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I looked up at the calendar this morning; today marks one year exactly that I started working at Giant Technical Services Firm. And it has been quite a year! I now have a good chunk of work experience under my belt, and a lot of confidence in myself- getting paid for your work imparts a whole new level of job satisfaction.

However, looking into the future it isn't so clear. First off, I feel like I'm not getting quite as much out of this job that I thought I was in terms of learning new things. Sure, there's something different every day, but after a year it's kind of become... almost predictable. I guess that's the hazard behind not changing what you're doing completely each semester, but I'd like to be doing more different things. Right now, it's groundwater sampling, filling in boilerplate on a report, mapping, and navigating byzantine regulatory agencies, with a few interesting projects like JPG or a new well installation every so often. And I hate to say it, but I feel like I can do better.

Second off, my wages aren't keeping pace with inflation. The first raise I got was, frankly, piddly. I deserved much more, and I think my immediate manager knew it, from the big deal he made over it being much more than what a person in my position would normally get. He could have just let it show up on my paycheck, and I wouldn't have questioned it. But... the manager doth protest too much...

Third is the GIS license factor. Despite all the work I do with GIS, I currently do not have a stand-alone license on my work computer. I have to use one of two floating licenses, which wouldn't be so bad if they had purchased enough to allow all the people who use it on any given day to be on at the same time. Not only that, but the license manager often bonks, and doesn't register that people have stopped using the program. Therefore, there's often a line of people waiting to use GIS, and mapping projects get sent to CADD. This results in a lovely little catch-22: to get more GIS licenses, we have to prove its worth to the company by doing more work on it, but with the limited number of licenses and glitchy license manager, we can't all get on to do the work. And whether the managers realize it or not, this tells me that one of the key skill sets I brought to the company isn't worth very much.

Fourth is the newbie factor. I've met some of the new people coming in, and worked closely with one of them. However, she seems to be missing some key concepts in her education, such as, well, pretty much anything to do with geology- true, she's an environmental scientist, but she told me she had about two weeks of geology in her soils class, and can't tell the three rock types apart. It's worrisome. Through her and other situations, I've come to think of her school, Messiah College, as something like the Franciscan University of Steubenville, or Steubie-U, as we used to call it: a third-rate religious-themed private liberal arts school that exists to bilk middle-class conservative Christians out of unfortunate amounts of tuition money. Not that she's not a nice girl and a quick learner, but I am a bit worried about what else she's missing. I'm even more worried that she's referred one of her classmates. True, I don't do too much Actual Geology (TM) in my job right now, but if this is the quality of candidates we're looking at, I'm a bit concerned for the future of the business unit.

Finally, the it's-not-you-it's-me factor. This really isn't what I want to do for the rest of my life. I don't want to go out groundwater sampling every quarter, of course, but I don't want to deal with budgets I can't control, I don't want to deal with setting up contracts, and I really am not enough of a salesman nor do I have any desire to be to do business development. To put it briefly, I am not a corporate tool. I want a job where I can do Actual Geology, drive my own projects, and do a minimal amount of selling myself while doing a fantastic job of selling my ideas- I think I want to be a tenured professor who is not allowed to teach anymore. :) But the point remains- I am not meant to work in the environmental field for the rest of my life, and it's better I admit it to myself now and start making contingency plans.

I am going to more aggressively pursue that state job that I mentioned before, and I'm going to look into other options with the government as well. I may also consider Ph.D. programs, but will probably work another year or so to build up the nest egg enough to put a down payment on a house wherever I go for it. Finally, I'm going to keep doing this job as well as I can until the next best thing comes along- it's what I've got so far, and it's enough to pay the bills until then.
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Monday, September 8: 0900, arrive on site. Mobe to Plant A for site specific training. Find that they are blasting on Tuesday and Wednesday. Regulator is coming but will not arrive until 1100. Go to gauge wells while he is on his way. Discover we have only one set of keys for the well site, and hook it to truck keys.

1000: Hike through waist-deep soybeans to reach a well. Ford a stream and hike through more waist deep soybeans to find the other one. Get a call from regulator halfway there- he is waiting at the quarry and wondering where we are even though he said he wouldn't be there until much later. Take a deep breath and mobe to quarry.

