oesf logging road sedimentation gis

OESF GIS

ONRC GISTZA, Keven BennettAugust 7, 2007

OESF GIS

GIS builds ONRC’s partnership with DNR

Jeff Comnick’s 2006 Report “Watershed Analysis on the Olympic Experimental State Forest, a Methodology Integrating GIS and Forest Inventory”

Jason Cross’ Owl Studies, SMORPH and Riparian Buffer Widths projects

Other ONRC generated or funded work

Road Sedimentation Model

Developing and integrating automated GIS processes

& Jeff Comnick’s script into a user-friendly model

Road Stream Crossings AnalysisType 3 Watersheds Editing and Issues RevealedBackground Sediments Analysis

Jeff Comnick’s 2006 Report “Watershed Analysis on the Olympic Experimental State Forest, a Methodology Integrating GIS and Forest Inventory”

Jason Cross’ Owl Studies, SMORPH and Riparian Buffer Widths projects

Other ONRC generated or funded work

OESF GIS

Road Sedimentation ModelGIS builds partnerships for ONRC

Developing and integrating automated GIS processes & Jeff’s script into a user-friendly modelRoad Stream Crossings Analysis

Type 3 Watersheds Editingand Issues Revealed

Background SedimentsAnalysis

OESF GIS

Road Sedimentation Model – the model

GIS builds partnerships for ONRC

This model calculates and summarizes sedimentation by traffic level on road segments within Type 3 watersheds and within Watershed Administrative Units (WAUs) in the OESF.

First, we had to get to know the type of data we were dealing with. DNR maintains some of the State’s most comprehensive GIS data, especially their roads and streams data needed for this model.We documented every stepnecessary first, then implemented them as model steps. We also integrated and edited Jeff’s scriptfor looping through T3s and WAUs.

DNR had Jeff’s road sedimentation script, but had noautomated series of steps that preprocesses the input GIS data.

OESF GIS


TheAutomated

GISSteps


OESF GIS


TheInterface


OESF GIS


Developing and integrating automated GIS processes & Jeff’s script into a user-friendly modelRoad Stream CrossingsAnalysis



OESF GIS


Road Sedimentation Model – Road – Stream Crossings (RSX) Analysis

Road-Stream crossings are a core dataset required by the Road Sedimentation model.

DNR did not have data that was logically consistent with their trans and hydro layers.

Using a number of techniques, including the use of 2006 aerial photography provided by the USDA, we identified 8,700 crossings within the OESF.

OESF GIS





OESF GIS


Jeff asked us to take a look at his old T3s and “clean them up.” We resolved the data, and with DNR’s use of the model, new issues bring to light some very important questions about the modeling scale chosen, in general.

Extensive edits were made to the original T3 layer so it could be usedin the RoadSeds model.As DNR uses the model, they see that the results of summarized sedimentation by T3 is not as desired.

There are MANY VERY SMALL Type 3 watersheds less than 100 acresin the OESF. What size is too small to delineate?

There are several VERY LARGE areas (7 greater than 10,000 acres).These are the big fish-bearing channels (Hoh, Queets, Sol duc, etc.).How should those be dealt with?

Road Sedimentation Model – T3s

OESF GIS





OESF GIS


HCP specifies that sedimentation contribution by roads in excess of 100% of background sediment value in any given watershed is considered negative impact on environment

Background sediment valuesfor each T3 were determinedand compared to modeloutput

Analysis was based on Jeff’sprevious study in 2006.DNR requested a newanalysis be done basedon the newly cleaned T3s

Road Sedimentation Model – ‘BackSeds’ Analysis

OESF GIS


Developing and integrating automated GIS processes & Jeff’s script into a user-friendly model

Road Stream Crossings AnalysisType 3 Watersheds Editingand Issues Revealed

Background Sediments Analysis

We originally had one month to develop the model itself.‘RSX’, T3s, and ‘BackSeds’ were added. DNR was convinced that we had the skills necessary to do more.

ONRC GIS

ONRC GIS builds partnerships for ONRCIn the past, ONRC GIS has focused on Clearinghouse, professional workshops, a variety of projects for the ONRC Marine Program.

This year, we were able to support ONRC’s Forest Program as well.GIS is a tool. It shows the relationships between geographically distributed resources and the associated data to manage them.

We have garnered excellent relations with our partners in the region, and we’re known for producing innovative, results-oriented work and professional products.

We routinely successfully fulfill our original program goals:

•GIS Analysis and Technical Support•Regional Information Coordination

(Clearinghouse, Marine Data Access Initiative)•Education

(Professional workshops, ForksGIS, and local high school Interns)•GIS Lab Maintenance

We help our clients use our GIS tools with extensive documentationand technical support.

ONRC GIS learns the scientific and technical context that each of ourclients work in, then we design our GIS tools to match.

OESF GIS


Thank you

Weikko Jaross at DNR Olympia

Craig Magnusen, Scott Horton, and David Christiansen at DNR Forks

Starla Delorey, DNR Consultant

Jeff Comnick and Jason Cross at ONRC

oesf logging road sedimentation gis

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