Pollution in Masan Bay, a matter of concern in South Korea

Lee, Chan-Won; Min, Byung‐Yoon

doi:10.1016/0025-326x(90)90338-9

Cited by 27 publications

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“…Temperature and salinity showed significant differences between surface and bottom waters in summer (Figure 2), indicating strong stratification in this season. In addition, water in inner Masan Bay had a longer residence time compared to that in other areas because of the narrow channel opening to the ocean (Lee and Min, 1990;Lee et al, 1998). The plentiful nutrients, high water stability, and longer residence time may encourage phytoplankton growth, and as a result, extremely high Chl-a concentrations (.50 mg L 21 ) were found in inner Masan Bay.…”

Section: Spatial and Temporal Variations In Nutrientsmentioning

confidence: 96%

“…Many studies have been conducted in Masan Bay to improve our understanding of the behavior of pollutants under different environmental conditions and their impacts on coastal ecosystems (Cho and Chae, 1998;Kwon, Lee, and Ahn, 2001;Lee and Han, 2007;Lee and Kim, 2008;Lee and Min, 1990;Lee et al, 1998). However, relatively few studies have been based on longterm environmental monitoring of water quality in Masan Bay.…”

Section: Introductionmentioning

confidence: 98%

“…Starting in the 1960s, large amounts of domestic sewage (97,990 m 3 d 21 ) and industrial waste (76,130 m 3 d 21 ) were discharged without treatment into inner Masan Bay through several streams (Lee and Min, 1990). As a result, Masan Bay rapidly became eutrophic, resulting in largescale algal blooms in the early 1980s.…”

Section: Introductionmentioning

confidence: 99%

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Spatial and Temporal Trends in Water Quality in Response to Sewage Discharge in Masan and Hangam Bays, Korea

Jang¹,

Shin²,

Chang³

et al. 2011

Journal of Coastal Research

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JANG, P.G.; SHIN, K.; CHANG, M., and KIM, D., 2011. Spatial and temporal trends in water quality in response to sewage discharge in Masan and Hangam bays, Korea. Journal of Coastal Research, 27(6A), 144-155. West Palm Beach (Florida), ISSN 0749-0208.This study investigated the spatial and seasonal variations of nutrients, chlorophyll-a (Chl-a), particulate organic carbon, and dissolved oxygen at four stations around Masan Bay from February 2004 to February 2006. Nutrients showed large spatial and seasonal variations in the study area. Dissolved inorganic nitrogen and dissolved silicate concentrations were highest at inner Masan Bay, which was ascribed to the largest inputs of both nutrients from the lands among four stations. Dissolved inorganic phosphorus concentrations are highest at Hangam Bay, where a fertilizer plant caused serious soil pollution with the by-products of phosphate rocks. The extremely high Chl-a concentrations (.60 mg L 21 ) were observed at inner Masan Bay in July and attributed to the plentiful nutrients, high water stability, and longer residence time at this area during summer. Surface Chl-a concentrations displayed large seasonal variations at all stations, with high values in summer and low values in fall and winter. The lower Chl-a concentrations in fall and winter may be due to strong vertical mixing, which could transport phytoplankton below the euphotic depth, and as a result, constrained phytoplankton growth. Particulate organic carbon-to-Chl-a ratios varied from 59.8 to 121, with large spatial variation and small seasonal change. Hypoxia (,2 mg L 21 ) was observed at inner and outer Masan and Hangam bays during summer. Outer Masan Bay showed more severe hypoxia than inner Masan Bay in summer 2004 and 2005, which was probably because of the higher organic contents at the bottom sediments and deeper water depth. Despite construction of the Masan and Jinhae wastewater treatment plants, Masan and Hangam bays still received high loading of nutrients, and serious eutrophication was still observed at these bays.www.JCRonline.org ADDITIONAL INDEX WORDS: Nutrients, chlorophyll-a, particulate organic carbon, dissolved oxygen, hypoxia.

