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Nahm Lee, 2015/07/09 18:12

I have experience with GIS in open source, Python and R, and Enterprise Esri Python through my water resource projects. Recently, I designed and developed the Flood Forecast System in Santa Clara County, California. Python codes are used to download rainfall raster files from the designated websites and manipulate time stamps of them. Rainfall raster files include gauge- calibrated NEXRAD rainfall and forecasted rainfall data. Python codes are also used to access reservoir data from the MySQL database. With zonal statistics, R scripts are used to obtain sub-watershed rainfall data from the rainfall raster files. In them, the lattice package is used to plot rainfall data. All codes must run by specific sequences and finish within a given time. Ideally, the codes must run every fifteen minutes, but I don't know how to do parallel computing in R. I am interested in rainfall pattern analysis. Rainfall varies in space and time. When I estimate 100 year design flow rates at certain catch points, I use a 100 year design rainfall over an entire watershed and then apply a spatial adjustment formula called area reduction factor which was developed about thirty or forty years ago. The current 100 year design rainfall analysis needs to improve in spatial variation. California is in a severe drought now. I want to conduct a drought study with our District rainfall, stream flow, reservoir stage, and reservoir volume data. With the District's hydrological data, NOAA's computed soil moisture, snow, and temperature data, I think that I have enough information to make a “drought early warning system”. But I don't know where to start. Drought is a spatial temporal variable. Hopefully, I will get some clues through this summer workshop.

My expectations are:

  • Learn how to solve spatial-temporal variable problems.
  • Learn GRASS to delineate watershed boundaries because I depend on Archydro tool to delineate them.
  • Learn R in depth because I picked up R in last summer and I had used only about four months.
  • Learn parallel process in R.
  • Learn BASH in depth.

Nahm Lee

Santa Clara Valley Water District

Ivan Gonzalez, 2015/07/16 00:01

Hi Nahm. I share your desire to use GRASS (and make it in loops) instead ArcGIS to delineate watersheds . I have little experience using parallel computing in R. See you tomorrow!

Danica Taber, 2015/07/13 19:13

Greetings,

I have previous experience in ArcGIS through obtaining a 12-credit community college GIS certificate and associated independent projects that:

 1) Analyzed proposed changes in municipal flood line delineations surrounding buildings at the University of Colorado-Boulder campus, and 
 2) Compared summit elevations and densities between Santa Barbara County, CA and Boulder County, CO. (2011)

I have some familiarity with R through assisting a funded study of drought effects on wildflower phenology over time. (2013)

Next month I'll begin a Masters program in environmental policy and management.

My expectations are:

  • Refresh & expand knowledge of R
  • Develop understanding of GRASS
  • Gain knowledge of other geospatial analysis environments, tools, and methods that may have applications in land management or water policy analysis and development

Thank you,

Danica Taber

MPA/MSES 2017 School for Public and Environmental Affairs Indiana University, Bloomington

Ivan Gonzalez, 2015/07/16 00:24

I have some experience with R, ArcGIS, QGIS, ENVI and Python (calling arpy and qgis libraries). Currently I'm working with biodiversity and land cover analysis but I wanto to move to hydro/meteorological field. I'm looking for a PhD scholarship in order to develop a research that study the relationship with land cover and probabilitie to observe floods/drougths. The hypotesis is that the most conservated the basin is, less probability to observe an extreme event.

My desires ar; - Learn how to make iterative analysis with GRASS (calling GRASS from console or R) - Learn the another new softwares - Make connections for possible publications or collaborative research

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swaqny, 2019/03/28 09:53

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swaqny, 2019/03/28 09:57

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wiki/partecipantexpecsb.txt · Last modified: 2017/12/05 22:53 (external edit)