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### Re: Hydrogeology C

Posted: **February 9th, 2016, 12:25 pm**

by **Verdigris**

That, and the

Groundwater Foundation's site really is helpful. c:

You also might want to study the aquifers in your area, as the test we took at Regionals had a few questions about Floridian aquifers.

### Re: Hydrogeology C

Posted: **February 12th, 2016, 10:55 am**

by **Panda Weasley**

So. I was just thrown into this event because my partner's previous partner quit. I have absolutely no idea what I'm doing, my partner doesn't know what he's doing, and competition is in 2 weeks.

My questions for you all:

- Which parts should I focus on studying the most?

- Any good websites that give good overviews?

- What is important to put on the cheat sheet?

- Any advice?

Any help would be much appreciated. Thank you.

### Re: Hydrogeology C

Posted: **February 13th, 2016, 6:12 am**

by **Verdigris**

I would recommend studying the Event Guide's contaminant table and remediation table (pages 25-28

here) for Part 3, which is 50% of the score, and practicing the simulation for Part 2 (a practice simulation can be found

here- the simulations at the competitions look basically the same, they just don't have the Check Answer or Show Solution buttons). Part 1 is mostly general information, so I'd recommend looking through

here.
For the cheat sheet, I'd recommend putting the stuff for Part 3 first and foremost, namely types of contaminants and certain remediation techniques. Since this is Regionals, I'd recommend only putting the stuff that they have listed under Regionals for now, to save space. (The Event Guide given only lists what contaminants will be asked about at each level- there's an older version that gives the remediation techniques by level, which I think is listed on the Wiki page.) If you can fit any details for Part 1, do that as well.

As for advice, bring a calculator, and don't rush.

### Re: Hydrogeology C

Posted: **February 16th, 2016, 8:19 am**

by **morgasha000**

Is there any tests I can grab offline or anywhere? I've only been able to find 1 test with the link attached. Does anyone know of practice tests other then the one on the groundwater.org webpage?

https://s3.amazonaws.com/core-products- ... d6866107c0
also considering there is nothing on the test exchange page.

### Re: Hydrogeology C

Posted: **February 16th, 2016, 4:59 pm**

by **Panda Weasley**

Verdigris wrote:I would recommend studying the Event Guide's contaminant table and remediation table (pages 25-28

here) for Part 3, which is 50% of the score, and practicing the simulation for Part 2 (a practice simulation can be found

here- the simulations at the competitions look basically the same, they just don't have the Check Answer or Show Solution buttons). Part 1 is mostly general information, so I'd recommend looking through

here.
For the cheat sheet, I'd recommend putting the stuff for Part 3 first and foremost, namely types of contaminants and certain remediation techniques. Since this is Regionals, I'd recommend only putting the stuff that they have listed under Regionals for now, to save space. (The Event Guide given only lists what contaminants will be asked about at each level- there's an older version that gives the remediation techniques by level, which I think is listed on the Wiki page.) If you can fit any details for Part 1, do that as well.

As for advice, bring a calculator, and don't rush.

Thank you so much for this thorough response. I'm sure I will have more questions once I start studying more.

### Re: Hydrogeology C

Posted: **February 18th, 2016, 6:27 pm**

by **a828545**

For part 3, how do you determine which wells are at risk of contamination and how long it will take for a pollutant to travel to a different well? I can't seem to find anything concrete regarding it.

### Re: Hydrogeology C

Posted: **February 18th, 2016, 8:59 pm**

by **aherthabey**

a828545 wrote:For part 3, how do you determine which wells are at risk of contamination and how long it will take for a pollutant to travel to a different well? I can't seem to find anything concrete regarding it.

Based on my understanding, you have to consider the elevations of the water table at each of the well locations (depends on whether the well is static or pumping). The contaminant should flow from higher elevations to lower elevations, being carried by the groundwater. I haven't had to calculate flow rates yet, but I you would need to use Darcy's Law: V = ki/n where V is the velocity of groundwater, K is the hydraulic conductivity (should be provided to you), i is the gradient of the water table and n is the porosity (should be provided to you). This website should help with Darcy's Law:

http://www.co.portage.wi.us/groundwater ... wmove2.htm

### Re: Hydrogeology C

Posted: **April 25th, 2016, 7:28 am**

by **appleshake123**

I feel like I do great on the groundwater trivia, simulation, remediation, and calculations, but I can never figure out which wells will be affected! In the beginning of the season, we used lower elevation of a well which seemed to work, but not for some tests. Later, my partner and I figured out triangles between all the wells from the central contamination source flow toward similar lines which works for most tests, but not all.

Does anyone have a solution that works? Most of our points loss is due to this and the follow-up question that is based on this.

### Re: Hydrogeology C

Posted: **May 26th, 2016, 2:58 pm**

by **JoJoKeKe**

Hello, everyone!

So I'm going to be participating in this event next year and I'm already confused in the little studying that I've done...

I know that I'll have the hang of it by the end of summer but am still going to need some help. What are some observations you've made in this event and things you wished you knew when you started? When doing the simulation part of the event and using the table to calculate the horizontal velocity of groundwater do you use Ground elevation(G) - Water Table Elevation & Pumping Conditions(P) to find the ideal porosity & conductivity for plugging in Darcy's Law?

I just started this event today so please be patient if I have anything significantly incorrect- I'm still working on understanding everything that has to do with the simulation.

Thanks, JoJoKeKe