Linked Optimal Reactive Contaminant Source Characterization in Contaminated Mine Sites: Case Study

2016 ◽  
Vol 142 (12) ◽  
pp. 04016061 ◽  
Author(s):  
Hamed K. Esfahani ◽  
Bithin Datta
New Forests ◽  
2018 ◽  
Vol 50 (2) ◽  
pp. 217-239 ◽  
Author(s):  
Morgane Merlin ◽  
Frances Leishman ◽  
Ruth C. Errington ◽  
Bradley D. Pinno ◽  
Simon M. Landhäusser

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2415
Author(s):  
Azade Jamshidi ◽  
Jamal Mohammad Vali Samani ◽  
Hossein Mohammad Vali Samani ◽  
Andrea Zanini ◽  
Maria Giovanna Tanda ◽  
...  

The paper presents a new approach to identify the unknown characteristics (release history and location) of contaminant sources in groundwater, starting from a few concentration observations at monitoring points. An inverse method that combines the forward model and an optimization algorithm is presented. To speed up the computation, the transfer function theory is applied to create a surrogate transport forward model. The performance of the developed approach is evaluated on two case studies (literature and a new one) under different scenarios and measurement error conditions. The literature case study regards a heterogeneous confined aquifer, while the proposed case study was never investigated before, it involves an aquifer-river integrated flow and transport system. In this case, the groundwater contaminant originated from a damaged tank, migrates to a river through the aquifer. The approach, starting from few concentration observations monitored at a downstream river cross-section, accurately estimates the release history at a groundwater contaminant source, even in presence of noise on observations. Moreover, the results show that the methodology is very fast, and can solve the inverse problem in much less computation time in comparison with other existing approaches.


2019 ◽  
Vol 25 (3) ◽  
pp. 308 ◽  
Author(s):  
Bradley P. Smith ◽  
Anne-Louise Vague ◽  
Robert G. Appleby

This study provides insight into the attitudes and perceptions of people who live alongside dingoes in a remote Australian mining town. A mixed-methods, self-administered questionnaire was circulated, targeting employees across 11 departments (n=160). Overall, employees saw dingoes favourably (60.5%), and believed that humans and dingoes should be able to coexist (75.8%). Dingoes were not considered to be causing unacceptable damage or to be overabundant, despite being seen almost daily at both the village and work sites. A total of 31.4% of employees had felt threatened or scared because of a dingo on more than one occasion, and 16.5% had experienced a dingo being aggressive towards them at least once. Yet, only 21.0% of employees considered dingoes dangerous to people, and few worried about their safety at the village or work site (9.5% and 11.4% respectively), or the safety of others in general (21.6%). There was a dichotomy of views regarding the dingo’s presence: employees were supportive of dingoes living in close proximity at the mine, as long as they were not directly being problematic (i.e. representing a personal threat, or causing property damage). Half of the employees surveyed (50.4%) felt that management decisions relating to dingoes were personally important to them, highlighting the need to ensure that employees are consulted, and that dingo management strategies are well communicated. These findings have implications for improving the success rates of management approaches to human–carnivore conflict at mine sites and other situations where predators are perceived to threaten human safety.


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