1045: Sign in at quarry. Try to convince regulator that removing the barricades fencing off the unstable highwall and driving to sampling location is A Very Bad Plan, and you should just take the bucket along and walk it instead. Finally get him to agree, to infinite relief when you find cracks in the roadway indicating slumping. Draw the short straw and stand under spring, getting even more water in boots.

It goes on like this for a while... )

Ah, Google

Aug. 14th, 2008 08:34 pm
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"Hi there! I am The Angry Geologist of the Giant Technical Services Firm, and I'm calling on behalf of an independent oil and gas operator who is looking to purchase water for use in drilling and fracking natural gas wells. Does your water supply company have any they would be interested in selling?"

...

"Oh, this isn't Local Water Company? It's a tennis pro shop? I'm sorry to bother you. Have a good afternoon!"





So, how was your day?
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In our line of work, we use a pretty wide variety of bottles for our analyses- there’s ambers for stuff that light will destroy, plastic bottles for metals, and the one we seem to use most often is the volatile organic analysis vial, or VOA for short. VOAs are pretty fragile things, and they have to be filled up just right because they have hydrochloric acid as a preservative. We always order extra when we’re sampling, because one always breaks or you tip the bailer too far and try to dump the whole quart in a quarter pint bottle.

One of these VOAs got ruined at one of our sites. I’m not sure how, they must have overfilled it, or it may have been an extra from an older project. Anyway, my cube neighbor found a way to re-use it, because it’s the perfect size to start something from a cutting. He’s got one growing on top of his file cabinet right now.

He calls it the VOA-dendron.
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I can't really go into specifics. The water hauler that Company T contracted was supposed to get water from cities B, C, and J. I had to have the letters from them saying they were able to sell water to them, and since the water hauler didn't seem to want to help me in a timely manner, I went directly to the cities. As it turns out, City B didn't know what the frak I was talking about. And then the water hauler got honked at me for going over his head.

Sometimes, this business is like being dumped into a room with hungry, poorly socialized chihuahuas while wearing hamburger pants. Your ass is going to get chewed no matter what, but the goal is to make it out without permanent scarring.

Oh, and Happy Independence Day, everyone!
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One of the awesome things about my job is that sometimes I get to see things that a lot of people never even think about.

Take cement. Boring, gray, your house is probably built on it, and you step on it every day. You probably never think about it, one of those icky bits of infrastructure that the general public tend to regard as highly as parasites in an ecosystem. But how it's made...

The heavy machinery in cement plants would make a monster truck fan lose control of his bladder- trucks with tires as tall as I am are required to truck in and move around the limestone from the quarry to the crusher, and over to the kiln. It's mixed with coal and turned in a rotary kiln, a steel tube that you could drive one of these trucks through a few thousand feet long, that spans between two buildings. In this particular plant, the result of this process, called clinker, is slapped on a two-mile conveyor belt to cool on the way to the finishing kiln. I probably haven't gone into half the detail I need to, but the one thing you need to know is that it's incredibly dusty and dirty. The kiln dust and limestone powder gets into and onto everything. I washed my hands for lunch today, and there is now a water line on my hands.

In this area, the limestone is quarried practically on site- there were several active quarries at one point, but two had to be abandoned because they were encroaching on the town. We had to do some water sampling in one, so we drove on the long-abandoned road down to the bottom.

And down...

And down...

A
N
D

D

O

W

N

.
.
.

It took us almost twenty minutes to reach the bottom. On the way down, we saw a deer; apparently there is a breeding population down there, protected from hunters and vehicles in a place with plenty of food and water. It's something that you could imagine speciation in a couple of hundred generations down the line.

One side of the quarry was cut along the dip face of the rock; the others are terraced vertically, but the eastern side just slopes gently down in. They had cut across two cave drainages, which we could see discharging along the slope.

We passed an abandoned rock crusher. The plant environmental manager who was with me said that it wasn't that long ago that it was still in operation, even after the quarry had shut down. Before they built the new one, the trucks used to come across from the other quarry and dump their loads over a cliff a few hundred feet down for it to be moved to this crusher.

We finally reached our sampling site- a small pond in the very deepest part of the pit. It looked small, but as I got close to it, I changed my mind. It was a 20 foot deep pool of the clearest natural water I had ever seen; it was like looking into clear blue-tinted glass. And right in the center of it was this little bass, looking up at us from the other side of the mirror surface.

