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Daily 024: Millions Monday - Rain Water Calculations

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Summary

First rainy day during school hours. 8-11 check-in announced. Calvin A. enrolled as third new student. Millions Monday calculates Baltimore rainfall equals ~20 days of water usage.

Transcript

0:00 Welcome to Arts and Ideas, in the air, under the tent, and around Baltimore.
0:05 Your daily podcast briefing of what the goings ons at Arts and Ideas Sudbury School.
0:11 So today, I think for the first time this year, we've actually had rain during the day.
0:17 It's more of a mizzle, as it is Monday, but we've had some good, a few good showers here and there.
0:29 So, it's kind of exciting. The tent has been billowing and blowing away.
0:36 I mean, it's still here. And it's just been kind of nice and cozy.
0:41 A little bit cold. I have to say, not everyone who usually is out here is out here,
0:48 but the young ones certainly gave it a good go for quite a number of hours out here.
0:54 So, that's always good to see. And, let's see, we had mandatory announcements today.
1:02 So, let's see, what did we talk about? Oh, on Wednesday, there will be the 8 to 11 check-in.
1:11 So, if you're in that age bracket, you'll need to attend at noon on Wednesday, whether in person or online.
1:18 We also have no school on Friday. So, Friday, don't come into school.
1:26 Let's see, we've got, today we had the discussion in history class about the topic from last week.
1:35 Kind of bikes in the Old West. And then this Wednesday, there will be a two-part thing.
1:42 One will be on Woodrow Wilson's presidency. I believe that will be done by Tage.
1:47 And racing bicycles done by Josh. So, that's all exciting.
1:53 We still haven't quite decided on Article Club. It might be on Thursday.
1:57 I'm pushing forward to just be delayed until next week. But, we shall see.
2:04 What else we got going on? Oh, yes, we had Calvin A. is now enrolled.
2:11 So, he is our third new student to join us this year.
2:16 And we currently have a family of three visiting. And they seem to be having a great time so far.
2:23 So, looking forward to that exit interview. It gets to be on Monday.
2:28 Alrighty. So, that's kind of what's been going on around here. It's been a little bit wet and soggy.
2:34 Oh, we also have a newly cut field. So, that's exciting.
2:39 The rain has made all the little grass clippings stick to everybody's shoes.
2:44 And since we had mandatory announcements under the tent, they certainly all tracked it to every corner of the building.
2:53 So, that'll be fun. I get to clean that up kind of after this. So, that's exciting.
3:00 Alright. So, anyway. It's Millions Monday.
3:09 So, I thought, in honor of the rain, that I'd compute just how much water falls on Baltimore.
3:16 So, think of Baltimore as just one big reservoir.
3:19 And the water that falls is just collecting on the surface of some nicely lined thing spanning the whole area of Baltimore.
3:28 So, how many gallons is that? And how does it compare to how much water people use?
3:35 Well, so, I looked it up and yesterday we got half an inch of rain.
3:43 So, that means, you know, in any particular location you could expect half an inch of water to be accumulated in this reservoir if it was all flat.
3:54 Which it wouldn't be because Baltimore is hilly, which is useful.
3:59 But, anyway. So, what is the area of Baltimore? Well, another Millions Monday. I did that computation.
4:07 But, basically, it's 100 square miles. And there's 5,000 feet in a mile.
4:15 So, that's 25 million square feet in a square mile.
4:23 There's 100 square miles. So, that's, I guess, 2.5 billion square miles.
4:33 Now, a half an inch is 1/24th of a foot. I'm going to say that's 1/25th.
4:44 Alright. Why do I say that? Because 25 million square feet in a square mile times 1/25th of a foot gives me 1 million cubic feet over a square mile.
4:56 And so 100 square miles gives me 100 million cubic feet of water.
5:08 Okay. So, that's a lot. So, how much is that? Well, basically, how many gallons are in a cubic feet?
5:17 Now, when I think about my foot in three dimensions, you know, kind of paste that out, what I see is something that could be like a gallon.
5:27 I was wrong. I mean, it's still within a factor of 10, but it's apparently seven and a half gallons in one cubic foot.
5:36 How this works out is beyond me. All I do know is that humans and volume measurements don't usually go well together.
5:45 Certainly not this human. Anyway. So, we have seven, let's say, yeah, seven and a half gallons in a cubic foot.
5:57 So, we had 100 million cubic feet. And so now we have 750 million gallons of water. Excellent.
6:06 Now, how many gallons of water does a person use in a day?
6:12 Well, basically, toilets and showers take up a lot. There's some doing dishes and, you know, hand washing and, of course, drinking some water, cooking in the water.
6:30 So, it's really hard, again, to compute that volume. I would have gone with 20 gallons. Looking it up, it seems to be more like 80 gallons.
6:43 Let's say 75 gallons. Why did I say 75? Well, because we had 750 million gallons.
6:50 So, divided by that 75, you get 10 million gallons of water. Oh, sorry. 10 million gallons. No. What am I dividing by? I've got 10 million people's worth of water per day.
7:07 Yeah, per day. So, if we had a population of about 500,000. Baltimore's, I think, about 600,000. I'll go with 500,000. Double that, you get a million.
7:24 So, that's two days of people water. What did I say? 10 million. So, another 10. So, maybe 20 days of water usage fell on Baltimore yesterday at a half an inch.
7:43 So, that's what I've come up with. So, that's pretty nice. It's not overwhelming. It's not underwhelming. Seems about right if a lot of that water can actually be captured for drinking water, at least over time.
8:01 Reservoirs and aqueducts, aquifers? Aquifers. And all that good stuff. So, anyway, hope you appreciated all my simplifications.
8:13 And that's it for millions Monday. Have a great rest of your day. Enjoy the rain and the cold. I certainly love it. It's so fun out here.
8:26 And there's some people who joined me under the tent for a bit of lunch. Lunch under the tent in the rain. I can't think of anything better.
8:34 Hope you all can join us at some point. Hope you're having a great day and see you all later.