Inflows

AnglerX · 08-15-2008, 10:24 AM

Lake McConaughy has good inflows right now 763fps. My prediction is we end the season at 3212 about 7' higher than last year!

Elwood is also getting a drink, which only replaces water that been lost due to seepage and evaporation.

Wirenut · 08-15-2008, 10:31 AM

That's good news X, thanks for the info, any water is better than a sandbox.

Ross Juelfs · 08-15-2008, 10:40 AM

3212 is about what I was thinking too. CNPPID projected a low of 3210, but they usually shoot low. The rain events west of us have been helping with the inflows. It sure would be nice to top out around 3230 next spring. Which is still 35 feet lower than full capacity.

OldBaldGuy · 08-15-2008, 11:56 AM

3210?
3212?
That could make a huge difference to a guy wearing XS waders, couldn't it, AnglerX?

Scott Eveland · 08-15-2008, 12:41 PM

A little precip upstream helps, but I think we are also seeing some return flows from upstream irrigation.

Precipitation Analysis Pages

It appears the EA account releases have stopped, and they were going to end the irrigation outflows 8/11 and finish runs with downstream water. Don't know if that happened yet because they haven't updated the Analysis chart since 8/11 (CNPPID Reservoir Elevations & Platte River Flow Data toward the bottom) but I don't think that ~1,200 cfs going out today is all natural flow.

Still good news.

Ready for Wyoming to get plastered with snow again this winter! Plus WY's reservoirs on the N. Platte are at their best levels in a while.

AnglerX · 08-19-2008, 10:19 AM

Hey Ross! We might be off in our prediction, I think we may stay 3214 or maybe a little above now!

Ross Juelfs · 08-20-2008, 10:20 AM

Yep, looks like we both might be wrong on our prediction. Which is fine by me. 1670cfs coming in today.

AnglerX · 08-20-2008, 12:02 PM

Just talked to NGPC biologist and he said Elwood is still getting a little water put in!

Egghead · 08-20-2008, 02:36 PM

Looks like we went to the canal a week too early. This last weekend all the gates were open going into the canal and it was tough to fish below the diversion dam. Didn't know how to effectively fish the canal with that much water going through. Noticed that the water coming into lake Ogallala had a sulfer smell, wondered if the catfish hanging there would have a bad taste. Caught a few cats during the day at ogallala up to 7#. Ended up carp fishing in the corner of the dam at Mac, caught a rudd and a 10 pound carp. Still fun place, probally go back when water flows are lower, like now.

Egghead · 08-22-2008, 03:15 AM

Quote:Noticed that the water coming into lake Ogallala had a sulfer smell, wondered if the catfish hanging there would have a bad taste. That smell comes from hydrogen sulfide in the water coming from McConaughy. Hydrogen sulfide is produced by the decomposition of organic matter. Now that occurs in all waters, but when the water is oxygenated that hydrogen sulfide is rapidly oxidized and thus no rotten egg smell. During the summer, Lake McConaughy is one body of water in Nebraska that does stratify and the lowest layer of relatively cold water has little or no oxygen and therefore the hydrogen sulfide accumulates down there. The water going through the hydropower plant comes from a low level outlet down where the water has little or no oxygen and lots of hydrogen sulfide. Therefore, when that water is released through the hydro-plant it becomes agitated and mixed and the hydrogen sulfide is released to the atmosphere and thus the rotten egg smell. No, it will not make the fish taste bad.Sorry for the limnology lecture.Daryl BauerLakes and Reservoirs Program ManagerNebraska Game & Parks Commissiondaryl.bauer@nebraska.govP.S. Feel free to share this message with others.

08-15-2008, 10:24 AM	#1 (permalink)
AnglerX Member Join Date: Aug 2006 Location: where the shad are.. Posts: 2,479 Thanks: 9 Thanked 25 Times in 10 Posts	Inflows Lake McConaughy has good inflows right now 763fps. My prediction is we end the season at 3212 about 7' higher than last year! Elwood is also getting a drink, which only replaces water that been lost due to seepage and evaporation. __________________ Keeper of the Blue Bucket ...