Even looking back on it now, I can't even put into words how lucky I feel to have been there. Even if it was just a job.
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This one involves some geology, so the explanation is going to get a little long.

We're siting a well in Maryland, and one of our potential sites is in a park next to the MA & PA Heritage trail- actually very pretty down there. The whole thing was in a bit of a depression near a network of streams, and we agreed that this would probably be a good place to look for water.

Now, there is a geomorphological feature called a "kettle" in glacial terrain- it refers to a marshy depression.

I'll bet you can't guess what my boss said. No. Really. Try.

"Too bad we're not in glacial terrain- then we could call this the "Ma and Pa Kettle Site."
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Well, I'm back from Indiana! It was kind of a whirlwind trip- I left Monday, worked my not inconsiderable ass off Tuesday and Wednesday, and flew back Wednesday night. We've got about a year left on the project if nothing goes wrong, so I'll probably be going back out there again. Not the least because of the waders.

To make a long and convoluted story short, we had to do stream gauging out there, and they didn't have a pair of waders that would fit me. Therefore, I had to run out and buy a pair before I left, something I never, ever saw myself doing in my entire life, kind of right up there with inventing my own language. Since I cost them $119.45 on top of everything else, I will probably be heading out there to do the gauging for the duration- not a bad thing.

The site is part of the former Jefferson Proving Ground, a giant swath of land in Southern Indiana that the military bought or eminent-domained, and bombed the shit out of from 1940 to 1995. This is a lot of firepower, and not everything went boom the first time. It's rumored to contain the greatest concentration of unexploded ordinance in the Northern 48 States. We're looking at ways that certain elements from certain weapons could migrate off site (I won't say too much here, but if you go to the JPG website, you could probably figure it out).

Now, the good news is that they couldn't have picked a much better spot in terms of groundwater protection- the limestone contains dissolution fractures to a certain depth, then becomes as crystalline as it gets. The upshot of this is that we don't have to worry about contaminants getting into the deep groundwater system and heading off to Parts Unknown. Pretty much the only way it can get offsite is through the surface water, and that's what we're working on now.

The Army gave/sold the land to the Fish and Wildlife Service, and all but a little bit up North that's still in use by the Indiana National Guard and the bit South of the firing line that's a park, housing, and industrial complex, is now the Big Oaks National Wildlife Refuge. BONWR is about 50,000 acres, so this is nothing to sneeze at. And it is absolutely gorgeous. They do controlled burns to keep the grasslands open, so when I was there the wildflowers were just (ha) exploding. The deer, racoons, and turkeys are isolated enough that they don't yet think that humans= guns or food. They'll run, but not without staring at you for quite a bit wondering what the heck you are. Box turtles, salamanders, snakes and toads run the gravel roads without any fear. The bugs are just as unbelievable*, and I've never seen so many Things in streams, running from freshwater molluscs the size of quahogs, to flatworms, to things with entirely too many legs.

It's pretty much as close to heaven as I can imagine... and then you see the bombs. In the area we were in, which wasn't cleared for public use, they were everywhere. They ranged in size from small ones that would fit in a pint glass to giants longer than your arm and thicker than your leg. That's why they made it a refuge- it would cost billions upon billions of dollars to dispose of the UXO on site, so they just leave it go. There's something to be said about how quickly nature heals itself, but I think the more depressing thought is more true: the only way we can let something be like this, without plastic bottles in the streams, without garbage bags in the trees, without McMansions or McDonalds, is to bomb the shit out of it so that no one can use it for anything else. Perhaps we can look forward to some new Middle East wildlife refuges in the future.

Still, if you're ever stuck in Southern Indiana, this place is worth a trip. Stop in at the Fish and Wildlife office, and go birding, hunting, fishing, amateur archeology-ing, take lots of pictures, and be safe. If I get the chance to revisit, you know I'm going to.

*If you go hiking there, I recommend having a trusted partner check you for ticks afterward. I pulled two lone star ticks off of my person after I got home, and at least one was embedded. Incidentally, I have memorized the symptoms of Rocky Mountain Spotted Fever.
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Just a quick update from the field:

I was down at the motorcycle plant today driving the giant diesel truck with the poly tank on a trailer. We're doing our very first sitewide groundwater sampling, and the boss needed me to fill in for a few days while the rest of the field personnel got back from wherever. I had just finished my last well for the day, and I was headed to the contractor lot. Now, the army reserve barracks is right across from it, and one of the soldiers was sitting on the stoop out front smoking.

