Hydrogeology C

[driedmango]

This question showed up on the UPenn test:
Name the three parts of the classification system the EPA uses for the ground water of the United States.

[appleshake123]

This question showed up on the UPenn test:
Name the three parts of the classification system the EPA uses for the ground water of the United States.

Three Classes (Click to Show Hidden Text)

Class I - [b]Special Ground water[/b]. They are very high valued resources being an important source of drinking water or for the ecosystem, but they are extremely vulnerable to contamination.
 Class II - [b] Current and potential sources of drinking water and water having other beneficial uses[/b]. Groundwater that is in use or potentially available that is not class I is classified as this.  
Class III - [b]Groundwater not a potential source of drinking water and of limited beneficial use[/b]. Groundwater that is contaminated beyond levels of allowed use for drinking  or other beneficial purpose.

Here's the next question. What is TDS and what relation does it have with EPA's groundwater classification.

[Magikarpmaster629]

This question showed up on the UPenn test:
Name the three parts of the classification system the EPA uses for the ground water of the United States.

Three Classes (Click to Show Hidden Text)

Class I - [b]Special Ground water[/b]. They are very high valued resources being an important source of drinking water or for the ecosystem, but they are extremely vulnerable to contamination.
 Class II - [b] Current and potential sources of drinking water and water having other beneficial uses[/b]. Groundwater that is in use or potentially available that is not class I is classified as this.  
Class III - [b]Groundwater not a potential source of drinking water and of limited beneficial use[/b]. Groundwater that is contaminated beyond levels of allowed use for drinking  or other beneficial purpose.

Here's the next question. What is TDS and what relation does it have with EPA's groundwater classification.

TDS is Total Dissolved Solids. It's a measure of how saturated the water is with solids, similar to hardness of water. The EPA puts limits on how high the TDS can be and still be safe for water usage.

[appleshake123]

TDS is Total Dissolved Solids. It's a measure of how saturated the water is with solids, similar to hardness of water. The EPA puts limits on how high the TDS can be and still be safe for water usage.

Correct.

Additionally (Click to Show Hidden Text)

for others, one of the ways to classify  a class III groundwater is  having TDS >10,000 mg/L

[Magikarpmaster629]

What is the piezometric surface of a confined aquifer? How does it differ from the water table?

[Magikarpmaster629]

(anyone still here?)

[18alia]

(anyone still here?)

Now that I'm doing this event for state, I guess I'll start this back up: A piezometric surface, also known as a potentiometric surface, is the elevation to which water in a confined well will rise if a well pierces it. This is different from the water table, which is the natural elevation of groundwater without a well. Now, my question:
What is the difference between porosity and permeability?

[Magikarpmaster629]

(anyone still here?)

Now that I'm doing this event for state, I guess I'll start this back up: A piezometric surface, also known as a potentiometric surface, is the elevation to which water in a confined well will rise if a well pierces it. This is different from the water table, which is the natural elevation of groundwater without a well. Now, my question:
What is the difference between porosity and permeability?

(typically we wait for the question-asker to confirm if we are right before asking the question, but you're fine) Porosity is simply a measure of the percent volume of pore or void space in a rock or soil sample. Permeability is a measure of how easily fluids can pass through the rock or soil sample.

[appleshake123]

(typically we wait for the question-asker to confirm if we are right before asking the question, but you're fine)

I think asking the question directly after answering for a low-participation thread such as this is good. This thread takes forever for some people to comfirm and answer quesitons compared to threads like astronomy.

[Magikarpmaster629]

Alright, I guess since this died I'll take my turn:

List three assumptions made by the hydrogeology challenge, and explain how they fail to predicts groundwater movement in reality.