scholarly journals Nutrient pollution enhances productivity and framework dissolution in algae- but not in coral-dominated reef communities

2021 ◽  
Vol 168 ◽  
pp. 112444
Author(s):  
Florian Roth ◽  
Yusuf C. El-Khaled ◽  
Denis B. Karcher ◽  
Nils Rädecker ◽  
Susana Carvalho ◽  
...  
Keyword(s):  
Nutrient Pollution ◽  
Reef Communities

Nutrient pollution degrades microbialites in Lough Carra, an Irish marl lake

2019 ◽  
Vol 83 (3) ◽  
pp. 203-209 ◽  
Author(s):  
P Doddy ◽  
CM Roden ◽  
MP Gammell
Keyword(s):  
Nutrient Pollution ◽  
Marl Lake

Cascading effects of fishing on Galapagos rocky reef communities

2007 ◽  
Vol 343 ◽  
pp. 77-85 ◽  
Author(s):  
JI Sonnenholzner ◽  
LB Ladah ◽  
KD Lafferty
Keyword(s):  
Rocky Reef ◽  
Cascading Effects ◽  
Reef Communities

SOURCES OF NUTRIENT POLLUTION IN FALLS LAKE

2018 ◽  
Author(s):  
Megan M. Larson ◽  
◽  
Sophia Becker ◽  
Sophia Becker ◽  
Quincy Randolph ◽  
...  
Keyword(s):  
Nutrient Pollution

scholarly journals Harmonized assessment of nutrient pollution from urban systems including losses from sewer exfiltration: a case study in Germany

2021 ◽  
Author(s):  
Hong Hanh Nguyen ◽  
Markus Venohr
Keyword(s):  
Pollution Control ◽  
Expert Knowledge ◽  
Age Factors ◽  
Urban Systems ◽  
Nutrient Pollution ◽  
Extended Model ◽  
Urban Wastewater ◽  
Model Framework ◽  
Public And Private ◽  
Wastewater Systems

AbstractA growing literature indicates that untreated wastewater from leaky sewers stands among major sources of pollution to water resources of urban systems. Despite that, the quantification and allocation of sewer exfiltration are often restricted to major pipe areas where inspection data are available. In large-scale urban models, the emission from sewer exfiltration is either neglected (particularly from private sewers) or represented by simplified fixed values, and as such its contribution to the overall urban emission remains questionable. This study proposes an extended model framework which incorporates sewer exfiltration pathway in the catchment model for a better justified pollution control and management of urban systems at a nationwide scale. Nutrient emission from urban areas is quantified by means of the Modelling of Nutrient Emissions in River Systems (MONERIS) model. Exfiltration is estimated for public and private sewers of different age groups in Germany using the verified methods at local to city scales, upscaling techniques, and expert knowledge. Results of this study suggest that the average exfiltration rate is likely to be less than 0.01 L/s per km, corresponding to approximately 1 mm/m/year of wastewater discharge to groundwater. Considering the source and age factors, the highest rate of exfiltration is defined in regions with significant proportions of public sewers older than 40 years. In regions where public sewers are mostly built after 1981, the leakage from private sewers can be up two times higher than such from public sewers. Overall, sewer exfiltration accounts for 9.8% and 17.2% of nitrate and phosphate loads from urban systems emitted to the environment, which increases to 11.2% and 19.5% in the case of no remediation scenario of projected defective sewer increases due to ageing effects. Our results provide a first harmonized quantification of potential leakage losses in urban wastewater systems at the nationwide scale and reveal the importance of rehabilitation planning of ageing sewer pipes in public and private sewer systems. The proposed model framework, which incorporates important factors for urban sewer managers, will allow further targeting the important data need for validating the approach at the regional and local scales in order to support better strategies for the long-term nutrient pollution control of large urban wastewater systems.

Methods for Treatment of Animal Manures to Reduce Nutrient Pollution Prior to Soil Application

2015 ◽  
Vol 1 (1) ◽  
pp. 47-56 ◽  
Author(s):  
Ariel A. Szogi ◽  
Matias B. Vanotti ◽  
Kyoung S. Ro
Keyword(s):  
Nutrient Pollution ◽  
Soil Application ◽  
Animal Manures
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