He watched me pull that giant trailer into the contractor lot, whip right into a parking space, and kick open the door in my flannel shirt and well-weathered steel toed boots. Then he watched me climb down, look in the side mirror to apply lip gloss, fix my hair, and sit down with my new copy of Country Home.

I don't think I could have caused more chaos in that poor guy's brain unless I had slipped off my boots and pulled on a pair of high heels.
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I finished two reports today. I should be able to send one out tomorrow, and get the other one into typing. It's really kind of cool. One of the sites is in Baltimore, and I think you can see the effect of sea level rise on the groundwater levels in the wells.

***

Dad had his knee replaced on Friday- he ended up only getting a partial instead of a full (which is kind of like saying you "only" had to have bypass surgery and not triple bypass). But he came home today, so I'm going to call them later and see how its going.

***

The check engine light in my car has come on. D: Probably nothing, but I'm getting it checked anyway. I need to meet one of the managers at the mechanic's- not only was he nice enough to tell me where he gets work done on his car, but he offered to give me a ride. Of course, if my car is really going to explode and it will take a few days to fix, I'm calling Enterprise. Not going to take advantage of someone's goodwill like that.

***

Remember the 1400 foot dry hole, and how the property owner called in a dowser to find another spot? Guess what he found? A 700 foot dry hole! Score one for real science! Of course, that means the last site we're trying is do-or-die. And they're drilling tomorrow. Freakin yay.
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So, I finalized most of the figures for the report today- and they all worked, except one: the cross section.

I based my cross section on a variety of sources- the existing geologic maps, some structural measurements and rock descriptions that my boss did, and the drilling logs for the big well. It mostly worked- it shows that one of the wells that we drew down shares a water bearing bedding plane with our well, and better yet, if we just drill him a new one a maximum of a hundred feet deeper down, he won't have any more problems when the production well goes online. However, the other well that we drew down? Not even close.

We have leakage between bedding planes.

This isn't necessarily a bad thing- if we can quantitatively estimate how much water is leaking through, we can get a clearer picture of the recharge area for this well, and possibly get more water out of it. The problem is convincing the regulatory agency that this is indeed what is happening.

Fortunately, there's a neat little mathematical trick that we can use to estimate this. Transmissivity is basically the ease with which water flows through the aquifer to the pumping well, and there are several ways to estimate this. The first two rely on pumping test data from both the pumping and recovery phase, and are estimates of the average transmisivity (these don't always match, so there's a whole new level of agony trying to figure out which number you should use, but fortunately that didn't happen here). The second one you can do if you've drawn down a monitoring well during the test, and that will give you transmissivity in that direction.

We already know that the aquifer is strongly anisotropic- that means that the speed at which water flows through the rock varies greatly depending on which direction it's going. And we have an average value, and two directional values in this case. So, what we can do is construct an ellipse with the transmissivity values and their directions from the well, and that'll give us an estimate of transmissivity in all directions, not just in the directions of wells we know about. From that, we can figure out how long it will take for the water to get to our well, and more importantly, where it's coming from.

Disclaimer: Apparently, this isn't a very common phenomenon- or it is, it's just that the signal from other processes overwhelm it most of the time. But in this formation, it's business as usual- the last time the senior hydrologist had to pull this little trick, it was in the same rock. Go figure.
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[Farnsworth] Good news, everybody! [/Farnsworth]

After sitting down with the staff hydrogeologist, we have figured out why the method I used to determine well efficiency didn't work, and found a method that did!

The method I tried first involved using data from the step test- that's pretty much exactly what it sounds like. You pump at a given rate for an hour, then step up your discharge to find out how the aquifer behaves. There's a mathematical relationship between discharge, drawdown, and the resistance to flow within the aquifer that can be deduced from step test data. I don't understand the physical basis behind this well enough yet to explain it, but under normal circumstances, you can use figure out the percentage of resistance to flow from the aquifer into the well, and get your well efficiency.

