Benthic diatom assemblages as indicators of water quality in an urban flood-water impoundment, Neue Donau, Vienna, Austria

Nova Hedwigia ◽  
1997 ◽  
Vol 65 (1-4) ◽  
pp. 273-283
Author(s):  
Martin T. Dokulil ◽  
Roland Schmidt ◽  
Sigrid Kofler
Keyword(s):  
Water Quality ◽  
Benthic Diatom ◽  
Diatom Assemblages ◽  
Urban Flood ◽  
Flood Water ◽  
Water Impoundment

scholarly journals Water Quality Dynamics of Urban Water Bodies During Flooding in Can Tho City, Vietnam

2017 ◽  
Author(s):  
Hong Quan Nguyen ◽  
Mohanasundar Radhakrishnan ◽  
Thi Thao Nguyen Huynh ◽  
Maria Luisa Baino-Salingay ◽  
Long Phi Ho ◽  
...  
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Health Risk ◽  
Open Water ◽  
Quality Parameters ◽  
Flood Events ◽  
Urban Flood ◽  
Flood Water ◽  
Can Tho City ◽  
Water Canals

Water pollution associated with flooding is one of the major problems in cities in the global South. However, studies of water quality dynamics during flood events are not often reported in literature, probably due to difficult conditions for sampling during flood events. Water quality parameters in open water (canals, rivers, and lakes), floodwater on roads and water in sewers have been monitored during the extreme fluvial flood event on 7 October 2013 in Can Tho city, Vietnam. This is the pioneering study of urban flood water pollution in real time in Vietnam. The results showed that water quality is very dynamic during flooding, especially at the beginning of the event. In addition, it was observed that the pathogen and contaminant levels in the floodwater are almost as high as in sewers. The findings show that population exposed to flood water runs a health risk that is nearly equal to that of being in contact with sewer water. Therefore the people of Can Tho not only face physical risk due to flooding, but also exposed to health risk.

scholarly journals URBAN FLOOD IMPACTS, FLOOD WATER QUALITY AND RISK MAPPING OF OLODO AREA, IBADAN, NIGERIA

2021 ◽  
Vol 19 (1) ◽  
pp. 56-73
Author(s):  
O. H. ADEDEJI ◽  
O. O. OLAYINKA ◽  
T. OGUNDIRAN ◽  
O. O. TOPE-AJAYI
Keyword(s):  
Water Quality ◽  
Digital Terrain Model ◽  
Flood Plain ◽  
Urban Flood ◽  
Flood Water ◽  
Terrain Model ◽  
Flood Impacts ◽  
Digital Terrain ◽  
High Resolution Satellite Imagery ◽  
Gis Environment

This study assessed urban flood impact, flood water quality and vulnerability around Olodo area of Ibadan region, Nigeria. The study employed remote sensing and GIS techniques in creating vulnerability and risk maps. Digital terrain model (DTM) was used to get the topography of the study area. Footprints of buildings along the Egberi riverbank and flood plain in Olodo were created in the GIS environment from high resolution satellite imagery. Buffering operation was conducted to classify the buildings into risk zones based on closeness to the riverbank using ArcGIS 10.0. The study revealed that 326 buildings were within the very vulnerable and vulnerable zones because they were less than 15.2m away from the riverbank. The characteristics of water quality change during the flood and non-flood periods. TSS, DO, NOD, and COD were all higher during the flood event. Microbial analysis showed that water quality levels in the floodwater exceeded water quality standards (e.g., the coliform excess from 10 to 10,000 times), and thus this may be a health risk for local people during flood events. Concentration of Escherichia coli (E. coli) ranged from 484 to 1290 cfu/100 mL during flooding compared to 192 to 295 cfu/100 mL after flood. Salmonella was found to be high ranging from 659 to 1840 cfu/100 mL during flooding compared to 530 to 1034 cfu/100 mL after flooding.      

State-of-the-Art of Modeling Surface Water Impoundments

1982 ◽  
Vol 14 (1-2) ◽  
pp. 241-261 ◽  
Author(s):  
P A Krenkel ◽  
R H French
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
State Of The Art ◽  
Rate Coefficients ◽  
Two Dimensional ◽  
One Dimensional ◽  
Integral Energy ◽  
Range Of Values ◽  
Dimensional Integral ◽  
Water Impoundment

The state-of-the-art of surface water impoundment modeling is examined from the viewpoints of both hydrodynamics and water quality. In the area of hydrodynamics current one dimensional integral energy and two dimensional models are discussed. In the area of water quality, the formulations used for various parameters are presented with a range of values for the associated rate coefficients.

The concentrating method of benthic diatom affects the growth of juvenile sea cucumber (Apostichopus japonicus) and water quality

2017 ◽  
Vol 48 (8) ◽  
pp. 4503-4511 ◽  
Author(s):  
Ce Shi ◽  
Shuanglin Dong ◽  
Junwei Li ◽  
Fang Wang ◽  
Qinfeng Gao ◽  
...  
Keyword(s):  
Water Quality ◽  
Sea Cucumber ◽  
Apostichopus Japonicus ◽  
Benthic Diatom

Paleodepth determination from Antarctic benthic diatom assemblages

1997 ◽  
Vol 29 (3-4) ◽  
pp. 301-318 ◽  
Author(s):  
Jason M. Whitehead ◽  
Andrew McMinn
Keyword(s):  
Benthic Diatom ◽  
Diatom Assemblages

Epilithic diatoms of the St. Lawrence River and their relationships to water quality

1998 ◽  
Vol 76 (2) ◽  
pp. 251-257 ◽  
Author(s):  
Euan D Reavie ◽  
John P Smol
Keyword(s):  
Water Quality ◽  
Chlorophyll A ◽  
Suspended Solids ◽  
Fecal Coliforms ◽  
Weighted Averaging ◽  
Quebec City ◽  
Diatom Assemblages ◽  
Epilithic Diatoms ◽  
Epilithic Diatom ◽  
St Lawrence River

Epilithic diatoms were sampled at 48 sites along the St. Lawrence River, from Salaberry de Valleyfield to Québec City, in an attempt to determine how diatom assemblages were related to measured water quality variables. Canonical correspondence analysis was used to explore the relationships between environmental variables and patterns in the epilithic diatom assemblages. "Distance downstream from Cornwall" was determined to be the strongest variable influencing the structure of epilithic diatom assemblages, likely due to the effect of tides (favouring aerophilic species) closer to the river outlet. Variables related to pollution (suspended solids, fecal coliforms, chlorophyll a) also explained significant (P < 0.05) amounts of variance in the diatom assemblages. The optima of common diatom species to suspended solids were explored further. Reconstructive models using weighted-averaging calibration and regression illustrated that "distance from Cornwall" and concentrations of suspended solids, fecal coliforms, and chlorophyll a, the most influential variables, could be inferred from the diatom assemblages. When compared with the inference models developed for pollution variables using epiphytic diatom assemblages (attached to macrophytes or Cladophora), the epilithon model appears to perform better.Key words: diatoms, rocks, epilithic, St. Lawrence River, water quality, calibration.

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