search for: reservoir

Water engineer here. The standard approach is to 1) get the storage vs. elevation data from the designers of the reservoir or, barring that, 2) get the bathymetry data from USBR or state DWR, or, if available, get the DEM data from USGS if the survey was done before the reservoir was built or 3) get a boat+sonar with GPS? +lots of time and survey the bottom elevation yourself. Put the xyz data into ArcGIS and have...

Dear all; Thank you for your reply. David has explained an interesting method. David I have DEM file of the region and I have extracted the xyz data from that. Also I can extract bathymetry data as xyz file. I have calculated the storage (volume) of reservoir at the current elevation. But the method I have used to calculate the volume is different from your method. I have crop DEM by the reservoir boundary and then calculate the volume. I would be more than happy if you please please explain more or write codes for me how to get volume at different elev...

...of depth-dimension data you describe albeit what may be a very irregular cross section to calculate for areas and thence volumes. If I read it correctly, this can be a very real-world problem worthy of a solution, such as in places like California where they had a tad more rain than usual and some reservoirs may overflow. Someone else provided what sounds like a mathematical algorithm but my guess is what is needed here is perhaps less analytic since there may be no trivial way to create formulas and take integrals and so on, but simply an approximate way to calculate incremental volumes for each hori...

Hi; In the Vorbis 1.1 release notes from July 7, 2004, Monty says "The 1.1 libvorbisenc allows setting the fixed reservoir size (in bits, defaulting to two seconds worth of requested bitrate) and 'hoarding' behavior (whether the encoder tends to keep the bit reservoir more full or more empty) as well as the other encoding heuristics available through the API of 1.0.1." I'm sorry to be so obtuse, but...

Dear all; I have a question about the water level of a reservoir, when the volume changed or doubled. There is a DEM file with the highest elevation 1267 m. The lowest elevation is 1230 m. The current volume of the reservoir is 7,000,000 m3 at 1240 m. Now I want to know what would be the water level if the volume rises to 1250 m? or what would be the water level...

Aside from the fact that the original question might well be a class exercise (or homework), the question is unanswerable given the data given by the original poster. One needs to know the dimensions of the reservoir, above and below the current waterline. Are the sides, above and below the waterline smooth? Is the region currently above the waterline that can store water a mirror image of the region below the waterline? Is the region above the reservoir include a flood plane? Will the additional water go into...

?s 13:27 de 07/04/2024, javad bayat escreveu: > Dear all; > I have a question about the water level of a reservoir, when the volume > changed or doubled. > There is a DEM file with the highest elevation 1267 m. The lowest elevation > is 1230 m. The current volume of the reservoir is 7,000,000 m3 at 1240 m. > Now I want to know what would be the water level if the volume rises to > 1250 m? or what...

Homework? -- Sent from my Android device with K-9 Mail. Please excuse my brevity. On April 7, 2024 8:27:18 AM EDT, javad bayat <j.bayat194 at gmail.com> wrote: >Dear all; >I have a question about the water level of a reservoir, when the volume >changed or doubled. >There is a DEM file with the highest elevation 1267 m. The lowest elevation >is 1230 m. The current volume of the reservoir is 7,000,000 m3 at 1240 m. >Now I want to know what would be the water level if the volume rises to >1250 m? or what woul...

...to quality -1 in 1.0.1 but the quality of the output is improved. 2) New bitrate management code After use case analysis, I concluded that the 'sliding window' approach to bitrate bounding and management in previous encoders was not usefully more featureful than the more standard 'bit reservoir' approach used in the rest of the industry. In addition, the bit reservoir approach uses substantially less memory in the encoder. For these reasons, the 1.1 libvorbisenc moves to implementing bitrate bounding and management by using a bit reservoir. The bit reservoir is also conceptually ea...

...to quality -1 in 1.0.1 but the quality of the output is improved. 2) New bitrate management code After use case analysis, I concluded that the 'sliding window' approach to bitrate bounding and management in previous encoders was not usefully more featureful than the more standard 'bit reservoir' approach used in the rest of the industry. In addition, the bit reservoir approach uses substantially less memory in the encoder. For these reasons, the 1.1 libvorbisenc moves to implementing bitrate bounding and management by using a bit reservoir. The bit reservoir is also conceptually ea...

