search for: hydrolog

Hello world, I am actually transferring a course in data management for students in biology, geography and agriculture from statistica to R - it works surprisingly well. If anyone is interested in my scratch/notepad (in German language), please see www.hydrology.uni-kiel.de/~schorsch/statistik/statistik_datenauswertung.pdf (pages 40-52) The dataset is: www.hydrology.uni-kiel.de/~schorsch/statistik/erle_stat.csv It contains a 10 year dataset. So far for introduction, now comes the problem: we often need cumulative *annual* sums (sunshine, precipitatio...

Hi, a new package ?HBV.IANIGLA? for hydrological modeling has been relesased. CRAN: [ https://cran.r-project.org/web/packages/HBV.IANIGLA/index.html | https://cran.r-project.org/web/packages/HBV.IANIGLA/index.html ] In case of doubts do not hesitate to write. Best, Ezequiel Toum -- Ezequiel Toum Ingeniero Civil Becario Doctora...

Hi, a new package ?HBV.IANIGLA? for hydrological modeling has been relesased. CRAN: [ https://cran.r-project.org/web/packages/HBV.IANIGLA/index.html | https://cran.r-project.org/web/packages/HBV.IANIGLA/index.html ] In case of doubts do not hesitate to write. Best, Ezequiel Toum -- Ezequiel Toum Ingeniero Civil Becario Doctora...

Dear R and hydrological community, The first public (beta) release of two new R packages are now available on CRAN: ############ # hydroTSM # ############ 1) hydroTSM is a package for management and analysis of hydrological time series: http://cran.r-project.org/web/packages/hydroTSM/ hydroTSM includes S3 functi...

Dear R and hydrological community, The first public (beta) release of two new R packages are now available on CRAN: ############ # hydroTSM # ############ 1) hydroTSM is a package for management and analysis of hydrological time series: http://cran.r-project.org/web/packages/hydroTSM/ hydroTSM includes S3 functi...

Hello, In R I am trying to use Kalman filtering to find a solution for an hydrological problem. With Kalman Filtering I want to estimate the discharge comming from three storage bassins. I have programmed a function in R which can run KalmanSmooth. When I'm asking for the function and putting in values, R detects the following error: "Error in as.vector(data) : Argument...

...I can get the frequencies and the period). I tried the spectrum() and pgram() functions, but did not find a way through... The final aim would be to get the periodogram (and the residuals from the reassembled data set...) Thanks and greetings, Georg The data set: air = read.csv("http://www.hydrology.uni-kiel.de/~schorsch/air_temp.csv") airtemp = ts(T_air, start=c(1989,1), freq = 365) plot(airtemp) -- Georg Hoermann, Dep. of Hydrology, Ecology, Kiel University, Germany +49/431/23761412, mo: +49/171/4995884, icq:348340729, skype: ghoermann

Dear R developers, Due to the increasing use R in hydrology and other close-related environmental sciences, I would like to ask if it would be possible to create a new Special Interest Group mailing list, called 'R-sig-hydro', specially devoted those topics. If possible to do so, I'd offer myself to maintain such mailing list (if needed)....

Hello, I am trying to create a plot often seen in hydrodynamic work than includes a contour plot representing the water speed with arrows pointing in the direction of flow. Does anyone have any idea how I might add arrows based on wf$angle (in the example below) to the plot below? Thanks in advance! Sam library(lattice) speed <- runif(100, 0, 20) wf <- data.frame(speed) wf$width <-

Dear all, I wonder if anyone can help me with specifying a right model for my analysis. I am a beginner to lme methods. I was unfortunately not able to find a solution to my problem on my own. Data structure: I have sampled monthly 6 basins during two hydrological cycles, and I have taken several (2 to 4) samples (“replicate”) for each basin and month. I’m trying to relate Shannon diversity to some environmental variables, taking away pseudoreplication. Thus, I have tried an lme model with “time” and “basin” as random factors. I have put hydrological cyc...

