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SNODAS data that both use the SNOTEL measurements. In general the SNODAS data range from 10% of the NRCS SNOTEL values in terrain with more plains and 50% of the NRCS SNOTEL values in high mountain terrain. The explanation was the SNODAS model output is spatially continuous representing the entire basin terrain. A recent development for the NRCS in Colorado is adding soil moisture sensors to the SNOTEL sites. This data collection effort is new and the units are water volume fraction that is a volume of air + soil to a volume of water and air in a percent. Soil sensors have criteria for depth settings that are generally set at 2, 4, 8, 20, 40 inches; generally soil saturation is considered to 45%. A discussion with Chris Pacheco at the NRCS yielded that the sensors don't work with completely frozen soils but that is rarely ever a problem. Mr. Steffen Myer of the USBRjoined the discussion and shared that there is another source of data for soil moisture through the agricultural SOIL WETNESS COMPARISON 20001130 12Z communities (CO AG NET) that could assist with data in the plains areas but their focus is soil moisture as it relates to evapo-transpiration. Hunter also posed the NASA Land Data Assimilation System (LDAS) as another potential input for soil moisture to modeling efforts. He showed examples of four different models that create soil mosaics for the U.S w ~40 Hunter also mentioned that SNODAS ro ..J could be linked to a predictive 35 weather model with the capability to 30 forecast out to 72 hours if that is a 25 25 -120 -110 -100 -90 -120 -100 -90 -80 direction we wanted to go in. Longitude Longitude Building on the interest created by the NRCS SNOTEL elevation graphing, the Bureau team and Mr. Bill Badini thought it would be good information to also stratify SNODAS model output in 500 foot elevation increments to determine how much snowpack resides at what elevations for analysis and timing of run off. Doug Cain, of the USGS mentioned that George Leavesly had taken some ofthe SNODAS model output and teamed it with the work he had been doing in Precipitation Runoff Modeling System (PRMS). Mr. Leavesley presented at the April 6, 2005 meeting and the USGS streamflow modeling work was discussed then. The USGS formally requested a meeting with the CWCB and the USBR regarding the USGS assisting with hydrologic modeling for the project. . . . . . . . . . - 8 - 30 25 45 ~i1f' , .11. ,if i/;<. ,.f./lffr ~,~... The blue dots are NRCS enhanced sensors that have soil moisture sensors Next Flood Task Force Meetin2 . The next FTF meeting will be together with the Water Availability Task Force meeting on June 8th at the Division of Wildlife (6060 Broadway), from 1:00 PM - 3:30 PM in the "Big Horn" room in the main DOW building. The CWCB will send out an agenda and a reminder prior to the meeting. Flood Protection . Water Project Planning and Finance. Stream and Lake Protection Water Supply Protection. Conservation Planning