Year: 2018

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AERMET Made Easy – Accessing Surface Data

AERMET Made Easy – Accessing Surface Data

We are all familiar with buying a product that requires assembly, typically furniture or some kind of toy-like contraption if you have kids. The expectation is there will be a list of parts (all identified), a list tools necessary for the assembly, and instructions taking you step-by-step through the process. Sometimes, there are pictures and…

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AERMET Made Easy – Selecting Weather Stations

AERMET Made Easy – Selecting Weather Stations

“When using National Weather Service (NWS) data for AERMOD, data representativeness can be thought of in terms of constructing realistic planetary boundary layer (PBL) similarity profiles and adequately characterizing the dispersive capacity of the atmosphere.  As such, the determination of representativeness should include a comparison of the surface characteristics (i.e., zo, Bo and r) between…

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Connect Your Modeling Database to Your AQA

Connect Your Modeling Database to Your AQA

It is rare to have a dispersion modeling project that you start on and finish without any changes during the process. There is almost always a modification to emission rates or an updated design that moves a source or raises or lowers a stack height. Typically, these changes happen when you are 99% completed with…

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Connect Your Modeling Database to Your GIS

Connect Your Modeling Database to Your GIS

When I was in graduate school, I attended a graduate seminar on design optimization algorithms. The case study presented was on design improvements of the structural components of a minivan. The inputs into the algorithms were the current minivan design and all the criteria for required regulatory and industry design constraints, standards, and rules and…

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Using Databases with Dispersion Modeling: Calculation Examples

Using Databases with Dispersion Modeling: Calculation Examples

We love feedback. One common comment regarding the article on “Calculations with Queries” (http://www.naviknow.com/2018/07/25/using-databases-calculations-with-queries/) was that people wanted to see more examples. To follow is a relevant example that captures quite a few topics covered in both the previous article. Let’s suppose you have created a data table in your database to store data on…

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