I'm trying to do AEM eigenfunctions, but I have a different number of points into each reservoir (e.g.: reservoir 1-4 points, reservoir 2-6 points, reservoir 3-2 points....). Can someone help me?Besides this in the Legendre's book exemple in the part:>length.edge<-vector(length=nrow(edges.b))>for (i in 1:nrow(edges.b)){length.edge[i]<-D1.mat[edges.b[i,1], edges.b[i,2]]}There is...

...m My Youtube videos: http://www.youtube.com/user/enmingteo Email: space.time.universe@gmail.com MSN: teoenming@hotmail.com Mobile Phone (SingTel): +65-9648-9798 Mobile Phone (Starhub Prepaid): +65-8369-2618 Age: 31 (as at 30 Oct 2009) Height: 1.78 meters Race: Chinese Dialect: Hokkien Street: Bedok Reservoir Road Country: Singapore _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

...m My Youtube videos: http://www.youtube.com/user/enmingteo Email: space.time.universe@gmail.com MSN: teoenming@hotmail.com Mobile Phone (SingTel): +65-9648-9798 Mobile Phone (Starhub Prepaid): +65-8369-2618 Age: 31 (as at 30 Oct 2009) Height: 1.78 meters Race: Chinese Dialect: Hokkien Street: Bedok Reservoir Road Country: Singapore _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

...work if I do it by hand. Kind of embarassing though, don't you think, introducing an indirection to achieve better code? Thanks, Preston On Wed, Dec 9, 2015 at 9:17 AM, Mehdi Amini <mehdi.amini at apple.com> wrote: > > On Dec 9, 2015, at 9:00 AM, Preston Briggs <briggs at reservoir.com> wrote: > > I suppose your view is reasonable, and perhaps common. > My own "taste" has always preferred machine-independent code > that is as simple as possible, so GEPs reduced to nothing more than an > add, etc, i.e., quite risc-like. Then optimize it to reduce th...

...due to memory lack. Of course, I've tried to remove all "temporary object" during the script execution and to perform a garbage collector ... But it seems to have no effect ... Any idea to solve this problem without an exit from R ? Regards Isabelle Isabelle Zabalza-Mezghani IFP - Reservoir Engineering Department Rueil Malmaison - France

...n selection, taking advantage of available instructions. I guess my whole scheme of using opt in this context is probably wrong headed. Thanks On Wed, Dec 9, 2015 at 8:45 AM, Mehdi Amini <mehdi.amini at apple.com> wrote: > > On Dec 9, 2015, at 7:58 AM, Preston Briggs <briggs at reservoir.com> wrote: > > I'm trying to make the IR "better", in a machine-independent fashion, > without having to do any lowering. > > > The question is “would the IR be more canonical” with the representation > you suggest? Why would the optimizer benefit from this re...

...Dear all; > I am trying to calculate the volume of a polygon shapefile according to a > DEM raster. I have provided some codes at the end of this email.I dont know > if the codes are correct or not. Following this, I have another question > too. > I want to know if the volume of the reservoir rises or doubles, what would > be the elevation? > I would be more than happy if anyone could help me. > Sincerely > > " > library(raster) > library(terra) > library(exactextractr) > library(dplyr) > library(sf) > r <- raster("Base.tif") > p &lt...

Dear all; I am trying to calculate the volume of a polygon shapefile according to a DEM raster. I have provided some codes at the end of this email.I dont know if the codes are correct or not. Following this, I have another question too. I want to know if the volume of the reservoir rises or doubles, what would be the elevation? I would be more than happy if anyone could help me. Sincerely " library(raster) library(terra) library(exactextractr) library(dplyr) library(sf) r <- raster("Base.tif") p <- shapefile("p.shp") r <- crop(r, p) r <-...

...m My Youtube videos: http://www.youtube.com/user/enmingteo Email: space.time.universe@gmail.com MSN: teoenming@hotmail.com Mobile Phone (SingTel): +65-9648-9798 Mobile Phone (Starhub Prepaid): +65-8369-2618 Age: 31 (as at 30 Oct 2009) Height: 1.78 meters Race: Chinese Dialect: Hokkien Street: Bedok Reservoir Road Country: Singapore _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

...m My Youtube videos: http://www.youtube.com/user/enmingteo Email: space.time.universe@gmail.com MSN: teoenming@hotmail.com Mobile Phone (SingTel): +65-9648-9798 Mobile Phone (Starhub Prepaid): +65-8369-2618 Age: 31 (as at 30 Oct 2009) Height: 1.78 meters Race: Chinese Dialect: Hokkien Street: Bedok Reservoir Road Country: Singapore _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users