Analyses and assessment of the spatial and temporal distribution of nitrogen compounds in surface waters

2012 ◽  
Vol 27 (2) ◽  
pp. 187-196 ◽  
Author(s):  
Nedyalka Georgieva ◽  
Zvezdelina Yaneva ◽  
Gergana Kostadinova
Keyword(s):  
Surface Waters ◽  
Temporal Distribution ◽  
Nitrogen Compounds ◽  
Spatial And Temporal Distribution

Spatial and temporal distribution of pesticide residues in surface waters in northeastern Greece

2009 ◽  
Vol 43 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Z. Vryzas ◽  
G. Vassiliou ◽  
C. Alexoudis ◽  
E. Papadopoulou-Mourkidou
Keyword(s):  
Surface Waters ◽  
Pesticide Residues ◽  
Temporal Distribution ◽  
Spatial And Temporal Distribution

scholarly journals Nitrogen species distribution in groundwater of the Haihe River Plain

2018 ◽  
Vol 19 (4) ◽  
pp. 1195-1203
Author(s):  
Hao Zhang ◽  
Pingping Miao ◽  
Ala Aldahan ◽  
Peng Yi ◽  
Dalal Alshamsi
Keyword(s):  
Industrial Wastewater ◽  
Temporal Distribution ◽  
Health Concern ◽  
Nitrogen Compounds ◽  
Spatial And Temporal Distribution ◽  
Nitrogen Species ◽  
Total Water ◽  
Haihe River ◽  
River Plain ◽  
Groundwater Wells

Abstract Natural and anthropogenic nitrate (NO3-N), nitrite (NO2-N) and ammonia (NH4-N) in groundwater represents vital environmental and health concern issue globally. Here, we present data and discuss sources of nitrogen compounds in the groundwater that accounts for two-thirds of the total water supply of the Haihe River Plain with a population of over 100 million. The spatial and temporal distribution of the nitrogen compounds (NO3-N, NO2-N, NH4-N) in the groundwater are linked to a variety of sources, such as fertilizers, domestic sewages, industrial wastewater and precipitation. About 12.64%, 53.90% and 16.73% of the investigated groundwater wells in the Haihe River Plain have NO3-N, NO2-N and NH4-N concentrations above permissible values for drinking water, respectively. Comprehensive actions such as changing farming methods, applying fertilizer at suitable times and appropriate irrigation pattern for the Haihe River Plain are required to reduce the nitrogen pollution in the future.

scholarly journals Microplastics Investigation Using Zooplankton Samples from the Coasts of Cyprus (Eastern Mediterranean)

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2272
Author(s):  
Grigoria Vasilopoulou ◽  
George Kehayias ◽  
Demetris Kletou ◽  
Periklis Kleitou ◽  
Vassilios Triantafyllidis ◽  
...  
Keyword(s):  
Surface Waters ◽  
Eastern Mediterranean ◽  
Temporal Distribution ◽  
Spatial And Temporal Distribution ◽  
Total Zooplankton ◽  
Western Basin ◽  
Average Area ◽  
The World ◽  
Abundance And Distribution

The Mediterranean Sea has the highest accumulation of microplastics in the world. Although numerous studies about microplastic’s abundance and distribution have been conducted, the majority sampled surface waters. Especially for the Eastern Mediterranean, there is no information concerning the deeper strata. This study fills this gap by studying the microplastic spatial and temporal distribution along the coasts of Cyprus, utilizing zooplankton samples collected from the entire 0–50 m depth layer. The average microplastics’ abundance was 41.31 ± 22.41 items/m3 indicating that the Eastern Mediterranean seems to be much more polluted than the western basin. The fibers outnumbered the abundance of the fragments by a factor of ten. Most fibers were sized between 0.5 and 1.0 mm, and 81.24% were transparent. The average area of the fragments was ≤0.05 mm2, and most of them were hard-rounded (53.38%). The microplastics to zooplankton ratio ranged between 0.021 and 0.241. A positive correlation was found between the abundance of microplastics and the total zooplankton, especially the copepods. Studies of microplastics in zooplankton samples taken from the water column are expected to provide better insights into the role of these pollutants in marine ecosystems.

scholarly journals SPATIAL AND TEMPORAL DISTRIBUTION OF MARINE CLADOCERAN SPECIES IN THE SURFACE WATERS OF ISKENDERUN BAY

2018 ◽  
pp. 65-73
Author(s):  
Tuba Terbıyık Kurt ◽  
Benin Toklu Alıçlı ◽  
Sevim Polat
Keyword(s):  
Surface Waters ◽  
Temporal Distribution ◽  
Spatial And Temporal Distribution ◽  
Cladoceran Species ◽  
Iskenderun Bay

Watching Where You're Going: An Analysis of the Spatial and Temporal Distribution of Attention During Walking

2007 ◽  
Author(s):  
Jason S. Augustyn ◽  
Caroline R. Mahoney ◽  
M. R. Fletcher ◽  
Edward Hirsch
Keyword(s):  
Temporal Distribution ◽  
Spatial And Temporal Distribution

The Measurement of Spatial and Temporal Distribution of Radiation, Using a Talbot Spectrometer.

1972 ◽  
Author(s):  
Adolf W. Lohmann ◽  
Donald E. Silva
Keyword(s):  
Temporal Distribution ◽  
Spatial And Temporal Distribution

scholarly journals Spatial and Temporal Distribution of the Multi-element Signatures of the Estuarine Non-indigenous Bivalve Ruditapes philippinarum

2021 ◽  
Author(s):  
Soraia Vieira ◽  
Pedro Barrulas ◽  
Paula Chainho ◽  
Cristina Barrocas Dias ◽  
Katarzyna Sroczyńska ◽  
...  
Keyword(s):  
Temporal Distribution ◽  
Ruditapes Philippinarum ◽  
Spatial And Temporal Distribution
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