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Charles Haas, F.ASCE
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RE: Engineer's Role in Flint, Michigan Lead Issue?
Posted By
Charles Haas
07-28-2019 09:20 AM
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Environment, Coasts, Oceans, & Infrastructure
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Michael - the Michigan AG has gone to court against two of the engineering firms involved. Here is a recent article: https://www.detroitnews.com/story/news/michigan/flint-water-crisis/2019/07/16/nessel-engineering-firms-played-seminal-role-flint-water-crisis/1747221001/ ------------------------------ ...
RE: Stormwater as a resource
Posted By
Charles Haas
07-11-2019 08:32 AM
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Environment, Coasts, Oceans, & Infrastructure
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Here is a link to our papers via google scholar. A lot was done (by a recent PhD) in Australia, but some domestically. https://scholar.google.com/scholar?hl=en&as_sdt=0%2C39&q=author%3Acn-haas+rainwater&btnG= ------------------------------ Charles Haas F.ASCE LD Betz Professor of Environ. Eng. ...
RE: Stormwater as a resource
Posted By
Charles Haas
07-10-2019 09:34 AM
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Environment, Coasts, Oceans, & Infrastructure
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Here is a resource page for onsite non potable reuse: http://uswateralliance.org/initiatives/commission/resources There is an ongoing research project from WRF on building scale potable reuse: http://www.waterrf.org/Pages/Projects.aspx?PID=4691 I would echo that based on our research and others, ...
RE: How to desalinate wastewater?
Posted By
Charles Haas
07-10-2019 09:33 AM
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I suspect your volumes/flows are so low to make justification of a more complex strategy not cost competitive. For desalination only, you are really limited to mechanical evaporation. I suspect though that there are other chemical contaminants, and therefore the use of something like RO without pre-treatment ...
RE: Pathogens in the Water Supply
Posted By
Charles Haas
12-08-2018 06:15 AM
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Environment, Coasts, Oceans, & Infrastructure
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This is not a simple question. If pressure is maintained consistently throughout, then intrusion is minimized. However in the presence of pressure transients, intrusion becomes more likely. LeChevallier and colleagues have studied this a lot - see some of the references from this link: https://scho ...
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