Water quality issues in the Nakdong River Basin in the Republic of Korea

Chun, Ki-Hwan; Chang, R.W.; Williams, Gustavious P.; Chang, Young-Soo; Tomasko, David L.; LaGory, Kirk E.; Ditmars, J.D.; Chun, Hee Dong; Lee, B. K.

doi:10.1007/s100220000024

Cited by 24 publications

(9 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The conspicuous variations of parameters are mainly due to precipitation and slightly due to agricultural activities and ND not detected seawater intrusion. Apart from this, there are textile/ dyeing industries around the Nakdong River, which secretly throw fabric scraps and chemicals into the river (Chun et al 2001;Alvarez-Mieles et al 2013).…”

Section: Autocorrelation and Spectral Densitymentioning

confidence: 99%

An assessment of selected hydrochemical parameter trend of the Nakdong River water in South Korea, using time series analyses and PCA

Chung

Senapathi

Park

et al. 2014

Environ Monit Assess

View full text Add to dashboard Cite

Time series analyses (autocorrelation, spectral density, and cross-correlation) and principal component analysis (PCA) were used to understand the characteristics of the selected hydrochemical parameters pH, turbidity, alkalinity, Cl, hardness, total dissolved solids (TDS), and metals Fe and Mn in the Nakdong River, South Korea. Autocorrelation and spectral density for pH, alkalinity, hardness, and Cl were very similar to TDS, whereas Fe, Mn, and turbidity showed different trends from TDS. Cross-correlograms of pH, alkalinity, hardness, and Cl versus TDS were very similar to each other. Those of Fe and turbidity represented the opposite relations with other components. Cross-correlation coefficients had the highest values at zero lag, indicating that pH, alkalinity, hardness, and Cl are controlling factors for TDS. On the other hand, Fe and turbidity showed the highest values at 6-month lag and Mn at a month lag. PCA indicated that TDS had very close relation with hardness, pH, and Cl and very small relation with Mn. Turbidity and Fe had relatively opposite relations with TDS. It was concluded that the geostatistical methods were very useful for evaluating the hydrochemical characteristics of the Nakdong River water in South Korea.

show abstract

Section: Autocorrelation and Spectral Densitymentioning

confidence: 99%

An assessment of selected hydrochemical parameter trend of the Nakdong River water in South Korea, using time series analyses and PCA

Chung

Senapathi

Park

et al. 2014

Environ Monit Assess

View full text Add to dashboard Cite

show abstract

“…Since the 1990s, the Korean government has implemented strategies to reduce cyanobacterial blooms in order to improve the water quality of the Nakdong River. These methods include installment of wastewater treatment facilities and pollution management (Chun et al, 1999;Jung et al, 2008;Lee et al, 2010). These efforts were then applied to other major rivers in Korea, and eventually, the Korean government initiated the Total Maximum Daily Load program.…”

Section: Water Quality Management Strategies In a Regulated Rivermentioning

confidence: 99%

“…Most studies on cyanobacterial blooms in the Nakdong River have focused on the severe cyanobacterial bloom of the 1990s (Jeong et al, 2003a;Kim et al, 2007). Owing to adequate rainfall and water quality improvements, these blooms diminished in the 2000s (Chun et al, 1999;Lee et al, 2010), but have reappeared in the last 5 years. The hydrological changes and rainfall variability in the Nakdong River due to global climate change have been hypothesized to promote cyanobacterial bloom outbreaks (Seo et al, 2012;Hur et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Limnological assessment of the meteo-hydrological and physicochemical factors for summer cyanobacterial blooms in a regulated river system

Hong

Kim

et al. 2016

Ann. Limnol. - Int. J. Lim.

View full text Add to dashboard Cite

This study aimed to explain how the changes in certain hydrological, meteorological and physicochemical factors influence the cell density of the cyanobacteria Microcystis aeruginosa in the Nakdong River. Occurrence patterns of M. aeruginosa were analyzed between 1993 and 2010 (N = 96) using a selforganizing map. The cell density of M. aeruginosa was sensitive to certain meteorological, hydrological and physicochemical factors. In addition, our clustering analysis results identified specific limnological features under different environmental conditions. Cluster 1 suggested that high rainfall and increased river flow, dam discharge, total phosphorous and phosphate concentrations were associated with low M. aeruginosa cell density (June-July; monsoon season). However, cluster 2 suggested low irradiance since water temperature decreases with irradiation time, and thus low M. aeruginosa cell density (April-June and after November). Finally, cluster 3 was indicative of high water temperature and irradiance, increased irradiation time, low phosphate and nitrate concentrations, and high M. aeruginosa cell density (August, after the monsoon season). Taken together, these results suggest that rainfall, river flow, water temperature and nutrient concentration (i.e., phosphates and nitrates) were the primary factors that affected cyanobacterial bloom occurrence in the Nakdong River. M. aeruginosa blooms can be suppressed by employing an integrated water resource management program that accommodates meteo-hydrological factors along with the effective control of exogenous nutrient sources.

show abstract

“…In South Korea, reservoirs were constructed for irrigation, water supply and flooding control. Freshwater for water supply (mountain reservoirs and Nakdong river system) has been very important for social economy (Chun et al, 2001). Bach et al (2009) developed the study about long-term paradigm analyses of chlorophyll a and water quality in reservoir systems of Korea.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Relationships between Chlorophyll a and Water Quality in South Korea Reservoirs Relating Summer Monsoon

Dung¹

2020

VNJHM

View full text Add to dashboard Cite

Variations of chlorophyll a in relation with freshwater quality in Korean reservoirs were investigated during the period of 1992-2006. This study compared assessed total nitrogen (TN), total phosphorus (TP), total suspended solids (TSS), Secchi depth (SD) and phytoplankton biomass (Chlorophyll a (Chl)) relating to pre-monsoon, monsoon and post-monsoon in South Korea reservoirs. Linear relationships were observed between log-transformed Chl and logtransformed TN, TP, TSS, SD and applied for all study sites to examine relationship of these factors in South Korea reservoirs. The results demonstrated that phytoplankton biomass responded to nitrogen and phosphorus enrichment and was also differently and remarkably related to TSS, SD in Korean reservoirs during pre-monsoon, monsoon and post-monsoon.

show abstract

Water quality issues in the Nakdong River Basin in the Republic of Korea

Cited by 24 publications

References 2 publications

An assessment of selected hydrochemical parameter trend of the Nakdong River water in South Korea, using time series analyses and PCA

An assessment of selected hydrochemical parameter trend of the Nakdong River water in South Korea, using time series analyses and PCA

Limnological assessment of the meteo-hydrological and physicochemical factors for summer cyanobacterial blooms in a regulated river system

Assessment of Relationships between Chlorophyll a and Water Quality in South Korea Reservoirs Relating Summer Monsoon

Contact Info

Product

Resources

About