#215466 - 10/17/03 10:19 AM
Why Does the Skokomish Blow Out So Easy
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Reverend Tarpones
Registered: 10/09/02
Posts: 8379
Loc: West Duvall
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It seems like every time we get a good drenching the Skok goes out. Why it more so than other rivers in the area?
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No huevos no pollo.
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#215468 - 10/17/03 10:37 AM
Re: Why Does the Skokomish Blow Out So Easy
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Reverend Tarpones
Registered: 10/09/02
Posts: 8379
Loc: West Duvall
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Aunty: Too funny. I wonder if the TV crews go out every year to ge their, chum swimming across the road shots, or if they just use file footage.
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No huevos no pollo.
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#215469 - 10/17/03 10:53 AM
Re: Why Does the Skokomish Blow Out So Easy
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Returning Adult
Registered: 07/28/99
Posts: 447
Loc: Seattle, WA, USA
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The Skok floods so much because its filling in with excess bottom sediments. During high flows the channels not deep enough and there's no where for the water to go but over the banks. I believe the principal culprit are the Lake Cushman Dams on the North Fork. The dams act to regulate flow on about 50 percent of the basin, substantially lowering peak storm flows, which would blow out excess sediments during the winter. Increased siltation from agriculture and logging likely contributes to the condition as well.
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#215470 - 10/17/03 10:59 AM
Re: Why Does the Skokomish Blow Out So Easy
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Three Time Spawner
Registered: 09/16/02
Posts: 1501
Loc: seattle wa
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the skok floods because of the extensive clear cuttlogging in mason county. so is most of the sediment problems. thats right when all the conservative folks were complaining about logging reform and fighting it, they were helping to wipe out their other resources. pure conservative hypocricy
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"time is but the stream I go a-fishing in"- Henry David Thoreau
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#215471 - 10/17/03 11:10 AM
Re: Why Does the Skokomish Blow Out So Easy
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Reverend Tarpones
Registered: 10/09/02
Posts: 8379
Loc: West Duvall
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PLEASE let's not make this another huge left vs right debate. Whatever you think I'm sure YOU ARE RIGHT!
I wasn't tryinh to start another huge pi####g match, just curious.about why that river get so much grief.
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No huevos no pollo.
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#215472 - 10/17/03 11:32 AM
Re: Why Does the Skokomish Blow Out So Easy
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Three Time Spawner
Registered: 09/16/02
Posts: 1501
Loc: seattle wa
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that was not at all my intent and i hope that the thread does not have to turn into that. it is the truth however and it needs to be pointed out that supporting conservative policies on the environment will come back to bite us and our resources and the skok is a classic example of this. when you get a 100 or a 500 year flood every year... something is wrong. the question was put.. why is something wrong with the skok? and the answer is not one that most conservative like to hear. there is alot of good qualities about the republican party but the truth should not be covered up and the truth is that conservative policies did this to the skok.....
now if i am wrong then i would be happy to discuss timber policy or other environmental policies from mason countyand how it relates to watersheds but it is very difficult to talk policy on the environment without discussing the two opposing viewpoints on the environment.
this is a case that shows clearly that the "jobs vs the environment" mentality is wrong. "the environment is jobs" and a healthy environment creates a healthy economy. mason county would have profited many times more by preserving its salmon and steelhead runs for the future rather than giving in to short sided timber interests.
durring the "spotted owl" years, logging unemployment rose by 15% but durring those same years 25% more trees than ever were cut down. now who was being lied to?
politics and how it relates to fishing and our resources is probably the single most important discussion that the fishing community needs to have.
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"time is but the stream I go a-fishing in"- Henry David Thoreau
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#215475 - 10/17/03 01:04 PM
Re: Why Does the Skokomish Blow Out So Easy
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River Nutrients
Registered: 03/08/99
Posts: 13508
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Surecatch,
There are several reasons the Skok blows out and floods more than almost any other river in our state.
