AERMET | NaviKnow

Downloading Meteorological Data – NK2.0 App

20JulJuly 20, 2020 By NaviKnow

The purpose of a Rube Goldberg machine is to take the simplest of tasks and make the process so elaborate and grotesquely complicated, it is outright comical. It’s meant to be a joke. Though my sense of humor can be warped at times, there is nothing funny when it comes to dispersion modeling. At times,…

Dispersion Modeling Simplified – Bits and Pieces

17JulJuly 17, 2019 By NaviKnow

When we say something is complicated, what does that really mean? In grad school, I had a final that had just two problems. The first problem was, from basic principles, derive the full (no simplifications) Navier-Stokes equations. The second problem was to derive the full vorticity equations and identify what each term means. In high…

Dispersion Modeling Audits: Using NK Tools

14Nov By NaviKnow

Neil Armstrong and Buzz Aldrin landing and walking on the moon was quite an achievement. Though the ultimate goal was to put humans on the moon, the steps to get to that end point didn’t exactly resemble the final product. The beginning stages of the preparation for the moonshot were very crude, clumsy, and addressed…

Dispersion Modeling Audits: Model Results and Other Issues

07NovNovember 5, 2018 By NaviKnow

On October 9th, 2018, the Texas Commission on Environmental Quality (TCEQ) announced and introduced its plan to expedite air quality permit application reviews at its Autumn Environmental Conference. TCEQ rolled out spreadsheet workbook templates that would take the place of many of the forms required for an air quality permit application. The rationale for the…

Dispersion Modeling Audits: Representation Accuracy

02NovNovember 2, 2018 By NaviKnow

Remember how we used to shop in an actual store. Remember going to the video store for tapes and/or DVDs. Think of how things are now. Those changes did not occur overnight. Also, the way these companies started out is not at all the way they ended up being today. Amazon sold books. Netflix sent…

Dispersion Modeling Audits: The Audit Process

17Oct By NaviKnow

I do not go out to eat that much. The main reason is, eating a meal outside of my home, stresses me out. At home, I know where everything is. I know the format of how the food is going to be dispersed and served. I know where all the tools are. I know where…

Call for Forward-Looking Companies

17OctOctober 24, 2018 By NaviKnow

Sometimes I really wonder if I am a clairvoyant. The topic for this month’s webinar series was decided upon months ago. I knew the TCEQ Autumn Environmental Conference (Air Permitting Workshop) was going to be the week before the webinars were to happen, but there was no conference agenda out until a few week ago….

AERMET Made Easy – AERMET Input Files

26SepSeptember 25, 2018 By NaviKnow

AERMET – As Easy as a 1-Ah and a 2-Ah and a 3 If you have read the previous articles on locating and obtaining surface and upper air meteorological and land use data (stations, surface, upper air and land use), you now are at the point of learning how to put together the information you…

Mapping Land Use / Land Cover Codes from NLCD1992 to NLCD2011

19Sep By NaviKnow

If you do chose to use land use data from the USGS that is more recent than 1992 (NLCD for 2001, 2006, 2011, and 2016), be aware that the classification schema for the newer data is slightly different. The table below shows the mapping for the classification codes. Though it is import to know the…

AERMET Made Easy – Accessing Upper Air Data and AERSURFACE

19Sep By NaviKnow

When I was in elementary school in the 1960’s and 70’s, if you needed to look something up, like relevant dates, historical figures and events, etc., you would go to the library. Being too young to drive to the library, I often relied upon the encyclopedias my parents had bought many years earlier; 1955 to…