Re: [TXWWFF] Flow Rates for Fishability
Gary, A good indicator when you view the sites that have data on stream flow rate is a comparison to the historical flow. That is, if the 'normal' rate is 100 cf/m and the present rate is 400 cf/m, you know the waterway is apt to be challenging. When you know a river and it characteristics, the flow rate becomes much more meaningful since you have a point of comparison to what you've experienced before. Graham - Original Message - From: "Gary Miller" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, June 04, 2004 6:20 AM Subject: Re: [TXWWFF] Flow Rates for Fishability > Makes all the sense in the world, Jack. So I'm thinking the velocity, not > the volume of water is what we're looking for as wading anglers. I guess > calling ahead to check out the river conditions is the way to go rather > than relying on a cfs chart. > > - Gary > > At 10:50 PM 6/3/04, you wrote: > > >Gary > > > >I hope I'm not insulting your intelligence here, but cfs means cubic feet > >per second. That's the (number of) cubic feet of water that passes a > >given point in the river in One second. As a fur instance, suppose you > >have a riverbed with a cross section of 100 square feet, ie 1 foot deep > >and a hundred across, or 2 and 50, etc. A flow rate of 100 cfs means that > >100 cubic feet of water goes past in one second, or the river is flowing > >at 1 foot per second. Pretty easy fishing. At 500 cfs this same section > >of riverbed would have a speed of 5 feet per second. Just try and stand > >up in that! Going the other way, a 100 cfs flow on a streambed with a > >cross section of only 20 sq ft would have the 5 foot per second > >speed. Back in undergraduate studies, we had to measure just this - > >guesstimate the cross section of the river by taking depth measurements > >and width measurements, then measuring the flow by letting something drift > >in the current for a set period of time and tape measuring it. > > > >What I'm trying to say here is that cfs by itself doesn't tell me anything > >significant. You need to know the shape of the river at the point you are > >fishing. I know that the Guadalupe is pretty easy wading at 200 cfs, and > >very tricky to dangerous at 500. Actually, thinking about it, the Guad > >would be pretty close to your hypothetical 100 sq ft cross section most > >places I wade. Some are wide and shallow, others up to hip deep and > >narrow. The really big holes (very large cross section) would have a > >greatly reduced flow speed, but the cfs rate would still be the same. And > >as the cfs goes up, the depth, hence the cross section goes up. When the > >Guad was running at 135,000 cfs a couple of years ago, the depth was > >probably up around 50 feet in places, and width a quarter mile. > > > >Clear as mud yet, or want me to confuse you some more? > > > >Jack > >Austin > >Gary Miller wrote: > > > >>For those of you who are savvy about such things, what is an acceptable > >>flow rate for wade fishing in rivers and streams? I want to know such > >>things as maximum flow rate for safe wading, drifting, etc. > >> > >>Thanks. > >> > >>- Gary > >> > >>. > >>. > >>. > >>For "unsubcribe" instructions, send an e-mail to > >>[EMAIL PROTECTED] > > > >. > >. > >. > >For "unsubcribe" instructions, send an e-mail to > >[EMAIL PROTECTED] > > > > > > > > > > > >--- > >Incoming mail is certified Virus Free. > >Checked by AVG anti-virus system (http://www.grisoft.com). > >Version: 6.0.688 / Virus Database: 449 - Release Date: 5/18/04 > . . . For "unsubcribe" instructions, send an e-mail to [EMAIL PROTECTED]
Re: [TXWWFF] Flow Rates for Fishability
Makes all the sense in the world, Jack. So I'm thinking the velocity, not the volume of water is what we're looking for as wading anglers. I guess calling ahead to check out the river conditions is the way to go rather than relying on a cfs chart. - Gary At 10:50 PM 6/3/04, you wrote: Gary I hope I'm not insulting your intelligence here, but cfs means cubic feet per second. That's the (number of) cubic feet of water that passes a given point in the river in One second. As a fur instance, suppose you have a riverbed with a cross section of 100 square feet, ie 1 foot deep and a hundred across, or 2 and 50, etc. A flow rate of 100 cfs means that 100 cubic feet of water goes past in one second, or the river is flowing at 1 foot per second. Pretty easy fishing. At 500 cfs this same section of riverbed