If my math is right, then the reservoir will hold about five days ur water flow, which frankly is very little. Some very rudimentary tests for the stream flow over the st few months have given me an average flow rate of about 3/4 of a cubic foot per sed. I holy thought it would be higher, but the slope here is so low that the velocity of the stream is quite slow. I recall during the spring rains from before, that the stream was running at a greater depth and velocity, so my estimates for an average are probably quite low. The levee itself has a cross se of 16 square feet, pared to the ten it used to be. Even if flow rate stayed the same, it could handle fifteen times the flow, but the velocity should speed up during a flood, which would drastically increase capacity.
The quarry is being chiseled out of the hillside directly, deepening a small natural valley in the hillside. If it didn't have a natural valley here, the reservoir capacity would be signifitly smaller than it will be. Soon I'll start using stone from the quarry to build the dam for the reservoir as well, which will be a good use for the remaining stone.
I wish I had the ability to stress test the stoo actually do the math on the reservoir dam, to make sure it'll hold up to the pressures it's going to be under, but instead, I'm just going to have to be sure that it's extra strong to hahe pressure of the water. It'll end up looking like a mix between a buttress and gravity dam most likely. I'll of course attach it eo the stone bedrock through the area as well, which should increase its strength drastically.
I recall the romans were able to make retively watertight plug valves from stone, and they made them by hand, so I hope that I make them with the help of magibsp; I'll probably want to use lightstone for them though, rather than any run of the mill stone from the area. The top of the dam will have a regur spillway to prevent topping of the dam. Then at various heights down the dam, I want to make walkways to valve handles so that the water in the dam be lowered to a by opening these valves. I'll have to size the valves accly so that the goblins don't actally flood their own vilge as well.
The equation for the volumetric flow of liquid draining through an outlet is approximately Volumetric flow = Area*(2*gravitational acceleratio)^1/2. Which actually means I actually should determine what the acceleration of gravity is here. Which is a bit of a diversion, but a necessary one.
As long as I define my length of feet using a single ruler for sizing both the valves and the acceleration of gravity, the math will ba. I think the saying goes, it'll be precise, but not accurate. I start by using a foot ruler that I made before, to use as the baseline. Thankfully, I have ahat I already leveled with a water level before, he pavilion floor. I use stone shaping on some stone from the stockpile to make a brick that is six iall. Then I make a seven foot long slightly curved ramp, a everything up on the pavilion floor such that the top of the ramp is at six inches after modifying the briewhat to rest the ramp on.
By rolling a ball down the ramp, I calcute the acceleration down the ramp, and by applying the ratio of the ramp's slope to that acceleratio an approximation fravity. Of course, at this point, my mana is already starting to recharge, so I'll just run trials when I get the ce, and average them out to get a close approximation fravitational acceleration.
Well, after a few days of running trials in my free time, I think I've got a hat should be good enough to use. Approximately 29.2 feet per sed per sed. Slightly less thah had. I ged the ramp heights at times, and adjusted its length a few times, so I'm fairly fident in my number. Now by applying the depth of the reservoir at various heights, I calcute how big the valves' cross seal areas should be. I've also realized that the risk of the goblins flooding their vilge will have to be unicated with them, because there is no way to make one valve size fit all for various heights in the dam. They'll just have tressively open the valve in the lio prevent the valves from eroding due to high velocities if they open a valve too deep.
If I put the valves every five feet of depth, then the cross se would o be about a half a square foot, or a circle with diameter of 0.8. Which would give a flow rate of between 8.5 cubic feet per sed and 3.8 feet per sed depending on how deep the water above each valve is. Which I think is pletely doable, they might need some gears to turhough. The deeper the valve is, the thicker the valve o be as well, which will make it heavier. Yeah, those bottom valves are definitely going to need gears to open.
Well, all of that will be something to deal with when I actually start building the dam. Which is a little ways away yet, since I've still got houses to build, along with roads and a workshop fa. Thinking about it that way, I would really prefer to spend my time up at my mountain cave once I , so the dam and reservht have to wait until year. I'm pretty sure the snow will probably start melting soon, as it has started to feel a little warmer iernoons. So I think I'll focus my efforts on finishing stru in the vilge, and put the reservoir on halt.
Fifteen days have passed since I started fog on just building the goblin vilge, and it's clear that the snow has started to melt on the mountain. The stream is now both deeper and faster flowing now. It's only running at about a foot deep pared to the three foot levee walls, and flowing at 6 cubic feet per sed, with a velocity of nearly double what it used to be. The effect of this has beehan ideal. The dirt I had piled along the levee edges has started to slowly wash away. The previous soil had pnts helping hold it in pce, and acked down. When I refilled the dirt by hand when I built the stone walls to form the levee, I didn't factor this in.
Which means if I get the opportunity, I o do something about it. That something will likely be coating the dirt in a small yer of stoo roof it. It's not ideal, because it'll mean that there won't be pnt life along the stream any longer, but it does mean that the stream will be more manageable.
Stone lining the levee has taken a lot lohan I thought it would. I've only fixed it through the length of the vilge, and halted all other stru to ha. Tomorrow Zaka is going to go summon new imps. I'm going to go along again, but only to up and then e back to finish the pressing stru here. I haven't really checked to see how viable food is up on the mountain this time of year either, so giving it ara month might be a good idea anyway.
We returwo days ter with three moblins. It seems like the buildings at the cave entrance held up fio the snow as well, which is good. I'll o work extra hard for this month to get the houses, roads, wall, kaga's workshop, and the remainder of the levee finished.
Well, another month has passed, and we're supposed to go back up the mountain to summon goblins tomorrow. I haven't quite finished everything I wao finish, but I think it's in a good enough state that I leave the remaining work for winter. There is a little bit of everything that needs finished actually, except for the levee. The walls aren't quite at their full height yet, and I haven't put closable gates i. I've also only pleted thirty-two of the forty houses, and I've only made basic tools fa to work with in his workshop. The roads also don't reach to the openings in the walls yet. I was maybe going to stay for ara month to work on things, but two days ago I ticked over to level 99, so I'd like to be back up on the mountain when I max my level out.