Anthropogeny Bed and Radiometric Measurements Deposits of Surface Water Some Coastal Areas in Valley and Ardon Sadon

2015 ◽  
pp. 61-78
Keyword(s):  
Surface Water ◽  
Coastal Areas ◽  
Radiometric Measurements

Impacts of Climate and Land Use Change on Surface Water Content and Quality in Low-Lying Coastal Areas of Bangladesh

2021 ◽  
pp. 1-28
Author(s):  
Bishwajit Roy ◽  
Tiago Capela Lourenço ◽  
Filipe Lisboa ◽  
Gil Penha-Lopes ◽  
Filipe Duarte Santos
Keyword(s):  
Land Use ◽  
Surface Water ◽  
Land Use Change ◽  
Water Content ◽  
Coastal Areas

Seasonal variation of microplastics in seawater and zooplankton in Jiaozhou Bay, the Yellow Sea

2020 ◽  
Author(s):  
Xiaoxia Sun
Keyword(s):  
Seasonal Variation ◽  
Chemical Composition ◽  
Surface Water ◽  
Yellow Sea ◽  
Jiaozhou Bay ◽  
Coastal Areas ◽  
Average Concentration ◽  
The Yellow Sea ◽  
Plastic Pollution ◽  
Four Seasons

<p>Plastic pollution is a globally concerning issue in marine environments. There is currently little research about the seasonal changes in microplastics in coastal areas. Here, we report a seasonal study on the concentrations and characteristics of microplastics in the surface seawater and zooplankton of Jiaozhou Bay, a typical bay in the west Yellow Sea. The concentrations of microplastics in the surface water of Jiaozhou Bay were 0.063, 0.174, 0.094, and 0.050 pieces/m<sup>3 </sup>in February, May, August and November, respectively, with an annual average concentration of 0.095 pieces/m<sup>3</sup>, a low value compared with the plastic concentrations of other coastal areas. The size of the collected microplastics ranged from 346 to 155200 μm, with an average of 5093 μm. The overall percentages of fibers, fragments and plastic foams were 29%, 55% and 16%, respectively. Fragments were the most dominant shape in four seasons. Nine plastic polymers were detected from the surface water of Jiaozhou Bay. The dominant chemical composition was polypropylene (PP), accounting for 51.04% of polymers, followed by polyethylene (PE), accounting for 26.04% of polymers. The seasonal variation of plastic characteristics in Jiaozhou Bay, including the shape, color and chemical composition, was significant. The highest concentration of plastics occurred in May and the lowest concentration of plastics occurred in November. Strong rainfall resulted in an increase in the plastic concentration in May, and winds and eddies affected the spatial distribution of plastics in Jiaozhou Bay. Focused on the dominant zooplankton groups in Jiaozhou Bay, the morphology, color, size, chemical composition and quantity of MPs in zooplankton were investigated in Jiaozhou Bay. The results showed that the MPs in zooplankton of the Jiaozhou Bay were dominated by fibers. The proportions of fiber in February, May, August and November were 91%, 88%, 89% and 88%, respectively. The average size of MPs in zooplankton was 441±2, 468±2, 576±2, and 379±4μm in the four seasons. For the 2 common zooplankton groups in the 4 seasons, the MP/zooplankton was 0.3, 0.26, 0.17, 0.19 for copepod, and 0.22, 0.19, 0.17, 0.45 for chaetognath, respectively.</p>

scholarly journals Assessment of Ecological and Target Hazard Risks of Mercury Contaminated Water Along Makassar Coastal Areas, Indonesia

2020 ◽  
Vol 8 (T2) ◽  
pp. 229-235
Author(s):  
Anwar Mallongi ◽  
Muh. Fajaruddin Natsir ◽  
Ratna Dwi Puji Astuti ◽  
Annisa Utami Rauf
Keyword(s):  
Surface Water ◽  
Ecological Risk ◽  
Coastal Area ◽  
Interpolation Method ◽  
Coastal Areas ◽  
Household Waste ◽  
Kriging Interpolation ◽  
Target Hazard Quotient ◽  
Waste Products ◽  
Kriging Interpolation Method

INTRODUCTION: The coastal area of Makassar city is a vulnerable area to various pollutants, most of which are generated by anthropogenic activities, such as home industry products, gold shop waste products, and household waste, starting from the coastal area in Barombong to the coastal villages in the Ujung Tanah subdistrict, with the highest level of mercury (Hg) concentration in the coastal area. Another source of potential Hg pollution in this area can be due to community activities at the fish landing base (PPI, Paotere). AIMS: The aims of this research were to analyze the Hg content in surface water collected from coastal areas of Makassar City and to analyze the target hazard risk effect due to the excessive exposure of water from the recognized as ecologically contaminated area. MATERIALS AND METHODS: This research applied an observational analytic design of cross-sectional studies. Direct measurement and laboratory sample analyses were conducted as well as a questionnaire was applied to obtain relevant, precise, and accurate data. Respondents’ characteristics related to education, habit, lifestyle, occupational smoking habits, and dietary were requested by the administered household interview questionnaire. Assay of the laboratory to analyze the magnitude of Hg in surface water was conducted. Respondents with volunteered based selected using stratified random sampling methods. RESULTS: Results of the analysis of Hg distribution in surface water used kriging interpolation method showed that the highest concentration of Hg was in stations (22 and 23) around Area of Anjungan Losari Beach and Area of Anjungan Mandar Losari with 1.0013 and 1.0012 mg/l, respectively. While the lowest were in station 2 with 0.0011 and in station 26 Pelindo Jetti area with 0.0013 mg/l, respectively. Ecological Risk assessment indicated that the areas with the highest risk of ecology were such as Near Dermaga Kayu Bangkoa with 9.8, the Tourism area of Karaeng Batjo Tomb 9.7, and Tanjung Bayang beach with risk ecology 9.1 units, respectively. Furthermore, the magnitude of Target Hazard Quotient (THQ) values were 0.0093 in station 1 in Tourism area of Karaeng Batjo Tomb and 0.0089 units in station 24 of Port of Sukarno Hatta, respectively. CONCLUSIONS: To conclude, Hg levels of contamination in water are still be tolerated in the current; however, its accumulate that potentially harmful in the near future. Ecological risk value was more than one that indicates at risks, although the THQ values are still below than the one that indicates safe.

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