Hydrology/Streams (FeatureServer)

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Service Description: <DIV STYLE="text-align:Left;"><DIV><DIV>Version Updates:TARIv1consisted of a GIS dataset of the aquatic resources (streams and wetlands) in two sub-watershed within the Tahoe basin: Third Creek watershed in Nevada and the Upper Truckee River watershed in California. The maps were developed as part of the Tahoe WRAMP Demonstration Project: a partnership led project to transfer GIS based aquatic resource mapping methodologies to Tahoe agencies, based on the <A href="http://www.sfei.org/baari/methods">Bay Area Aquatic Resources Inventory (BAARI)</A>. The project further developed mapping protocols for sloped wetlands and other aquatic features found in the Sierra Nevada. Two Tahoe agencies were directly involved in the mapping effort including Tahoe Regional Planning Agency (TRPA) and the California Tahoe Conservancy (CTC). The project was funded by the U.S. Environmental Protection Agency (USEPA) and led by SFEI. The Lahontan Regional Water Quality Control Board (RB6) and the State Water Resources Control Board were other project partners. The mapping team employed careful manual interpretation of available remotely sensed aerial imagery and LiDAR (2010) to map the aquatic resources in the two watershed and they conducted field exercises to verify and validate the maps.TARIv2was a semi-automated mapping effort conducted by SIG to more quickly map the remaining aquatic features within the Tahoe Basin (it includes the original TARIv1 data). For streams, their approach consisted of two general phases. In the first phase a proprietary automated method was used to identify likely locations of streams based on areas of high flow accumulation in the 2010 LiDAR. This automated approached worked by filling sinks within the LiDAR-derived DEM, computing the flow direction using the D-Infinity algorithm, then finding stream segments based on areas of high flow accumulation. In the second phase the stream segments were manually reviewed and edited using the 2010 LiDAR and 201 WorldView-2 imagery.For wetlands, mapping was conducted by SIG’s GIS team trained on the TARI mapping standards. They used multi-band Imagery in combination with raster products created from the 2010 LiDAR (DEM, Slope, Aspect, etc) to identify wetlands and aquatic features in the Tahoe Basin. Multiple rounds of reviews were conducted to ensure accuracy and consistency in the data. Additional QAQC were conducted by SFEI.TARIv2.1includes edits and additions to the TARIv2 GIS data to bring it closer in line with the TARI standards laid out in the TARI SOP. The following edits were made by SFEI:Streams:Smoothing of stream linesPlanerizing of stream linesAddition of Strahler stream orderRemoval of first order streams under the minimum mapping unitManual classification of stream networkWetlands:Removal of polygonal sliversMerging of some missing open water featuresSome reclassification of wetlands to further match TARI SOPAdditionally edits were incorporated from input from the City of South Lake Tahoe, and Auerbach Engineering, which was submitted using the CARI editor.Description of Attribute FieldsStreamsWetlandType: coded classification of the stream type. Codes are defined on p5-12 of "TARI Mapping Standards" SourceDataset: source(s) from which the segment was digitized, or otherwise incorporated into TARI.Comments: additional comments about feature designation.ClickCode: simplification of the 'WetlandTyp' attribute used for map database queries in web mapping applications such as http://www.EcoAtlas.orgClickLabel: verbal description of the ClickCode codeLegCode: further simplification of the 'WetlandTyp' attribute used in the legends of web mapping applications such as http://www.EcoAtlas.orgLegLabel: verbal description of the LegCode codeStrahler: Strahler stream order of the stream segment.WetlandsWetlandType: coded classification of the wetland type. Codes are defined on p5-12 of "TARI Mapping Standards" SourceDataset: source(s) from which the wetland polygon was digitized, or otherwise incorporated into TARINotes: additional notes regarding classificationCLICKCODE: simplification of the 'WetlandTyp' attribute used for map database queries in web mapping applications such as http://www.EcoAtlas.orgCLICKLABEL: verbal description of the ClickCode codeNAT_UNNAT: natural vs unnatural designation. Derived from WetlandTypeLEGLABEL: verbal description of the LegCode code LEGCODE: further simplification of the 'WetlandTyp' attribute used in the legends of web mapping applications such as http://www.EcoAtlas.orgOpenWater: open water designation. Derived from WetlandType. “0” for not open water, “1” for open water feature.</DIV></DIV></DIV>

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Streams (0)

