나타냈다. 산림 소유역에서는 농경지 소유역에 비해 유량과 총질소(T-N) 및 $K^{+}$의 양의 상관관계가 뚜렷하게 나타났다. 반면, 농경지 소유역에서는 부유물질 총량(TSS), 총인(T-P) 및 화학적 산소요구량(COD)이 유량과 높은 상관성을 보였다. 대관령 지역에서는 도암호의 수질 오염, 특히 T-P의 증가가 심각하다는 점에 비추어 볼 때 수질 개선을 위해서는 농경지의 토양 유실 방지가 매우 중요하다. 특히 고랭지 채소 파종기에 해당하는 6월말에서 7월초에 이르는 기간의 토양 및 양분유실이 가장 심각한 것으로 나타나 이를 줄이기 위한 친환경농법 도입이 요구된다.

• 생태와환경
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• 제40권1호
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• pp.40-49
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• 2007

For effective watershed management, we must understand the complex and dynamic relationships of land uses and water quality. Despite numerous studies investigated the relationships between water quality and land use, there are increasing concerns on the geographical variation and lack of spatial integrations in previous studies. We investigated the relationships between land use and water quality characteristics in the Hwa-Sung estuarine reservoir watershed in Korea, which has spatially integrated land uses. The spatial variations of these relationships were also examined using zonal analysis. Water quality parameter were correlated positively with residential and forest and negatively with paddy and upland especially during base flow in the near buffer zone. During storm flow, correlation between land use and water quality was less apparent. Population and livestock density was correlated well to water quality parameter than just number of population and livestock. Relationships across zones, distinguished by distances from streams, were inconsistent and erratic, suggesting that the relationships between remote land uses and water quality may be affected more significantly by sub-basin characteristics than by the land use itself. The watersheds studied are mainly non-urban and their land uses are similar to typical watershed of other estuarine reservoirs, therefore, the correlation developed in this study might be helpful to manage other watersheds of estuarine reservoir. This methodology could be applied to other areas where the watershed characteristics are not significantly different from the study area.

• 한국환경과학회지
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• 제16권7호
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• pp.805-811
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• 2007

The purpose of this study was to invesitigate relationship between rainfall water quality and precipitation characteristic during the accumulated rainfall and rainless period. As the results of the analysis, rainfall water quality was improved in the rainfall duration. Correlation coefficients between rainwater quality and accumulated rainfall were $0.88{\sim}0.99$ except $Cl^-$. and that between rainless period and initial rainfall water quality were $0.62{\sim}0.75$. During the Asian dust event, concentration of the turbidity, BOD and electric conductivity were high. Therefore, it shows that the rainfall water quality is effected by atmospheric conditions before the rainfall events.

• 한국물환경학회지
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• 제28권3호
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• pp.394-400
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• 2012

We drew the stage-discharge relations of Byeokgye Stream, located in Yangpyeong-gun, Gyeonggi-do, and analysed the correlation between items of water pollutants by measuring the flow rate and water pollutants thirty-four times from April 2010 to December 2010. The results showed that it tended to be low water season from April to June and from October and December, while tending to be water season from July to September. The average flow rate was $2.137\;m^3/sec:\;0.464\;m^3/sec$ in low water season and $13.970\;m^3/sec$ in high water season. The stage-discharge curve thereon was $Q=40.107{\times}(h-1.200)^{2.877}$. As to the correlations, the correlation between the water temperature and COD was 0.58, and the correlations of SS with BOD and COD were 0.46 and 0.40 respectively. The correlation between SS and T-P was 0.73, showing higher than other items.

• 농업생명과학연구
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• 제44권5호
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• pp.117-127
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• 2010