There's a number of reasons why it might not have worked in this case. Our initial step might have been too high, and the relationship that should have been linear turned exponential- but we would have only seen the linear part of the curve. Another possibility may be that the well was actually developing itself- clearing debris from the fractures- during the pump test. It probably was the character of the rock more than anything. After doing a little bit of research, we found that the specific capacity (Discharge divided by drawdown) of wells drilled into this formation tended to be remarkably low.

In any case, the hydrogeologist clued me into a second method, one that I can see the physical basis for much more easily, and therefore one that I like. This one uses the recovery period after the constant rate test ends, and as I understand, it goes something like this:

You have a well that you've pumped to approximately steady state, and you have a nice cone of depression going. If you take a cross section of it, you'll find that the water level in the aquifer just outside the well is not the same as the water level inside the casing. This well loss is because water experiences more friction when entering the well. I am not certain why, but I am sure it has something to do with pirates and the Flying Spaghetti Monster. In any case, an efficient well minimizes the difference between the water level outside and the water level inside.

But I'm getting a little ahead of myself. Now, let's shut the pump off. Water that's entering the well will continue to flow at the same rate until it's at the level of the water in the aquifer. That all has to do with gravity- groundwater, like surface water, flows fastest down steeper gradients, so if you have a rolling shallow cone of depression followed by a sharp cliff into the well, guess which one will get filled up faster? This period is fairly quick- a matter of minutes for our well- and after that, recovery is mostly due to water trickling back down the cone of depression until the aquifer recharges completely.

Plotting up a graph of drawdown against T/T' (T- time since test ended, T'- time since test began) yields a curve that looks like an old chair's armrest with a beveled edge. The steep end of the curve toward the end represents the recovery from well loss. The flatter, more linear part of the curve extending to zero drawdown is all due to water trickling back through the formation. After you figure this out, you can divide drawdown due to formation loss at the end of the test by total drawdown, and you'll get your well efficiency.

The verdict? The well is 80-85% efficient. And the better news is now I know where the water is coming from.

And there was much rejoicing!
hertinkness: (Default)
Hammers and screwdrivers are hand tools, and they're both used in conjunction with nails and screws to fasten things together. They work well for their own specific purpose, but you wouldn't want to drive a nail with a screwdriver or vice versa. The analogy fits for a lot of things, but the bit I have in mind is groundwater hydrology.

Tools for Understanding )

Geo-mystics

Mar. 5th, 2008 07:30 pm
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There was a brown bag lunch at work today, where the presenter discussed a new technology for imaging aquifers using a magnetic survey. Now, magnetic surveys are nothing new- you take a magnetometer and go around a grid, measuring the field at each point. They've put such instruments on satellites, as in the mourned, unreplaced MAGSAT. These surveys are limited in that they detect everything contributing to the magnetic field at the surface, from the earth's core to the underground electric cable. But these guys have gotten around it in an ingenious little way to image at the very depth they want: they create an electrical circuit in the aquifer.

As was explained at lunch today, they accomplish this by putting electrodes connected with a wire down two wells anywhere from 500 ft to five miles apart, hooking the assembly up to a small generator, and firing it up. The water in the aquifer conducts the electricity (with varying degrees of efficiency, depending on the concentration of electrolytes within) and creates its own magnetic field, which crews can measure at the surface with a magnetometer; if the aquifer has preferential flow paths, the current will follow them as well. They take the field data back to the lab, and more or less run Monte Carlo simulations varying the resistivity, local magnetic field, etc. until they get something that most closely matches the field data.

This, like most new technologies, is almost prohibitively expensive for the type of work that I do. But the ability to see flow paths is key, whether you're tracing contaminants, looking for the source of a dam seep, or trying to find new groundwater resources. I kind of hope that as it becomes more popular, the cost to do this kind of work will go down.

I also found it hillarious when the MBA that was giving the presentation mispronounced "fast Fourier transform."
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So... yeah...

I finally found a place to get milk in glass bottles- turns out, that shady-ass-looking grocery store on the corner sells organic rBST free milk from cows that eat what they were supposed to eat from a cooperative enterprise. With an insane deposit on the bottles. Who knew?

Big Project is going along well- I've finished most of my part, but something is screwy with someone elses, so I might have to pick up the slack. Whatever keeps the client happy. I want this to stay with us for a very long time, so I can do more cool surface water-groundwater interaction.

It is colder than a welldigger's ass on a windy hill. If you've never been out at a drilling site, rest assured that that is damn cold.