Description: <DIV STYLE="text-align:Left;"><DIV><DIV>Version Updates:TARIv1consisted of a GIS dataset of the aquatic resources (streams and wetlands) in two sub-watershed within the Tahoe basin: Third Creek watershed in Nevada and the Upper Truckee River watershed in California. The maps were developed as part of the Tahoe WRAMP Demonstration Project: a partnership led project to transfer GIS based aquatic resource mapping methodologies to Tahoe agencies, based on the <A href="http://www.sfei.org/baari/methods">Bay Area Aquatic Resources Inventory (BAARI)</A>. The project further developed mapping protocols for sloped wetlands and other aquatic features found in the Sierra Nevada. Two Tahoe agencies were directly involved in the mapping effort including Tahoe Regional Planning Agency (TRPA) and the California Tahoe Conservancy (CTC). The project was funded by the U.S. Environmental Protection Agency (USEPA) and led by SFEI. The Lahontan Regional Water Quality Control Board (RB6) and the State Water Resources Control Board were other project partners. The mapping team employed careful manual interpretation of available remotely sensed aerial imagery and LiDAR (2010) to map the aquatic resources in the two watershed and they conducted field exercises to verify and validate the maps.TARIv2was a semi-automated mapping effort conducted by SIG to more quickly map the remaining aquatic features within the Tahoe Basin (it includes the original TARIv1 data). For streams, their approach consisted of two general phases. In the first phase a proprietary automated method was used to identify likely locations of streams based on areas of high flow accumulation in the 2010 LiDAR. This automated approached worked by filling sinks within the LiDAR-derived DEM, computing the flow direction using the D-Infinity algorithm, then finding stream segments based on areas of high flow accumulation. In the second phase the stream segments were manually reviewed and edited using the 2010 LiDAR and 201 WorldView-2 imagery.For wetlands, mapping was conducted by SIG’s GIS team trained on the TARI mapping standards. They used multi-band Imagery in combination with raster products created from the 2010 LiDAR (DEM, Slope, Aspect, etc) to identify wetlands and aquatic features in the Tahoe Basin. Multiple rounds of reviews were conducted to ensure accuracy and consistency in the data. Additional QAQC were conducted by SFEI.TARIv2.1includes edits and additions to the TARIv2 GIS data to bring it closer in line with the TARI standards laid out in the TARI SOP. The following edits were made by SFEI:Streams:Smoothing of stream linesPlanerizing of stream linesAddition of Strahler stream orderRemoval of first order streams under the minimum mapping unitManual classification of stream networkWetlands:Removal of polygonal sliversMerging of some missing open water featuresSome reclassification of wetlands to further match TARI SOPAdditionally edits were incorporated from input from the City of South Lake Tahoe, and Auerbach Engineering, which was submitted using the CARI editor.Description of Attribute FieldsStreamsWetlandType: coded classification of the stream type. Codes are defined on p5-12 of "TARI Mapping Standards" SourceDataset: source(s) from which the segment was digitized, or otherwise incorporated into TARI.Comments: additional comments about feature designation.ClickCode: simplification of the 'WetlandTyp' attribute used for map database queries in web mapping applications such as http://www.EcoAtlas.orgClickLabel: verbal description of the ClickCode codeLegCode: further simplification of the 'WetlandTyp' attribute used in the legends of web mapping applications such as http://www.EcoAtlas.orgLegLabel: verbal description of the LegCode codeStrahler: Strahler stream order of the stream segment.WetlandsWetlandType: coded classification of the wetland type. Codes are defined on p5-12 of "TARI Mapping Standards" SourceDataset: source(s) from which the wetland polygon was digitized, or otherwise incorporated into TARINotes: additional notes regarding classificationCLICKCODE: simplification of the 'WetlandTyp' attribute used for map database queries in web mapping applications such as http://www.EcoAtlas.orgCLICKLABEL: verbal description of the ClickCode codeNAT_UNNAT: natural vs unnatural designation. Derived from WetlandTypeLEGLABEL: verbal description of the LegCode code LEGCODE: further simplification of the 'WetlandTyp' attribute used in the legends of web mapping applications such as http://www.EcoAtlas.orgOpenWater: open water designation. Derived from WetlandType. “0” for not open water, “1” for open water feature.</DIV></DIV></DIV>

Service Item Id: bccf629c25874f489ce100262a59b719

Copyright Text: Spatial Informatics Group, 2015, www.sig-gis.com San Francisco Estuary Institute and Aquatic Science Center, 2016, www.sfei.org Tahoe Regional Planning Agency (TRPA) California Tahoe Conservancy (CTC)

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