본 연구에서는 낙동강 유역 오염총량관리대상지역의 수질오염물질간의 상관관계를 분석을 통해 하나의 오염 자료를 이용하여 다른 외부 오염자료의 평가에 대한 적용성을 검토하였다. 이를 위해 낙동강 유역의 수질관측 자료를 수집 정리하고 이를 이용하여 지점별 분석을 거쳐 관측지점을 군집화와 수질오염물질간의 상관관계를 분석하였다. 낙동강유역환경청에서 제공하는 수질관측지점별 pH, DO, BOD, COD, SS, TN, TP의 1989년부터 2009년까지의 월별 자료를 수집하여 정리하였으며 안동1, 안동2, 예천, 상주 등 12개 지점의 월별 BOD 측정 자료를 이용하여 오염측정지점 간에 상관분석을 실시하였고 군집분석을 수행한 결과 1군은 안동1, 안동2, 예천, 2군은 상주, 상주2, 상주3, 고령, 현풍, 합천, 남지, 3군은 구미와 달성으로 분류되었다. 수질오염물질간 상관분석에서는 오염총량관리대상지역으로 지정되는 구미 지점과 남지 지점에 대해 수질항목별 비강우시와 초기강우시 그리고 이틀간 10 mm이상의 강우시로 구분하여 상관관계를 분석하였다. 그 결과 비강우시와 초기강우시에 두 지점에서 일관성 있는 상관관계를 나타낸 항목은 없었으나 이틀간 강우량이 10 mm이상의 강우시에 구미 지점에서 COD-SS와 COD-TP에서 각각 0.735, 0.563로 높은 상관관계가 있었으며 남지 지점에서도 COD-SS와 COD-TP에서 0.888, 0.788로 높은 상관관계를 나타내 낙동강 유역에서의 수질항목별 상관관계에서 앞서 연구된 새만금 하구 담수호로 유입되는 하천수의 수질항목별 상관관계 분석과 유사한 경향을 보였다.

• 한국물환경학회지
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• 제28권1호
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• pp.102-108
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• 2012

This study has performed comparative analysis on characteristics of reservoirs in their use through correlation analysis on seasonal variation of water quality factors in agricultural reservoirs and multipurpose dams. Agricultural reservoirs show the high relationship between Chl-a and other water quality factors while the correlation among COD, BOD, and SS is strong in multipurpose dams. Agricultural reservoirs have the high relationship between various water quality factors in season such as Chl-a and pH ($R^{2}=0.294$) in Spring, pH and water temperature ($R^{2}=0.246$) in Summer, and Chl-a and BOD ($R^{2}=0.435$) in Fall, and between COD and BOD ($R^{2}=0.370$) in Winter, respectively, for Sapgyo reservoir while Chl-a and T-P ($R^{2}=0.739$) in Spring, T-P and SS ($R^{2}=0.876$) in Summer, and Chl-a and SS ($R^{2}=0.600$) in Fall, and between COD and SS ($R^{2}=0.998$) in Winter, respectively, for Seokmun reservoir. Boryeong dam has the strong relationship between T-P and SS ($R^{2}=0.511$) in Spring while the relation between COD and SS is high in other seasons with the values of $R^{2}$ of 0.362, 0.665, and 0.500 in Summer, Fall, and winter, respectively. The first and second water quality factors in relationship are COD and BOD in Sapgyo and Seokmun reservoirs, which is similar to the characteristics in Winter for multipurpose dams. Chl-a has no relationship with other water quality factors in Boryeong dam in operation for both flood control and low water regulation purposes. The result of this research is expected to provide contributions to the seasonal water quality control and analysis on characteristics for each reservoir by monitoring.

• Current Research on Agriculture and Life Sciences
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• 제24권
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• pp.49-53
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• 2006

The objective of this study was to present regression equations between reservoir water quality and land use types of the watersheds. In order to derive regression equations, a multiple linear regression analysis was used using observed data from 88 reservoirs in the Kyungpook Provcince. The measured values of BOD, COD, T-N, and T-P were correlated with the areas of land use types. 23 regression equations were obtained for all the water quality items and watershed sizes. The results showed that 2 regression equations have the multiple correlation coefficient(MCC) above 0.90, 10 regression equations have the MCC values from 0.70 to 0.90, 9 equations have the MCC from 0.40 to 0.70, and 2 equations have the MCC from 0.20 to 0.40. The results of this study can be used to estimate reservoir water quality simply and quickly in the planning phase.

• 한국농공학회:학술대회논문집
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• 한국농공학회 1998년도 학술발표회 발표논문집
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• pp.500-507
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• 1998

The measures for water quality improvement have been planned to introduce for several reservoirs which were badly polluted among the sites included in the Network of Agricultural Water Quality Survey (NAWQS). Considering conditions of circumstances around reservoirs, self-purification systems such as natural ecosystem, oxidation ponds with plants, grassed waterways, weirs, and manmade plant-islands are taking into account enhancing to trap nutrients in waters running off from agricultural lands. The Pollutant Run off Ratios were analysed to predict the effects of water quality improvement for self-purification systems. The cost of water quality improvement was evaluated. The correlation equation between cost and irrigation area showing high correlation coefficient was derived.