would have a speed of 5 feet per second. Just try and stand up in that! Going the other way, a 100 cfs flow on a streambed with a cross section of only 20 sq ft would have the 5 foot per second speed. Back in undergraduate studies, we had to measure just this - guesstimate the cross section of the river by taking depth measurements and width measurements, then measuring the flow by letting something drift in the current for a set period of time and tape measuring it. What I'm trying to say here is that cfs by itself doesn't tell me anything significant. You need to know the shape of the river at the point you are fishing. I know that the Guadalupe is pretty easy wading at 200 cfs, and very tricky to dangerous at 500. Actually, thinking about it, the Guad would be pretty close to your hypothetical 100 sq ft cross section most places I wade. Some are wide and shallow, others up to hip deep and narrow. The really big holes (very large cross section) would have a greatly reduced flow speed, but the cfs rate would still be the same. And as the cfs goes up, the depth, hence the cross section goes up. When the Guad was running at 135,000 cfs a couple of years ago, the depth was probably up around 50 feet in places, and width a quarter mile. Clear as mud yet, or want me to confuse you some more? Jack Austin Gary Miller wrote: For those of you who are savvy about such things, what is an acceptable flow rate for wade fishing in rivers and streams? I want to know such things as maximum flow rate for safe wading, drifting, etc. Thanks. - Gary . . . For "unsubcribe" instructions, send an e-mail to [EMAIL PROTECTED] . . . For "unsubcribe" instructions, send an e-mail to [EMAIL PROTECTED] --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.688 / Virus Database: 449 - Release Date: 5/18/04
Re: [TXWWFF] Flow Rates for Fishability
Gary I hope I'm not insulting your intelligence here, but cfs means cubic feet per second. That's the (number of) cubic feet of water that passes a given point in the river in One second. As a fur instance, suppose you have a riverbed with a cross section of 100 square feet, ie 1 foot deep and a hundred across, or 2 and 50, etc. A flow rate of 100 cfs means that 100 cubic feet of water goes past in one second, or the river is flowing at 1 foot per second. Pretty easy fishing. At 500 cfs this same section of riverbed would have a speed of 5 feet per second. Just try and stand up in that! Going the other way, a 100 cfs flow on a streambed with a cross section of only 20 sq ft would have the 5 foot per second speed. Back in undergraduate studies, we had to measure just this - guesstimate the cross section of the river by taking depth measurements and width measurements, then measuring the flow by letting something drift in the current for a set period of time and tape measuring it. What I'm trying to say here is that cfs by itself doesn't tell me anything significant. You need to know the shape of the river at the point you are fishing. I know that the Guadalupe is pretty easy wading at 200 cfs, and very tricky to dangerous at 500. Actually, thinking about it, the Guad would be pretty close to your hypothetical 100 sq ft cross section most places I wade. Some are wide and shallow, others up to hip deep and narrow. The really big holes (very large cross section) would have a greatly reduced flow speed, but the cfs rate would still be the same. And as the cfs goes up, the depth, hence the cross section goes up. When the Guad was running at 135,000 cfs a couple of years ago, the depth was probably up around 50 feet in places, and width a quarter mile. Clear as mud yet, or want me to confuse you some more? Jack Austin Gary Miller wrote: For those of you who are savvy about such things, what is an acceptable flow rate for wade fishing in rivers and streams? I want to know such things as maximum flow rate for safe wading, drifting, etc. Thanks. - Gary . . . For "unsubcribe" instructions, send an e-mail to [EMAIL PROTECTED] . . . For "unsubcribe" instructions, send an e-mail to [EMAIL PROTECTED]
RE: [TXWWFF] Flow Rates for Fishability
