Spatial and Temporal Variability of Residual Volume Transport according to Artificial Freshwater Discharge in Yeoungsan River Estuary, South Korea

2016 ◽  
Vol 75 (sp1) ◽  
pp. 153-157
Author(s):  
Jin Il Song ◽  
Jong Wook Kim ◽  
Byung Il Yoon ◽  
Seung-Buhm Woo
Keyword(s):  
South Korea ◽  
Temporal Variability ◽  
River Estuary ◽  
Volume Transport ◽  
Freshwater Discharge ◽  
Spatial And Temporal Variability ◽  
Residual Volume

scholarly journals Intra–Community Scale Variability of Air Quality in the Center of a Megacity in South Korea: A High-Density Cost-Effective Sensor Network

2021 ◽  
Vol 11 (19) ◽  
pp. 9105
Author(s):  
Yongmi Park ◽  
Ho-Seon Park ◽  
Subin Han ◽  
Kyucheol Hwang ◽  
Seunghyun Lee ◽  
...  
Keyword(s):  
Air Quality ◽  
South Korea ◽  
Sensor Network ◽  
Temporal Variability ◽  
Urban Areas ◽  
Pearson Correlation ◽  
Urban Canopy ◽  
Air Pollutant ◽  
Sensor Nodes ◽  
Spatial And Temporal Variability

To investigate the spatial and temporal variability of air quality (CO, NO2, O3, and PM2.5) with a high spatial resolution in various adjacent micro-environments, 30 sets of sensor-nodes were deployed within an 800 × 800 m monitoring domain in the center of the largest megacity (Seoul) in South Korea. The sensor network was operated in summer and winter. The daily variation in air pollutant concentrations revealed a similar trend, with discernible concentration differences among monitoring sub-sites and a government-operated air quality monitoring station. These differences in pollutant levels (except PM2.5) among the sub-sites were pronounced in the daytime with high volumes of traffic. The coefficient of divergence and Pearson correlation coefficient showed that spatial and temporal variability was more significant in summer than winter. Ozone displayed the greatest spatial variability, with little temporal variability among the sub-sites and a negative correlation with NO2, implying that ozone concentrations were primarily determined by vehicular NOX emissions due to NO titration effects under the urban canopy. The PM2.5 concentration displayed homogeneous spatial and temporal distributions over the entire monitoring period, implying that PM2.5 monitoring with at least a 1 × 1 km resolution is sufficient to examine the spatial and temporal heterogeneity in urban areas.

scholarly journals Spatial and temporal variability of freshwater discharge into the Gulf of Alaska

2015 ◽  
Vol 120 (2) ◽  
pp. 634-646 ◽  
Author(s):  
D. F. Hill ◽  
N. Bruhis ◽  
S. E. Calos ◽  
A. Arendt ◽  
J. Beamer
Keyword(s):  
Temporal Variability ◽  
Gulf Of Alaska ◽  
Freshwater Discharge ◽  
Spatial And Temporal Variability

scholarly journals Spatial and temporal variability of the transformation of dissolved matter runoff in the Mezen’ River estuary

2019 ◽  
Vol 59 (2) ◽  
pp. 216-226
Author(s):  
A. V. Savenko ◽  
N. A. Demidenko ◽  
O. S. Pokrovsky
Keyword(s):  
Temporal Variability ◽  
Major Ions ◽  
Vertical Mixing ◽  
River Estuary ◽  
Spatial And Temporal Variability ◽  
Pore Waters ◽  
Spatial Homogeneity ◽  
Organic Complexes ◽  
Dissolved Matter

Spatial and temporal variability of the transformation of dissolved matter runoff in the Mezen’ River estuary is studied by results of the complex hydrological-hydrochemical researches lead in 2009 and 2015. The conservative behavior of major ions and dissolved forms of Li, Rb, Cs, Sr, B, F, As, Sb, and Mo is demonstrated. The additional input into solution reaching 93 and 32–38% of content in the river water mass is determined for phosphates and silicon. This is caused, apparently, by mobilization of these nutrients from pore waters of regularly tide-stirred bottom sediments and vertical mixing of the water column. The desorption flux of barium and uranium due to long-term interaction of terrigenic material with saline waters exceeded their input with a continental runoff reaching 180–380 and 90–150% of content of these elements in the river waters. Up to 50, 43, 29, 32, 44, 50, and 45% of Fe, Pb, Y, La, Ce, Pr, and Nd supplying with river runoff which are present in the form of strong organic complexes are removed from solution at the beginning of the mixing zone due to coagulation of colloids. It is drawn a conclusion on spatial homogeneity and long-term stability of transformation features of dissolved matter runoff in the Mezen’ River estuary. Peculiar characteristic of migration of dissolved phosphates, silicon, barium, and uranium are caused by hydrological features of the estuary.

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