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Section: Spatial and Temporal Variations In Nutrientsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 98%

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Spatial and Temporal Trends in Water Quality in Response to Sewage Discharge in Masan and Hangam Bays, Korea

Jang¹,

Shin²,

Chang³

et al. 2011

Journal of Coastal Research

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“…Korean coastal regions are currently characterized as severely eutrophic areas and receive the largest terrestrial nitrogen (N) fluxes in the world (Bashkin et al, 2002;Howarth, 2008). Consequently, the frequency of massive algal blooms, such as "red tides, " has increased remarkably in Korean coastal regions, and is concentrated mostly along the southern coast, including JB and Gamak Bay (Lee and Min, 1990;Kim, 1997;Lee et al, 2013). These blooms make major contributions to the development of hypoxia in Korean coastal regions , leading to substantially enhanced biological oxygen consumption in water columns and sediments (Diaz, 2001).…”

Section: A Brief Overview Of Hypoxia In Korean Coastal Watersmentioning

confidence: 99%

Hypoxia in Korean Coastal Waters: A Case Study of the Natural Jinhae Bay and Artificial Shihwa Bay

et al. 2018

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Several coastal regions in Korea have suffered from hypoxia since the 1970s. We present the first review of Korean coastal hypoxia, focusing on its spatiotemporal variation, controlling factors, and effects on marine ecosystems. The review considers the two hotspots of the natural Jinhae Bay (JB) and artificial Shihwa Bay (SB), which are referred to as "Korean dead zones." The hypoxia in the JB is attributed to eutrophication due to domestic and land-used waste input and thermal stratification based on the naturally sluggish water circulation, whereas the hypoxia in the SB is due to eutrophication resulting from domestic, land-used, and industrial waste input and haline stratification as a consequence of the artificially created water stagnation. The bottom-water hypoxia and stratification has led to an imbalance in nitrogen:phosphorus ratio between surface and bottom waters. Hypoxia has also created undesirable benthic community changes in the both bays: (1) mass mortality of large species and recolonization with elevated abundances of opportunists in JB, and (2) decrease of the number of species, abundance, and diversity of benthic communities in SB. Therefore, it behooves us to pay attention to these environmental changes. This review will be helpful in determining the direction of future studies of Korean coastal hypoxia.

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“…Since the 1970s, intensive anthropogenic activities in this area have discharged domestic sewage and land-use wastes (3,800 and 3,600 kg d −1 , respectively) into several inflowing streams (Lee et al, 2018), loading them with massive nutrient contents (Lee and Min, 1990). These characteristics have resulted in serious environmental problems, such as eutrophication, hypoxia, and harmful algal blooms (red tides), leading to significant changes in coastal biogeochemical cycles and ecosystem structures (Lee and Lim, 2006;Moon et al, 2008;Kim D. et al, 2012;Lee et al, 2017;Lim et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Assessment of Satellite-Based Chlorophyll-a Algorithms in Eutrophic Korean Coastal Waters: Jinhae Bay Case Study

et al. 2019

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Jinhae Bay, one of the most important aquaculture areas in Korean coastal waters, has suffered from serious environmental problems due to intensive anthropogenic activities since the 1970s. Determining the response of coastal ecosystems in Korea to anthropogenic activities requires understanding the characteristics of chlorophyll-a concentration (Chl-a), and the high spatiotemporal resolution of the Geostationary Ocean Color Imager (GOCI) can aid these efforts. However, producing reliable satellite-based Chl-a estimates is challenging in optically complex coastal waters and the Chl-a estimation algorithms must be assessed regionally. Based on in situ Chl-a measurements collected in Jinhae Bay between 2011 and 2016, we evaluated GOCI-derived Chl-a estimates obtained using six ocean color Chl-a algorithms: two standard open ocean algorithms, one GOCI-standard algorithm, and three Tassan's algorithms regionally modified for Korean waters. All of the algorithms tended to underestimate high Chl-a values >0.9 mg m −3. The Yellow Sea Large Marine Ecosystem Ocean Color Project (YOC) algorithm, one of the modified Tassan's algorithms, provided the best fit to the in situ Chl-a measurements in Jinhae Bay (r = 0.51, p < 0.05), including appropriate representations of the spatial and temporal variation. Therefore, this algorithm can be considered a baseline approach for satellite-based long-term coastal monitoring systems in Jinhae Bay.

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Pollution in Masan Bay, a matter of concern in South Korea

Cited by 27 publications

References 0 publications

Spatial and Temporal Trends in Water Quality in Response to Sewage Discharge in Masan and Hangam Bays, Korea

Spatial and Temporal Trends in Water Quality in Response to Sewage Discharge in Masan and Hangam Bays, Korea

Hypoxia in Korean Coastal Waters: A Case Study of the Natural Jinhae Bay and Artificial Shihwa Bay

Assessment of Satellite-Based Chlorophyll-a Algorithms in Eutrophic Korean Coastal Waters: Jinhae Bay Case Study

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