Modelling non-structural Best Management Practices– focus on reductions in stormwater pollution

2005 ◽  
Vol 52 (5) ◽  
pp. 9-16 ◽  
Author(s):  
S. Ahlman ◽  
A. Malm ◽  
H. Kant ◽  
G. Svensson ◽  
P. Karlsson

This paper describes a modelling approach for evaluating the efficiency of different non-structural best management practices for stormwater management. A scenario with a set of source reduction practices was simulated using the substance flow model SEWSYS for an urban catchment in the city of Göteborg, Sweden. The scenario is based on a hypothetical control program that includes prevention, education and regulations. The simulation shows relatively high reductions of copper and PAH, 77% and 50%, respectively. The reduction in copper is mainly due to less copper roof corrosion and brake wear, while reduced road wear has the greatest effect for PAH. An important result from this study is that the non-structural BMPs applied did not give a sufficient reduction in pollution to meet the desirable environmental quality criteria. To meet these criteria, additional BMPs must be implemented, preferably a combination of both non-structural and structural measures.

2021 ◽  
Author(s):  
Sara Garcia Figuera ◽  
Holly Deniston-Sheets ◽  
Elizabeth E Grafton-Cardwell ◽  
Bruce Babcock ◽  
Mark Lubell ◽  
...  

Huanglongbing (HLB) disease of citrus, associated with the bacterium “Candidatus Liberibacter asiaticus”, is confined to residential properties in Southern California eight years after it was first detected in the state. To prevent the spread of HLB to commercial citrus groves, growers have been asked to adopt a portfolio of voluntary best management practices. This study evaluates the citrus industry’s propensity to adopt these practices using surveys and a novel multivariate ordinal regression model. We estimate the impact on adoption of perceived vulnerability to HLB, intentions to stay informed and communicate about the disease and various socio-economic factors, and reveal what practices are most likely to be jointly adopted as an integrated approach to HLB. Survey participants were in favor of scouting and surveying for HLB symptoms, but they were reluctant to test trees, use early detection technologies (EDTs) or install barriers around citrus groves. Most practices were perceived as complementary, particularly visual inspections and some combinations of preventive practices with tests and EDTs. Participants who felt more vulnerable to HLB had a higher propensity to adopt several practices, as well as those who intended to stay informed and communicate with the coordinators of the HLB control program, although this effect was modulated by the perceived vulnerability to HLB. Communication with neighbors and the size of citrus operations also influenced practice adoption. Based on these results, we provide recommendations for outreach about HLB management in California and suggest future directions for research about the adoption of plant disease management practices.


Author(s):  
Jonas Gomes da Silva ◽  
Juliana Assunção de Souza

In 2010, the Brazilian Institute of Geography and Statistics published a survey on urban afforestation in Brazil and Manaus city occupied the 4493rd place among the 5565 municipalities analyzed. Concerning the cities with more than 1 million habitants, Manaus was in the penultimate place, a frustrating result, since the city is the Amazon' capital, surrounded by the largest rainforest in the World. On the other hand, the cities with the best performances were Goiânia, Campinas, Belo Horizonte, Porto Alegre, and Curitiba. Given this context, the research aims to investigate the urban afforestation's best management practices to propose suggestions for Manaus' public managers. The data collection and analysis are based in the study "Urbanistic Characteristics of the Surroundings of the Domiciles", besides obtaining information and documents from articles and websites of the governments and partners of the best city investigated. After the intersection of information, 36 good urban management practices were cataloged and proposed to Manaus' public managers.


1998 ◽  
Vol 38 (10) ◽  
pp. 91-97 ◽  
Author(s):  
H. Sieker ◽  
M. Klein

Because of multiple constraints, e.g. existing drainage systems, little available space and higher costs, Best Management Practices (BMP) for stormwater-runoff in existing urban areas is more difficult to apply than for new urban developments. For a large urban catchment (about 22 km2) with a separate drainage system in Berlin, Germany a combination of decentral (non-structural) and semi-central stormwater-management measures proved to be the best solution. It offers a high effectiveness concerning stormwater treatment at relatively low costs. Modern planning tools such as Geographic Information Systems (GIS) were used to investigate the possibilities of implementing decentral measures in larger areas. Correlations between field surveys and data from the ‘Environmental Information System’ of Berlin shows that even in highly urbanised areas a disconnection of 30% of the impervious area can easily be achieved. The resulting reduction of the discharge makes it possible to convert existing retention tanks to soil filter tanks. The purification efficiency of this combined measures is higher than of a central stormwater settling tank which has been simulated with a pollution load model.


2021 ◽  
Author(s):  
Zulfiqar Ali Khowaja

Pollutant loading from urban runoff has been established as a major cause of receiving water degradation. In an effort to control this problem at the source many Best Management Practices (BMP) have been developed. In this report, the Atlantis Exfiltration Tanks System, was developed as a potential BMP for the City of Sarnia. In order to analyze the efficiency and performance characteristics of the Atlantis Exfiltration Tanks, it is necessary to conduct pilot study before implementation. For this purpose, the highly impervious parking lot of the Newton's Park in Sarnia was selected to develop the Atlantis Exfiltration System (AES). The construction of AES was completed in summer of 2004. AES is an "at source" base water purification and storage system. This report includes the construction and performance of AES followed by conclusions and recommendations for further study.


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