Gary, the best bet is to check the canoe and kayak websites, they link to a variety of other websites that rate the stream flow in terms of paddling. If it ain't got enough water to float, access will be laborious and the fishing will most probably be poor. L. C. Clower 6925 Conestoga Dr. Rowlett TX 75089 972-463-5126 mailto: [EMAIL PROTECTED] Yahoo!Messenger: lcclower2431 AOL IM: Lcclower -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Gary Miller Sent: Thursday, June 03, 2004 6:33 PM To: [EMAIL PROTECTED] Subject: Re: [TXWWFF] Flow Rates for Fishability My reason for asking is for those times when you are thinking about travelling to a river that you are unfamiliar with. Checking the flow chart might give an indication of whether you should bother to make the trip or not. At 05:16 PM 6/3/04, you wrote: >I know if it's safe as soon as I see it. If not then, when I get in it. I >know that's not the answer you're looking for but I think there are way to >many variables to be able to say what's safe or not depending on the river. > >Roger >- Original Message - >From: "Gary Miller" <[EMAIL PROTECTED]> >To: >Sent: Thursday, June 03, 2004 11:17 AM >Subject: [TXWWFF] Flow Rates for Fishability > > > > For those of you who are savvy about such things, what is an acceptable > > flow rate for wade fishing in rivers and streams? I want to know such > > things as maximum flow rate for safe wading, drifting, etc. > > > > Thanks. > > > > - Gary > > > > . > > . > > . > > For "unsubcribe" instructions, send an e-mail to > > [EMAIL PROTECTED] > > > >. >. >. >For "unsubcribe" instructions, send an e-mail to >[EMAIL PROTECTED] > > > >--- >Incoming mail is certified Virus Free. >Checked by AVG anti-virus system (http://www.grisoft.com). >Version: 6.0.688 / Virus Database: 449 - Release Date: 5/18/04 . . . For "unsubcribe" instructions, send an e-mail to [EMAIL PROTECTED]
Re: [TXWWFF] Flow Rates for Fishability
My reason for asking is for those times when you are thinking about travelling to a river that you are unfamiliar with. Checking the flow chart might give an indication of whether you should bother to make the trip or not. At 05:16 PM 6/3/04, you wrote: I know if it's safe as soon as I see it. If not then, when I get in it. I know that's not the answer you're looking for but I think there are way to many variables to be able to say what's safe or not depending on the river. Roger - Original Message - From: "Gary Miller" <[EMAIL PROTECTED]> To: Sent: Thursday, June 03, 2004 11:17 AM Subject: [TXWWFF] Flow Rates for Fishability > For those of you who are savvy about such things, what is an acceptable > flow rate for wade fishing in rivers and streams? I want to know such > things as maximum flow rate for safe wading, drifting, etc. > > Thanks. > > - Gary > > . > . > . > For "unsubcribe" instructions, send an e-mail to > [EMAIL PROTECTED] > . . . For "unsubcribe" instructions, send an e-mail to [EMAIL PROTECTED] --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.688 / Virus Database: 449 - Release Date: 5/18/04
Re: [TXWWFF] Flow Rates for Fishability
I know if it's safe as soon as I see it. If not then, when I get in it. I know that's not the answer you're looking for but I think there are way to many variables to be able to say what's safe or not depending on the river. Roger - Original Message - From: "Gary Miller" <[EMAIL PROTECTED]> To: Sent: Thursday, June 03, 2004 11:17 AM Subject: [TXWWFF] Flow Rates for Fishability > For those of you who are savvy about such things, what is an acceptable > flow rate for wade fishing in rivers and streams? I want to know such > things as maximum flow rate for safe wading, drifting, etc. > > Thanks. > > - Gary > > . > . > . > For "unsubcribe" instructions, send an e-mail to > [EMAIL PROTECTED] > . . . For "unsubcribe" instructions, send an e-mail to [EMAIL PROTECTED]
Re: [TXWWFF] Flow Rates for Fishability
Howdy, My brother is in civil engineering and he said it depends on depth and width of the river to calculate a velocity. However velocity is only half the issue, your ability to safely stand a particular current is directly effected by it's depth. I.E. if it's only a few inches deep you can safely stand a fairly high flow rate, but if it's up to your chest it doesn't take much to push you off your feet. I tried to get a formula that reflected this, but he wouldn't be pinned down. Gary Miller <[EMAIL PROTECTED]> wrote: For those of you who are savvy about such things, what is an acceptable flow rate for wade fishing in rivers and streams? I want to know such things as maximum flow rate for safe wading, drifting, etc.Thanks.- Gary...For "unsubcribe" instructions, send an e-mail to[EMAIL PROTECTED]YBIC,Scott><)))> Do you Yahoo!?Friends. Fun. Try the all-new Yahoo! Messenger
