Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.
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Transcript of Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.
![Page 1: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/1.jpg)
Applied Linear Referencing Mapping Salinity in the South Old River
Aaron Cuthbertson, ES, O&MBarry Montoya, Staff ES, O&M
![Page 2: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/2.jpg)
SWRCB has set salinity objectives for the South Delta
South Old River at times exceeds salinity objectives set by SWRCB
The objective of the study is to gain a better understanding of the sources of salinity in the South Old River
Background – Salinity in SOR
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Background – Salinity in SOR
Lead Scientist – Barry Montoya
Began doing transects of SOR in 2009
Salinity is typically measured by Electrical Conductivity (EC) – the more conductive a solution is, the saltier. Seawater conducts electricity very well; distilled water conducts very poorly.
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Background – Sampling Equip
6 MPH
EC Sensor
GPSDatalogger
![Page 5: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/5.jpg)
Background – Transect route
![Page 6: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/6.jpg)
Background – Lots of Data
Many transects recorded
Under different tidal conditions
During different times of the year
![Page 7: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/7.jpg)
Problem – GPS (XY) Coordinates
How do we compare one transect with another based on GPS coordinates?
How do we compare transect data to fixed features along the river?
![Page 8: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/8.jpg)
Problem – GPS (XY) Coordinates
![Page 9: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/9.jpg)
![Page 10: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/10.jpg)
![Page 11: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/11.jpg)
USS Enterprise GIS
![Page 12: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/12.jpg)
![Page 13: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/13.jpg)
What do we want?
Ability to easily compare different transects based on location of data points
Ability to compare transects to important features on river, such as discharge pipes
![Page 14: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/14.jpg)
Solution: Simplify the data
![Page 15: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/15.jpg)
Simplify the data
![Page 16: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/16.jpg)
How do we convert XY to dist?
![Page 17: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/17.jpg)
Linear Referencing in ArcGIS
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Route feature class
route = polyline feature class with an embedded measurement system
In ArcGIS, the term route refers to any linear feature, such as a city street, highway, river, or pipe, that has a unique identifier and a common measurement system along each linear feature.
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Create a reference line (route)
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Create a reference line (route)
![Page 21: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/21.jpg)
Linear Referencing - process
X Y EC
Route Feature Class
Point Feature class
Locate features
along routes
tool
Distance EC
Event Table
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![Page 23: Mapping Salinity in the South Old River Aaron Cuthbertson, ES, O&M Barry Montoya, Staff ES, O&M.](https://reader035.fdocuments.in/reader035/viewer/2022062520/5697bff11a28abf838cbafc2/html5/thumbnails/23.jpg)