08-15-2008, 10:31 AM	#2 (permalink)
Wirenut Member Join Date: Aug 2006 Location: At The Water's Edge...Just Outside South Bend Posts: 641 Thanks: 0 Thanked 1 Time in 1 Post	That's good news X, thanks for the info, any water is better than a sandbox. __________________ Cleaning Trash Fish FromThe Pit, One State Record At A Time

08-15-2008, 11:56 AM	#4 (permalink)
OldBaldGuy Member Join Date: Aug 2006 Location: The paradise formerly known as Elkhorn Posts: 5,237 Thanks: 29 Thanked 72 Times in 42 Posts	3210? 3212? That could make a huge difference to a guy wearing XS waders, couldn't it, AnglerX? __________________ “I think every happy memory plucks a hair from your head; if you see an old bald guy, he’s probably had a great life.” –-Red Green

08-15-2008, 12:41 PM	#5 (permalink)
Scott Eveland Member Join Date: Oct 2006 Location: The Water, The West, The Best Posts: 641 Thanks: 4 Thanked 24 Times in 14 Posts	A little precip upstream helps, but I think we are also seeing some return flows from upstream irrigation. Precipitation Analysis Pages It appears the EA account releases have stopped, and they were going to end the irrigation outflows 8/11 and finish runs with downstream water. Don't know if that happened yet because they haven't updated the Analysis chart since 8/11 (CNPPID Reservoir Elevations & Platte River Flow Data toward the bottom) but I don't think that ~1,200 cfs going out today is all natural flow. Still good news. Ready for Wyoming to get plastered with snow again this winter! Plus WY's reservoirs on the N. Platte are at their best levels in a while. __________________ This post was generated on my own computer on my own time. The views expressed herein may or may not necessarily reflect those of my employer. I'm not an expert on anything. I probably am wrong, so don't believe me.

08-19-2008, 10:19 AM	#6 (permalink)
AnglerX Member Join Date: Aug 2006 Location: where the shad are.. Posts: 2,479 Thanks: 9 Thanked 25 Times in 10 Posts	Hey Ross! We might be off in our prediction, I think we may stay 3214 or maybe a little above now! __________________ Keeper of the Blue Bucket ...

08-15-2008, 10:40 AM	#3 (permalink)
Ross Juelfs Member Join Date: Jun 2007 Location: Lake McConaughy Posts: 30 Thanks: 0 Thanked 0 Times in 0 Posts	3212 is about what I was thinking too. CNPPID projected a low of 3210, but they usually shoot low. The rain events west of us have been helping with the inflows. It sure would be nice to top out around 3230 next spring. Which is still 35 feet lower than full capacity.

08-20-2008, 10:20 AM	#7 (permalink)
Ross Juelfs Member Join Date: Jun 2007 Location: Lake McConaughy Posts: 30 Thanks: 0 Thanked 0 Times in 0 Posts	Yep, looks like we both might be wrong on our prediction. Which is fine by me. 1670cfs coming in today.

08-20-2008, 12:02 PM	#8 (permalink)
AnglerX Member Join Date: Aug 2006 Location: where the shad are.. Posts: 2,479 Thanks: 9 Thanked 25 Times in 10 Posts	Just talked to NGPC biologist and he said Elwood is still getting a little water put in! __________________ Keeper of the Blue Bucket ...

08-20-2008, 02:36 PM	#9 (permalink)
Egghead Member Join Date: Jan 2007 Location: Lincoln Posts: 177 Thanks: 0 Thanked 1 Time in 1 Post	Looks like we went to the canal a week too early. This last weekend all the gates were open going into the canal and it was tough to fish below the diversion dam. Didn't know how to effectively fish the canal with that much water going through. Noticed that the water coming into lake Ogallala had a sulfer smell, wondered if the catfish hanging there would have a bad taste. Caught a few cats during the day at ogallala up to 7#. Ended up carp fishing in the corner of the dam at Mac, caught a rudd and a 10 pound carp. Still fun place, probally go back when water flows are lower, like now.

08-22-2008, 03:15 AM	#10 (permalink)
Egghead Member Join Date: Jan 2007 Location: Lincoln Posts: 177 Thanks: 0 Thanked 1 Time in 1 Post	Quote:Noticed that the water coming into lake Ogallala had a sulfer smell, wondered if the catfish hanging there would have a bad taste. That smell comes from hydrogen sulfide in the water coming from McConaughy. Hydrogen sulfide is produced by the decomposition of organic matter. Now that occurs in all waters, but when the water is oxygenated that hydrogen sulfide is rapidly oxidized and thus no rotten egg smell. During the summer, Lake McConaughy is one body of water in Nebraska that does stratify and the lowest layer of relatively cold water has little or no oxygen and therefore the hydrogen sulfide accumulates down there. The water going through the hydropower plant comes from a low level outlet down where the water has little or no oxygen and lots of hydrogen sulfide. Therefore, when that water is released through the hydro-plant it becomes agitated and mixed and the hydrogen sulfide is released to the atmosphere and thus the rotten egg smell. No, it will not make the fish taste bad.Sorry for the limnology lecture.Daryl BauerLakes and Reservoirs Program ManagerNebraska Game & Parks Commissiondaryl.bauer@nebraska.govP.S. Feel free to share this message with others.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode