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snippet: Tulalip reservation intertidal substrate classification based on a modified version of the classification system developed by Aundrea McBride and the Skagit System Cooperative 2015. All data was collected based on field surveys using ESRI’s collector application and aerial photo interpretation. Data was collected from July 2017 through September 2017 and May 2018 through September 2018. Polygons were later edited and additional polygons were created based off aerial photos taken on July 13th, 2018. All polygons were collected or edited based on the July 13th, 2018 imagery with the exception of the portions of the polygons just north of Priest Point that extend farther than roughly 300 feet seaward of the bluff toe. In this area, low tide imagery from 2014 was used.
summary: Tulalip reservation intertidal substrate classification based on a modified version of the classification system developed by Aundrea McBride and the Skagit System Cooperative 2015. All data was collected based on field surveys using ESRI’s collector application and aerial photo interpretation. Data was collected from July 2017 through September 2017 and May 2018 through September 2018. Polygons were later edited and additional polygons were created based off aerial photos taken on July 13th, 2018. All polygons were collected or edited based on the July 13th, 2018 imagery with the exception of the portions of the polygons just north of Priest Point that extend farther than roughly 300 feet seaward of the bluff toe. In this area, low tide imagery from 2014 was used.
accessInformation: Data Collection: Lucas Rabins and Cathy Stanley Classification system development: Cathy Stanley
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description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>##Class boundaries:</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>Many adjacent substrate classes do not have a discrete boundary, but rather a gradient from one class to another. As a result, the boundaries between adjacent classes visible in this dataset are not exact, but rather an estimated midpoint between two mixed classes. </SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>##Class uniformity and data resolution:</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>Within individual polygons, there are often small patches of varying other substrate classes, creating a mosaic of substrate types. To accommodate, any substrate area less than roughly 50 Ft. at its longest side was combined with the closest like class. </SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>##Substrate Classification: </SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>**Diameter of clasts is defined by the longest edge along the clast**</SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>Format: Name - Coded Domain (Long Integer) </SPAN></P><P STYLE="text-indent:20;margin:0 0 11 0;"><SPAN>Description</SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Bedrock – 2</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 11 0;"><SPAN><SPAN>75% of the surface is covered by bedrock of any composition, commonly forming bluffs and headlands.</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 11 0;"><SPAN /><SPAN /></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Boulder – 3</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 11 0;"><SPAN><SPAN>75% of the surface is covered by clasts &gt;256mm in diameter</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 11 0;"><SPAN /><SPAN /></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Cobble – 4</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN>75% of the surface is covered by clasts 64 to 256mm in diameter</SPAN></P><P /><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Coarse gravel – 5 </SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>&gt;75% coarse gravel 16-64mm in diameter</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Coarse gravel with fines – 6</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>&gt;50% coarse gravel and &gt;25% sand and fines, &lt;25% fine gravel &lt;6%cobble</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Mixed gravel – 7</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN>&gt;35% coarse gravel and &gt;35% fine gravel, &lt;10% sand and fines, &lt;6%cobble</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 11 0;"><SPAN /><SPAN /></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Fine gravel – 8</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>&gt;75% fine gravel 4-16mm</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Fine gravel with sand – 9</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>&gt;50% fine gravel and &gt;25% sand and fines, &lt;25% coarse gravel and &lt;6%cobble</SPAN></SPAN></P><P /><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Mixed gravel and fines – 10</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>Roughly equal parts coarse gravel, fine gravel, and sand and fines, &lt;6%cobble</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Cobble with coarse gravel – 11</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>50-75% cobble and &gt;25% coarse gravel</SPAN></SPAN></P><P /><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Coarse gravel with cobble – 12</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>50-75% coarse gravel and &gt;25% cobble</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Mixed coarse – 13</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>Roughly equal parts coarse gravel, fine gravel, and cobble, with no sand and fines</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Mixed course and fines – 14</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>Roughly equal parts cobble, coarse gravel, fine gravel, and sand and fines</SPAN></SPAN></P><P /><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Fines with Gravel – 15</SPAN></SPAN></P><P STYLE="margin:0 0 0 20;"><SPAN><SPAN>Poorly sorted mud, silt, sand, gravel, and cobbles, with no one clast size comprising more than 75% of the surface area. Cobbles and boulders make up more than 6% of the surface area or gravel, cobbles, and boulders combined make up less than 55%. May overlay hardpan in erosional zones with glaciomarine drift or compacted till source material. Usually rich with epibenthic fauna.</SPAN></SPAN></P><P /><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Sand – 16</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>&gt;85% sand</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Sand with fine gravel – 17</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>&gt;60% sand and fines and &gt;25% fine gravel</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Mixed Fines – 18</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 20;"><SPAN><SPAN>Fine sand, silt, and clay comprise 75% of the surface area, with no one size class being dominant. May contain rare gravel (&lt;15%). Cobbles and boulders make up less than 6% of the surface cover. May contain shells. Walkable.</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Mud – 19</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 20;"><SPAN><SPAN>Silt and clay comprise 75% of the surface area. Often anaerobic, with high organics content. Tends to pool water on the surface and be difficult to walk on. May contain minor amounts of very fine sand. </SPAN></SPAN></P><P /><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Organics – 20</SPAN></SPAN></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>Mixed fines or mud with 40% or more visible, intact plant parts in the matrix.</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Artificial – 21</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>Anthropogenic structures replacing natural substrate within the intertidal zone, including boat ramps, jetties, fill, and pilings.</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Driftwood – 22</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>Accumulations of driftwood visible in the air photo where approximately 50% or more of the surface area appears to be wood.</SPAN></SPAN></P><P /><P STYLE="margin:0 0 0 0;"><SPAN>Sand with sand shrimp – 23</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="text-indent:20;margin:0 0 0 0;"><SPAN><SPAN>&gt;85% sand with abundant sand shrimp holes. Difficult to walk on</SPAN></SPAN></P></DIV></DIV></DIV>
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title: Tulalip Reservation Intertidal Substrate Classification
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tags: ["Intertidal","substrate"]
culture: en-US
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minScale: 50000
spatialReference: