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Why are rivers deep and lakes shallow in LA, but in NW, rivers are shallow and lakes deep?
Posted on 3/5/24 at 8:47 pm
Posted on 3/5/24 at 8:47 pm
Noticed this when I was in Montana. The lakes are hundreds of feet deep but rivers like 5 ft deep. It's the opposite in LA.
11
Posted on 3/5/24 at 8:52 pm to Saunson69
public school huh?
Posted on 3/5/24 at 9:03 pm to Saunson69
Why do I drive on a parkway, but park on a drive way?
Posted on 3/5/24 at 9:04 pm to Saunson69
None of the lakes in the south are natural.
Posted on 3/5/24 at 9:06 pm to Saunson69
High elevation vs low elevation
Natural lakes up north are glacial lakes while down here they’re either man made by corps of engineers or just low areas/oxbows left when a river changed course. Man made lakes in high elevation areas are made by dams leading to very deep lakes between mountains. Rivers here are deep because they drain all the water from the high elevations up north.
A lot of natural lakes aren’t that deep up north either. If you’ve ever flown low over Minnesota or southern Canada you’ll see a ton of rural glacial lakes are silting in and not much more than swamps
Natural lakes up north are glacial lakes while down here they’re either man made by corps of engineers or just low areas/oxbows left when a river changed course. Man made lakes in high elevation areas are made by dams leading to very deep lakes between mountains. Rivers here are deep because they drain all the water from the high elevations up north.
A lot of natural lakes aren’t that deep up north either. If you’ve ever flown low over Minnesota or southern Canada you’ll see a ton of rural glacial lakes are silting in and not much more than swamps
Posted on 3/5/24 at 9:15 pm to deltaland
quote:
High elevation vs low elevation
Plus, mud bottom vs rock bottom for the rivers I'd think.
Posted on 3/5/24 at 9:47 pm to Saunson69
quote:
The lakes are hundreds of feet deep
I don't know of 100' of water anywhere in Louisiana, deepest spot I've seen is there is some 70' of so in Caney. Toledo may have some deep water (Wiki says 110')
Posted on 3/6/24 at 2:08 am to bbvdd
quote:
None of the lakes in the south are natural.
This is false, I live on the largest natural lake in Arkansas and the largest oxbow in North America.
Posted on 3/6/24 at 5:20 am to Barneyrb
quote:
I don't know of 100' of water anywhere in Louisiana
I believe the Rigolets and Chef pass are some of the deepest waters in Louisiana besides the Mississippi River which is around 200' at Algiers Point
Rigolets has some spots right at 100'
Chef Pass has spots around 80'
Posted on 3/6/24 at 7:21 am to GoAwayImBaitn
Chef Pass between the bridge and Intracoastal shows 95-100' on mine. Between that and the current in that spot im always terrified to break down 
The sediment on the river bottoms down south is lighter and easily carried by flood waters.
The sediment on the river bottoms down south is lighter and easily carried by flood waters.
Posted on 3/6/24 at 7:25 am to Saunson69
When you realize that LA is just a pile of mud dumped by rivers, it makes sense.
Posted on 3/6/24 at 8:42 am to Saunson69
quote:
Why are rivers deep and lakes shallow in LA, but in NW, rivers are shallow and lakes deep?
Posted on 3/6/24 at 8:43 am to Saunson69
Glaciers didn't come all the way to Louisiana.
YouTube - How Do Glaciers Shape the Land https://www.youtube.com/watch?v=loI584OFVpE
YouTube - How Do Glaciers Shape the Land https://www.youtube.com/watch?v=loI584OFVpE
This post was edited on 3/6/24 at 8:48 am
Posted on 3/6/24 at 9:08 am to Saunson69
Shitifino
Posted on 3/6/24 at 9:14 am to Barneyrb
quote:
I don't know of 100' of water anywhere in Louisiana, deepest spot I've seen is there is some 70' of so in Caney. Toledo may have some deep water (Wiki says 110')
The Mississippi River is supposed to be 200’ deep (largest depth on its course) between the bridge and Algiers.
I don’t know of any lakes in this state even get to 100’ deep.
Posted on 3/6/24 at 9:23 am to TC Kidd
quote:
oxbow
aren't most of these a result of man straightening or diverting a river?
Gererally speaking, most lakes in the south are manmade.
Posted on 3/6/24 at 9:30 am to Turnblad85
Most are naturally created through erosion.
quote:
An oxbow lake forms when a meandering river erodes through the neck of one of its meanders. This takes place because meanders tend to grow and become more curved over time. The river then follows a shorter course that bypasses the meander.[3] The entrances to the abandoned meander eventually silt up, forming an oxbow lake
Posted on 3/6/24 at 11:21 am to bbvdd
quote:
None of the lakes in the south are natural.
Lake Okeechobee (and others) say hi.
Posted on 3/6/24 at 11:30 am to Saunson69
Erosion and alluvial sand deposits.
Posted on 3/6/24 at 11:53 am to Barneyrb
quote:
I don't know of 100' of water anywhere in Louisiana
Lake Peigneur
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