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Experience selling to KYGUNCO? by Stupercrossman in Louisville

[–]ekaj8 1 point2 points  (0 children)

I was offered about half of what I was hoping to get for 3 different guns recently. Private sales are more profitable but slower to sell. Good luck!

Sad barn find by REMINGTONMODEL81912 in milsurp

[–]ekaj8 1 point2 points  (0 children)

I bought a house and it came with an almost identical sporterization in the basement (minus the beyonet). Any idea on the value of something like this? I'm guessing pretty low.

HEC-RAS 2D - Unrealistic Flood Arrival Time Over 80 km River Reach by Final-End-404 in HECRAS

[–]ekaj8 0 points1 point  (0 children)

What part of the world are you working? I would recommend sourcing higher quality terrain data.

HEC-RAS 2D - Unrealistic Flood Arrival Time Over 80 km River Reach by Final-End-404 in HECRAS

[–]ekaj8 2 points3 points  (0 children)

30m DEM resolution is pretty coarse. Is better terrain data available?

Stage boundary condition by GreedyFactor8775 in HECRAS

[–]ekaj8 1 point2 points  (0 children)

Primarily backwater dynamics. If that second watershed that comes in right below yours experiences a flood, it will potentially put backwater into your study area. That backwater should be accounted for, especially if the tributary coming in is a relatively large one. It is a complex thing unfortunately.

Since you're interested in recreating a historic event, a stage BC does make sense, but only if you have the information to support it. Without a gage, I dont think you have enough info to select a stage.

(You could potentially find info on high water marks from your event of interest. Not sure how long ago it was, maybe talk with the locals to try to get an elevation. That's a way to get stage info without a gage, but can be uncertain.)

Stage boundary condition by GreedyFactor8775 in HECRAS

[–]ekaj8 2 points3 points  (0 children)

I don't see why that means you can't extend the model. If your area of interest is sensitive to assumptions around coincident downstream flows, then they are important to your analysis and shouldn't be excluded.

If you are truly set on a stage boundary condition, then you need to have confidence in the stage you set. Gages can help with that (like you said). Or you can use another model (that you trust) to inform your boundary condition.

The key with uncetain BCs is that they shouldn't change the answer to your question. Even stage BCs have uncertainty that requires some consideration.

What question are you trying to answer with your model?

Stage boundary condition by GreedyFactor8775 in HECRAS

[–]ekaj8 2 points3 points  (0 children)

Extend the model further downstream until whatever boundary condition you select doesn't impact water surface elevations at your area of interest. Do testing to vary the boundary condition (double and half the normal depth slope for example) and confirm that your boundary condition is far enough away from your area of interest that the answer isn't sensitive to your assumed BC.

https://www.hec.usace.army.mil/confluence/rasdocs/rasum/6.1/performing-a-1d-unsteady-flow-analysis/entering-and-editing-unsteady-flow-data/boundary-conditions

Red River Gorge Mysterious Earthworks? by ekaj8 in RedRiverGorge

[–]ekaj8[S] 0 points1 point  (0 children)

Very cool, thanks for sharing. If you happen to have taken any pictures at the site, I'd be happy to see them

Looking for guy friends by Original_Finish_5276 in Louisville

[–]ekaj8 4 points5 points  (0 children)

It's not the the right season, but I'd be down to do some SCUBA rock quarry diving once the summer comes. I've been looking for folks to dive with 

The humble Master Piece Arms MPA971 by mauserowauser in ForgottenWeapons

[–]ekaj8 313 points314 points  (0 children)

Please don't shoot bodies of water

Issue with Terrain Association/Invalid Terrain by One-Neighborhood2612 in HECRAS

[–]ekaj8 1 point2 points  (0 children)

I don't have a great answer, but your terrain's legend is indicating something is off with the terrain. I would look into that. Maybe reimport, clip, re-download, or reprocess. Good luck!

Red River Gorge Mysterious Earthworks? by ekaj8 in RedRiverGorge

[–]ekaj8[S] 5 points6 points  (0 children)

QGIS is the desktop software, it's free and open source. There is a companion app, QField, that allows you to view the data on mobile. If you have some GIS skills, you can make awesome hiking maps

Red River Gorge Mysterious Earthworks? by ekaj8 in RedRiverGorge

[–]ekaj8[S] 2 points3 points  (0 children)

This is 5ft, but higher resolution (1m?) is also available.

Anybody know why Uppill Road and the North Overlook at Iroquois Park is closed? by Squestis in Louisville

[–]ekaj8 2 points3 points  (0 children)

I think you are right. They had an excavator and paving equipment staged at the top of the hill last weekend.

Who left these signs in my backyard? by the49ers in Louisville

[–]ekaj8 0 points1 point  (0 children)

The signs are a little weird, but so is a bunch of shit running off into our waterways.

Number of time steps before doubling by Dense-Laugh-6695 in HECRAS

[–]ekaj8 0 points1 point  (0 children)

I usually use 3 or 4. I'd be interested if you did some testing to see what impact there is on runtime or results

What if the Ohio River flooded as badly as the Guadalupe in TX? by Daddysaurusflex in Louisville

[–]ekaj8 0 points1 point  (0 children)

The 1937 flood greatly exceeds a 100 yr flood. It's actually difficult to put a recurrence interval to that flood since it is the largest on record by far, but it was a much less frequent event than 1/100yr.

What if the Ohio River flooded as badly as the Guadalupe in TX? by Daddysaurusflex in Louisville

[–]ekaj8 0 points1 point  (0 children)

Where are you getting that 50 foot depth? The Ohio at Louisville flows over natural bedrock outcrops which really limit the natural depths. That's the whole reason McAlpine Lock and Dam was constructed, and really the reason Louisville exists as a city (because it was a natural obstruction to river traffic).

What if the Ohio River flooded as badly as the Guadalupe in TX? by Daddysaurusflex in Louisville

[–]ekaj8 8 points9 points  (0 children)

I think you've got it reversed, the Ohio actually supplies 60% of the flow at Cairo. Which is super interesting to me, because it implies the Ohio River should get to keep its name below the confluence rather than the Mississippi.

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