Hello, I'm working with a series (30+) of hydrologic metrics and 10 vegetation communities and I need to determine which of the metrics provide the best separability for each of the vegetation communities. The hydrologic metrics are highly correlated, therefore the need to reduce the number of them considered is critically important. I've bee...

Dear R users and hydrological/environmental community, I'm glad to announce that a major (and recommended) update for the packages hydroTSM and hydroGOF are now available on CRAN: -) hydroTSM: http://cran.r-project.org/web/packages/hydroTSM/ -) hydroGOF: http://cran.r-project.org/web/packages/hydroGOF/ ############...

...e are numerous example.*() functions. I can access Splus with a command line but can't open a graphics window, so I can't to execute the example.*() functions. Is there a way I could get the associated script without generating the plot? Thanks, Scott Waichler, Senior Research Scientist Hydrology Group/Environmental Technology Division Battelle Pacific Northwest National Laboratory (email) scott.waichler at pnl.gov (web) http://hydrology.pnl.gov ________________________________________________ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing l...

Dear R users and hydrological/environmental community, I'm glad to announce that a major (and recommended) update for the packages hydroTSM and hydroGOF are now available on CRAN: -) hydroTSM: http://cran.r-project.org/web/packages/hydroTSM/ -) hydroGOF: http://cran.r-project.org/web/packages/hydroGOF/ ############...

...os mingw32 system i386, mingw32 status major 1 minor 5.1 year 2002 month 06 day 17 language R Rajiv -------- Rajiv Prasad Postdoctoral Research Associate, Hydrology Group Pacific Northwest National Laboratory, P.O. Box 999, MSIN K9-33 Richland, WA 99352 Voice: (509) 375-2096 Fax: (509) 372-6089 Email: rajiv.prasad at pnl.gov -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.a...

Hi Eric, How about match( TRUE, cumsum(hyd/sum(hyd)) > .5 ) - 1 HTH, Eric On Sat, Dec 16, 2017 at 3:18 PM, Morway, Eric <emorway at usgs.gov> wrote: > The small bit of script below is an example of what I'm attempting to do - > find the day on which the 'center of mass' occurs. In case that is the > wrong term, I'd like to know the day that essentially cuts

...gt; OneYr <- Daily[Daily$waterYear==wyrs[i], ] > mid <- com(OneYr$Q) > if(i==1){ > midPts <- as.Date(OneYr$Date[mid]) > } else { > midPts <- c(midPts, as.Date(OneYr$Date[mid])) > } > } > > > > Eric Morway > Research Hydrologist > Nevada Water Science Center > U.S. Geological Survey > 2730 N. Deer Run Rd. > <https://maps.google.com/?q=2730+N.+Deer+Run+Rd.Carson+City,+NV+89701+(775&entry=gmail&source=g> > Carson City, NV 89701 > <https://maps.google.com/?q=2730+N.+Deer+Run+Rd.Carson+Cit...

...p-Prof SP1 und SP2 (domain-login) and XP-Home (no domain login). Any hints what I should do? (I am no samba expert - until now it just worked) (bugreport to debian is submitted, 3.0.6-2 did not solve the problem) Thanks & Gruss Georg -- Georg Hoermann, Fachabteilung Wasserwirtschaft / Dep. Hydrology Ecosystem Research Center, Kiel University, Germany Tel. 0431-880-1207, Home: 0451/477032, 0172/4315715, Penguin #189476

The small bit of script below is an example of what I'm attempting to do - find the day on which the 'center of mass' occurs. In case that is the wrong term, I'd like to know the day that essentially cuts the area under the curve in to two equal parts: set.seed(4004) Date <- seq(as.Date('2000-09-01'), as.Date('2000-09-30'), by='day') hyd <-

Hello, I am trying to define a different interval for a "year". In hydrology, a "water year" is defined as the period between October 1st and September 30 of the following year. I was wondering how I might do this in R. Say I have a data.frame like the following and I want to extract a variable with the water year specs as defined above: df<-data.frame(Date=s...