I've started some of the seeds for my garden! I think I'm just going to make it easy on myself, and get pepper and tomato plants that have already been started.

I had a massive headache and unfortunately missed trivia night. Maybe next time...

Oh... yeah... and I haven't told my parents about my dog yet...






Rollin says hi.
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I can't really tell you about the details of this project, but please rest assured that it is made of awesome, and that I am incredibly lucky to get in on it this early in my career.

But what I'm doing for it is working with the surface water on the site- there is [insert nasty element here] from a certain testing activity, and it's our job to make sure it doesn't get off the site. We have controls in place to protect the stream from the certain nasty element (other nasties that pose a fair bit more than an chemical hazard from said testing activities can still get off site, and I KNOW the stream gets enough discharge going to move them, but we are unfortunately not being paid for dealing with them), but the locals are (understandably) concerned about the groundwater- I would be, too. This certain nasty element has a history of behavior unbecoming a heavy metal in the presence of iron and organics. However, the bedrock is... weird. It's fractured limestone, so it's got the whole epikarst thing going on- for you non-speleophiles, that's the semi-weathered limestone that usually is sandwiched between the topsoil and the mostly-unweathered karst aquifer; someone who does soils might call it a regolith, but we geologists are spechul. Anyway, this limestone is fractured, but only to a certain depth- about 30 ft. After that, it's incredibly solid.* Our job is to figure out if most of the water going offsite is passing through these streams, or if it's being transmitted through the aquifer, in which case we'll have a whole other ballgame on our hands.

If you ask me, the easiest way to do this would be dye testing- that's when you inject this bright green unmistakable dye into a well or sinkhole, and look and see where it comes out. However, dye testing is incredibly expensive (not that our client doesn't have enough money), and, well, you try telling well owners that their water might turn day-glo green for a few days when they're already worried about a certain nasty chemical, and see how well that goes over. If you're lucky, it won't involve high-velocity lead poisoning.

So, we're looking at the streams first. The USGS has put out two freeware programs called PART and RORA. PART uses streamflow partitioning (breaking up the hydrograph into its components of precipitation, overland flow, and baseflow or discharge from groundwater) to find the amount of water an aquifer discharges into a stream in a year, month, and quarter. RORA uses the Rorabaugh method-basically fitting curves to the baseflow part of the hydrograph- to estimate groundwater recharge by the stream. The PI wanted me to do this, because his traditional method was separating the hydrograph by graphical means, AKA eyeballing it.

As it turns out though, eyeballing it appears to be the way to go. The programs are spitting out very strange numbers, and I'm starting to wonder if I've found a limitation. These streams are prone to something akin to flash flooding. Their hydrographs look more like urban drainage ditches than anything else- there's a spike when it rains, and then down to almost nothing. I wonder if for the methods to work, you need more than just 2-4 days of hydrograph decay before the next precipitation spike, and we're just not getting that.

Not to mention that our year of measurement included one of the driest summers on record for that county- a drought started in May and didn't let go until the middle of November. Several of our streams, including the big one, had no discharge for the entire month of July.

I'm really not sure what wall I'm hitting here or why, but we appear to get reasonable results for the graphical method. Perhaps hydrograph filtering might be a better way to go about this. I'll see if I can download the program tomorrow.


*I don't use the phrase "solid as a rock" anymore.
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Dear whiny baby.

I understand that you have to leave your house at 3:30 to get to work by 4 AM so that we can drive another 2 hours to Baltimore and sample a truck stop. This sucks. I did not plan this, or we'd be leaving at a decent time. However, the truck stop owner wants us to come this early, so this early we shall come. And my evil boss won't pay for a hotel room for me, so we're stuck. I feel for you having plans to leave early and go kill defenseless animals today, but you know, I had plans too, and they're frakked as well.

This is not the ideal situation. However, if you continue to bitch and moan all the way down like you've been doing so far this week, I will leave you in Baltimore and make you walk home.

STFU,

The Angry Geologist
hertinkness: (Default)
Sometimes, my job is office work, where I sit in my cube all day, making maps, cross sections, and tables for reports.

Sometimes, my job is field work, where I drive around the countryside looking for nice people that might let me put a pressure sensor in their supply well.

And sometimes, I need to call Mike Rowe, because mine is a dirty job.

Today, on Dirty Jobs: )

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