Water is a precious commodity everywhere, especially west of the Mississippi River in the USA and in many other countries around the world.

Using a modified version of the KohlerNordensonFox equation (1955), this demonstration calculates how much water evaporates from a pool or a pond as a function of the dimensions of a rectangular container, the wind speed, humidity, and vapor pressure of water.

The Demonstration Project may be viewed, partially executed, or downloaded from:

http://demonstrations.wolfram.com/EvaporationOfWaterFromAPoolOrPond/

This program may be modified to obtain the percent of the spilled hazardous materials that evaporates when for example a gasoline delivery truck spills its cargo (gasoline) on the earth.

Please let me know if you are interested in calculating the amount of the spilled hazardous material.

Below is a part of my presentation given on Thursday, October 9, 2008 in Wisconsin Dells, Wisconsin.

My presentation contained 3 parts:

I) Part one of my presentations showed how to obtain a height of a UST from the given volume of a UST, and then using this height to obtain the volume ensuring that both parameters belong to the same UST. The topic was “Obtaining the Volume and the Height (Radius) of a UST”. There are similar programs but they convert product height to the product volume and not volume to height. Obtaining the product height from the product volume is a bit more difficult and requires solving a non-linear equation. If someone wants a free copy of this program, please let me know.

II) Relevance and the importance of the above topic: There are a few companies that have a “Tank Calculator” on their web which goes from height to volume, if someone knows one similar to ours, please let me know. One of the requirements in the protocol “Continuous In Tank Leak.” is to obtain the height from the volume.

III) “Obtaining the lost volume/dimension of a tank” was the title of part two of my presentation. This happens when the owner/operator loses their chart.

Relevance: I remember at least on one occasion someone wanted to know how to obtain the tank dimensions. Their email is probably still there among my old emails.

IV) “Static Versus Dynamic Calculation” this was probably the most important part of my presentation. We now have volumes of data coming from UST (something like 21,600 lines per month from each UST). We also know having more data helps us make better assessment of the condition of the UST. So how are we going to analyze this large amount of data? Analyze the data like some banks, one piece of data at a time? That is when dynamic analysis of the data comes into play. Please visit some of the sites mentioned on my PowerPoint to get a feel for dynamic analysis.

During our meeting, I passed out a copy of my PowerPoint presentation to everyone explaining all the above topics. The same exact PowerPoint may be emailed to those interested individuals. By the way a few attendees sent emails and wanted a copy of the “Tank calculator”.

The 3 files presented at this meeting and may be downloaded are:
Flat_Tank_Height_Finder3Help_Flat_Tank_Height_Finder

These two presentations cover the performance of pipeline systems by obtaining the probability of the false alarm, PFA, and the probability of the detection, PD were presented at the NWGLDE meeting in Sacramento, CA. These presentations which are in PowerPoint and Excel, explain how the different statistics are obtained using the data from the EPA protocol “Standard Test Procedures for Evaluation Leak Detection Methods: Pipeline Leak Detection Systems”. The two presentations are called:p77_78_test_mean_2; nwg09_pres

The boiling temperature of water decreases as the pressure decreases or as the altitude increases. For example, water boils at 212 F at or near the sea level. In Oxford, MS, where the elevation is about 505 ft., water boils at 211 F. In Golden, CO, where the elevation is about 5600 ft, water boils at 201 F.

We have contributed a program to Mathematica that obtains the boiling temperature of water for varying elevation by just moving a knob called the “Slider”. Below is the web page for our demo in Mathematica:

http://demonstrations.wolfram.com/BoilingPointOfWaterAsAFunctionOfAltitude/

Please note “Slider” and dynamic calculations are extremely powerful tools. Mathematica and dynamic analysis certainly could be imbedded in our industry and help us obtain various results both very efficiently and very quickly. Instead of obtaining one result for inputting one value, we can obtain continuous answers by just moving the knob “Slider”.

Using the conservation of mass and the conservation of energy to independently check the accuracy of the amount of the fuel delivered to an underground storage tank(UST). This is an extremely powerful tool and will tell us if the fuel delivered (at the given temperature) is the same amount and at the same temperature as those reported by the truck operator.
This program is called: temp_volume_finder, inputplus_td.txt from jul, 27,09

A topic that seems to come up in just about every NWGLDE meeting is the presence of a crack (orifice) on the side of a UST, and the amount of the liquid that escapes from this hole. This topic also came up in the recent Technical Panel Meeting organized by Battelle. Our computer program answers this question when the height of the fuel, the size of the crack, and some other variables are varied.
Mathematica published this program and it is now online. We are very pleased and honored by having our program published in Mathematica’s Demonstrations Project and we think a lot of engineers, researchers, and field engineers will use it to obtain the exact amount of leakage for various heights, different “crack sizes”, and various coefficient of discharge. To really see this program in action a user needs to have Mathematica installed or download the Mathematica Player. Mathematica Player and all the demos are free and may be downloaded at anytime.
The Demonstration Project may be downloaded from:
http://demonstrations.wolfram.com/FlowOfFluidThroughAHoleInATank/

Note that leakage is a function of height, “h” so above may be applied to both vertical and horizontal tanks.

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