1. Logging. Simpson Timber, through the Reed familiy's Republican political connections (sorry Aunty M) was able to secure a so-called "sustainable yield unit" permit, giving them the right to harvest U.S. national forest timber as though it was part of Simpson's private timberlands in the Skok watershed. The high harvest rates result in sediment loading that is greater than the ability of the river to flush it out to Hood Canal. Consequently, the river channel is aggraded (filled with fines, sand, and gravel), and has a reduced hydraulic capacity, resulting in over-bank flow every time discharge exceeds about 5,000 cfs, which isn't all that much water for the size of the basin.
2. Cushman Dams. The North Fork is dammed by Tacoma and contributes little water to the flooding ~ 60 cfs. Most North Fork water goes straight to Hood Canal via the powerhouse at Potlatch. The North Fork doesn't help flush sediments from the Skok either, but it likely couldn't anyway, due to the next set of problems.
3. Dikes and levees constrain the Skok to a too narrow river channel, so there is no where for high water to go except up and over the banks. And, as mentioned, it only takes 5kcfs to get there. To make the Skok a healthier river, the dikes need to be set back a ways, but that doesn't seem likely, as homes, barns, etc. would be displaced.
4. Highway 101 and other bridges. The bridge abuttments are too close together, causing a backwatering effect during every high water. The backwatering reduces stream velocity, and sediment deposits instead of being flushed out of the system. This keeps the river channel at a low hydraulic capacity, resulting in flooding at relatively low discharges. Each of the bridge crossings needs to be made about twice as wide as they presently are to accomodate higher flows and maintain stream velocity.
One could also blame nature. The compass aspect of the Skokomish watershed is positioned such that it receives very high precipitation across the entire elevation range. This leads to a somewhat higher cfs runoff per square mile of watershed, but this would be scapegoating.
Sincerely,
Salmo g.
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#215477 - 10/17/03 01:58 PM
Re: Why Does the Skokomish Blow Out So Easy
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Spawner
Registered: 12/03/00
Posts: 657
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I was going to say something brilliant and unpolitical like "sheer number of square miles drained" but after researching, it doesn't drain that many miles??
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#215478 - 10/17/03 06:13 PM
Re: Why Does the Skokomish Blow Out So Easy
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Spawner
Registered: 07/04/99
Posts: 727
Loc: tacomca,wa,pierce
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kalama and the noochie are also 2 rivers that recent/on going logging is screwing up! the kalama would rise up but stay pretty clear...they started logging above the upper canyon area now it rains the river is mud,same on the noochie.
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#215479 - 10/17/03 10:30 PM
Re: Why Does the Skokomish Blow Out So Easy
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Returning Adult
Registered: 12/10/02
Posts: 436
Loc: Everett, WA
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As a former Simpson employee I am very familiar with the "sustained use permit" that salmo mentioned. Simpson has tried hard the past few years to do the right thing, but the cutting in the 40's, 50's, and 60's caused so much sediment run off that the river is plugged. Witthout dredging it will never stay in its banks.
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#215480 - 10/17/03 10:53 PM
Re: Why Does the Skokomish Blow Out So Easy
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Returning Adult
Registered: 02/11/03
Posts: 272
Loc: Olympia
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Dikes and levees reduce the amount of room that a river meanders through. Not to mention much of the Reservation is sitting right on the floodplain. Floodplains act as "reservoirs" for excess water. When you have dikes and levees the river is channelized and so heavy rains cause the river to rise rapidly and thus you have flooding.
I'm not familiar with the Skokomish watershed, but was wondering if engineered logjams could help serve as sediment traps. Perhaps the state should buy out land adjacent to the river if possible and rehabilitate the riparian zone.
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#215481 - 10/18/03 01:14 PM
Re: Why Does the Skokomish Blow Out So Easy
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River Nutrients
Registered: 11/07/99
Posts: 2688
Loc: Yelmish
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ltlcleo: i can vouch for the huge fish in the upper river i caught a 14lb bull trout right where the river runs into cushman about 4 years ago
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#215484 - 10/18/03 08:00 PM
Re: Why Does the Skokomish Blow Out So Easy
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Returning Adult
Registered: 11/28/00
Posts: 436
Loc: Drifting Down The Braids Of Sw...
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The bottom line is that it's just another watershed destroyed by human arrogance! The stilly system both north and south forks are headed in the same direction. But what the hell timber is money and money never sleeps. Disgusting but true!
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