From: Subject: Streamflow Estimation from Hydrologic Model Assimilation of Remotely Sensed Snow Information in Snowmelt Dominated Basins Date: Sun, 22 May 2005 20:56:30 -0700 MIME-Version: 1.0 Content-Type: multipart/related; type="text/html"; boundary="----=_NextPart_000_0028_01C55F10.BAD7AFA0" X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0028_01C55F10.BAD7AFA0 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Content-Location: http://www.agu.org/cgi-bin/SFgate/SFgate?language=English&verbose=0&listenv=table&application=fm04&convert=&converthl=&refinequery=&formintern=&formextern=&transquery=an%3d%22C31A-0288%22&_lines=&multiple=0&descriptor=%2fdata%2fepubs%2fwais%2findexes%2ffm04%2ffm04%7c1000%7c3727%7cStreamflow%20Estimation%20from%20Hydrologic%20Model%20Assimilation%20of%20Remotely%20Sensed%20Snow%20Information%20%20in%20Snowmelt%20Dominated%20Basins%7cHTML%7clocalhost:0%7c%2fdata%2fepubs%2fwais%2findexes%2ffm04%2ffm04%7c7563660%207567387%20%2fdata2%2fepubs%2fwais%2fdata%2ffm04%2ffm04.txt Streamflow Estimation from Hydrologic Model = Assimilation of Remotely Sensed Snow Information in Snowmelt Dominated = Basins
2004 Fall=20 = Meeting          
Search=20 Results		 Cite = abstracts as=20 Author(s) (2004), Title, Eos Trans. AGU,
85(47), = Fall=20 Meet. Suppl., Abstract = xxxxx-xx
Your query was:
an=3D"C31A-0288"

HR: 0800h
AN: C31A-0288
TI: Streamflow = Estimation from=20 Hydrologic Model Assimilation of Remotely Sensed Snow Information = in=20 Snowmelt Dominated Basins
AU: * = Dressler, K=20 A
EM: kxd13@psu.edu
AF: University of Aizona, Department of Hydrology and Water = Resources, Tucson, AZ 85721 United States
AU: Leavesley, G
EM: george@usgs.gov
AF: United = States=20 Geological Survey, USGS WRD , Denver, CO 80225 United States=20
AU: Bales, R
EM: rbales@ucmerced.edu
AF: University of=20 California, School of Engineering, Atwater, CA 95340 United States =
AU: Fassnacht, S
EM: srf@cnr.colostate.edu
AF: Colorado State=20 University, College of Natural Resources, Fort Collins, CO 80523 = United=20 States
AB: The USGS Precipitation = Runoff=20 Modeling System (PRMS) hydrological model was used to evaluate the = utility=20 of experimental, gridded, 1-km2 snow covered area (SCA) and snow = water=20 equivalent (SWE) products in improving the modeling of snowmelt = runoff=20 from three headwater basins in the Southwestern United Sates. The = SCA=20 product was the fraction of each 1-km2 pixel covered by snow and = was=20 derived from NOAA Advanced Very High Resolution Radiometer = imagery. The=20 SWE product was developed by combining the SCA product with SWE = estimates=20 interpolated from National Resources Conservation Service Snow = Telemetry=20 (SNOTEL) point measurements. An eight-year period (1995-2002) was = used to=20 compare PRMS simulated streamflow generated with and without the = use of=20 the SCA and SWE products. The test basins were the Upper Rio = Grande (3,397=20 km2) in Colorado, and the White (1,634 km2) and Black (1,441 km2) = which=20 are tributaries to the Salt River in Arizona. In model runs using = the SCA=20 and SWE products, PRMS simulated SCA and SWE values were replaced = with the=20 SCA and SWE product values each time step the products were = available. The=20 simulated energy and mass balance states of PRMS were also = adjusted based=20 on the difference between the current model state and the = assimilated=20 estimate. The largest differences between PRMS simulations of SCA = and SWE,=20 and those estimated in the SCA and SWE products, occurred in the = complex,=20 higher elevation terrain. Simulated streamflow using the = assimilated=20 products were as much as 50% less than observed streamflow over = the eight=20 year period. The largest differences between observed streamflow = and that=20 simulated using the assimilated products occurred in the = topographically=20 complex Upper Rio Grande. Differences were smaller in the White = and Black=20 basins. Use of an averaging filter to smooth the SCA and SWE = products=20 prior to assimilation improved simulated streamflow volume, = especially for=20 the Upper Rio Grande basin
DE: 1860 = Runoff and=20 streamflow
DE: 1863 Snow and ice=20 (1827)
DE: 1884 Water = supply
SC: Cryosphere [C]
MN: 2004 AGU = Fall=20 Meeting

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