Hank Johnson 2011 vector digital data http://water.usgs.gov/lookup/getspatial?redAlderSources_MRB7 Red alder (Alnus rubra) are a common component of forests in Western Oregon and Washington. This file provides an estimate of red alder basal area in western Oregon and Washington for each incremental catchment of the USGS Pacific Northwest SPARROW model. This data set was developed to estimate the contribution of red alder to the in-stream total nitrogen load for the USGS Pacific Northwest SPARROW model. Red alder has been shown to be related to nitrogen fixing (Tree Species Compendium, 2011), an important factor in the SPARROW model. 2008 publication date Complete None planned -129.351779 -109.448056 55.265926 39.745375 None red alder SPARROW model NAWQA USGS inlandWaters None Washington Oregon Columbia River Basin Puget Sound None None The U.S. Geological Survey should be acknowledged as the data source in products derived from these data. U.S. Geological Survey Hank Johnson Hydrologist mailing and physical address

2130 SW 5th Ave.

Portland OR 97201 USA 503-251-3242 503-251-3470 hjohnson@usgs.gov http://water.usgs.gov/GIS/browse/RedAlderSources_MRB7.gif Illustration of Red Alder Basal Area, by Stream Reach, for the Pacific Northwest GIF U.S. Geological Survey Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000 Tree Species Compendium 2011 map http://www.for.gov.bc.ca/hfp/silviculture/Compendium/RedAlder.htm Data are from national-scale inputs and should be considered no better than 1 square kilometer resolution. Data are topologically correct in ArcGIS. Data are complete. The accuracy of geographic sample locations depends on the procedures used by the original sampling program. Refer to source metadata for complete description of input data accuracy. N/A Interagency Mapping and Assessment Project (IMAP) 2008 tabular digital data http://www.fsl.orst.edu/lemma/gnnpac online 2008 publication date LEMMA This project involves developing detailed maps of existing forest vegetation and land cover across all land ownerships in the Pacific Coast States (Oregon, Washington, and parts of California) Downloaded GNN forest composition model maps for modeling regions 6, 7, 8, and 9 from the LEMMA project web site: http://www.fsl.orst.edu/lemma/gnnpac, Accessed August 27, 2008. LEMMA 20080827 Hank Johnson U.S. Geological Survey Hydrologist mailing and physical address

2130 SW 5th Ave.

Portland OR 97201 USA (503) 251-3472 (503) 251-3470 hjohnson@usgs.gov Downloaded a draft version of the GNN forest composition model map for western Washington from the LEMMA project FTP site. Draft version was provided to me by LEMMA project scientist, Matt Gregory. Accessed September 8, 2008. File for model area (gnn_wwa) was separated and distributed as 5 ESRI ArcGIS rasters (mr6_sppba, mr7_sppba, mr8_sppba, mr9_sppba, gnn_wwa). 20080827 Extracted the item containing the red alder basal area density (in square meters per hectare) from each grid using the following commands: setwindow <ingrid> <ingrid> setcell <ingrid> <outgrid> = <ingrid>.alru2 where: <ingrid> = mr6_sppba, mr7_sppba, mr8_sppba, mr9_sppba, gnn_wwa I repeated the above processing steps for each of the source grids, resulting in 5 new grids containing just the red alder basal area density. 20080827 Ran zonal statistics to sum the red alder basal area density for each incremental catchment in the SPARROW model. <outgrid> = zonalstats(mrb7cat_grd, <ingrid>, sum) where: <ingrid> = the five <outgrid> files produced in step 3. mrb7cat_grd = an ArcGIS grid of the incremental catchments of the model that was generated by converting the incremental catchments shapefile provided to us by the National SPARROW modeling team. I repeated the above processing step for each <outgrid> generated in step 3. 20080827 Converted the 5 INFO files generated by the zonalstats function in step 4 to .dbf files using the export command in ArcCatalog. 20080827 Copied the "VALUE" and "SUM" field from each .dbf file generated in step 5 into a Microsoft Excel workbook. Each unique VALUE corresponds to the unique identification number for the incremental catchments in the SPARROW model. For each unique "VALUE", I summed the basal area density from each "SUM" field of the five files generated in step 5. The summed basal area densities were converted to an area by multiplying the value by the area of a grid cell (0.09 ha)." 20080827 The summed basal area densities were converted into a basal area per incremental catchment by multiplying the summed density by 0.09, which was derived from the grid cell size of 30 meters and a units conversion factor. basal area in an incremental catchment (m2) = sum of basal area density (m2/hectare) from step 6 x 1 ha/10,000m2 x 900 m2/grid cell 20080827 The basal area in an incremental catchment was converted into a catchment density by dividing the values calculated in step 7 by the incremental catchment area, in square kilometers. 20080827 Vector NAD_1983_Albers 29.500000 45.500000 96.000000 23.000000 0.00000 0.00000 Coordinate pair 10.00000 10.00000 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 North American Vertical Datum of 1988 0.000100 feet Explicit elevation coordinate included with horizontal coordinates RedAlderSources_MRB7 Red Alder basal area U.S. Geological Survey FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. SHAPE Feature geometry. ESRI Coordinates defining the features. MRB_ID Major River Basin stream reach ID USGS Sequential unique whole numbers that represent reach segment ID. Alder_m2 The red alder basal area in the incremental catchment, in square meters USGS 0 20166.12 square meters Alder_m2_p The red alder basal area density in the incremental catchment, in square meters per square kilometer USGS 0 100.85 meters per square kilometer Area and Area Density of Red Alders within stream reaches (MRB_ID) for the Columbia River Basin and Puget Sound (Major River Basin 7 - MRB7) Downloaded GNN forest composition model maps for modeling regions 6, 7, 8, and 9 from the LEMMA project web site: http://www.fsl.orst.edu/lemma/gnnpac, Accessed August 27, 2008. Files were ESRI ArcGIS raster files: mr6_sppba mr7_sppba mr8_sppba mr9_sppba U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html Downloadable Data Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials. The use of firm, trade, or brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The names mentioned in this document may be trademarks or registered trademarks of their respective trademark owners. shapefile PKZIP compression Winzip 1000 http://water.usgs.gov/GIS/dsdl/RedAlderSources_MRB7.zip None. This dataset is provided by USGS as a public service. 20110404 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+redAlderSources_MRB7 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998