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Tomales Bay Watershed
This is a collection of hydrographic features related to the Tomales Bay Watershed.
Data set was created by Joseph Kinyon in December 2009.
All data was derived from:
USGS 10 Meter DEM
National Hrydrography Data
California Department of Fish and Game Coastline 1983

Creeks of Tomales Bay Watershed
Creeklines representing water courses that drain to lakes and Tomales Bay.

Features

Feature Labels (name)

Lakes of Tomales Bay Watershed
This layer represents major lakes of the Tomales Bay Watershed

Bon Tempe Lake

Alpine Lake

Kent Lake

Laguna Lake

Nicasio Reservoir
Name = Nicasio Reservoir
Perimeter Miles = 21.4376826197
Area Square Miles = 1.35768187789

Soulajule Reservoir
Name = Soulajule Reservoir
Perimeter Miles = 10.2440763908
Area Square Miles = 0.38495923303

Feature Labels (Name)

Nicasio Reservoir

Soulajule Reservoir

Major sub watersheds of the Tomales Bay Watershed
Exported from TomalesBaySubshed_Merge on 12/14/2009

Arroyo Sausal Subshed

Chileno Creek Subshed

Kent Lake - Lagunitas Creek Subshed

Nicasio Creek Subshed

Olema Creek - Lagunitas Creek Subshed

San Geronimo - Lagunitas Creek Subshed

Tomales Bay - Frontal Pacific Ocean Subshed

Walker Creek Subshed

Information Points

Tomales Bay Watershed Boundary
Derived from 10 meter DEM (Digital Elevation Model) at 1:24,000 scale using ArcHydro tools in ArcGIS 12/14/2009
This represents the Tomales Bay Watershed extent.
Mouth of the bay is derived by drawing a line from the south bank of the mouth of Estero San Antonio at 0 elevation to the northern most point on Tomales Point.

Tomales Bay Watershed Boundary

Tomales Bay Watershed

What kind of run off surfaces are these?

WHAT KIND OF RUNOFF SURFACES?

Tomales Bay Watershed Stormdrains

experiments

Water Quality
By AISBWETWMS
Peter and Ricardo Presentation
Date: Mar 2, 2010
Number of Photos in Album: 13
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This is Rob Carson from the Tomales Bay Watershed Council explaining why water quality is important to know about.
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This is when we were scooping water to test the salinity.
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Here we are testing the water salinity with a refractometer.
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We are testing the salinity, oxygen levels and many more things.

Here we are in class demonstrating the salt water wedge in an estuary.

Here we are in class testing salt water wedges. Salt water is heavier and sinks to the bottom.

This is a picture of the test tube results.

Here we are noticing how water gets to the creeks.

Pollution also comes out of exhaust pipes.

This is an example of pollution.

Because of the pollution we went to look at the storm drains and noticed lots of garbage.

This is how the medalions look when they are in place.

We are putting medalions in front of storm drains to raise awareness in our community.

What is a Watershed
By AISBWETWMS
this is a description of Album, for example: West Marin School students studied watersheds in a BWET elective . This Album is documentation of activities we did to understand " what is a watershed"
Location: Point Reyes Station
Number of Photos in Album: 13
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Joe Kinyon: expert on watersheds and mapping

This is Joe Kinyon teaching us about contour lines.

This is a contour map on which we drew the boundary lines of a watershed.

This is a map showing the contour lines of a watershed

Different surfaces hold different amounts of stormwater runoff, which carries pollution to our creeks.

Different surfaces hold different amounts of stormwater runoff which carries pollution.
Vegetated soil slows runoff.

Different surfaces hold different amounts of stormwater runoff, which carries pollution.

We used this model of a watershed to test the sediment levels in the water from run off.

This is a picture after the rain and lots of pollution.

This is a test of water flow through different surface types and sediments. Sand and soil absorb the most runoff.

This picture of a water pipe shows how water travels through the watershed.

This is a picture of an oil spill in our watershed.
This pollutes the water to a great extent.
(only a model)

stream invertebrates
By AISBWETWMS
Date: Mar 2, 2010
Number of Photos in Album: 11
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We arrived at Tomassini Creek:)

We were getting into the water

We did a lot of tests in the water

We wanted to see what invertebrate creatures were in the water using D-nets.

Observing the water we found many amphipods, and that the fish eat amphipods.

We were trying to catch the invertebrates

Students were having a look at the invertebrates in the water.

An amphipod is a little creature like a shrimp that lives in the bottom of the creek.

This is a better close up of the amphipod from the internet.

Eduardo was looking at the invertebrate through a magnifying glass.

Substrates and Grain Size
Date: Mar 2, 2010

We were in B-WET class learning about the different types of sediments

and describing their textures.

For Example, the sand was rough and there were different types of colors.

First we went to Tomasini Creek and we got inside the creek.

Then we dug up different types of sediments from different parts of the river.

We had to squish the different sediments.

We put the different types of sediments into different measuring containers.

We added water to get a perfect measurment.

We started squishing the sediments with our hands.

The sediments started changing its form and fell through the sieves.

The sediment grains separated into each measuring sieve.
{63 microns}

We collected the the sediment in different sizes

This is the largest mesh.
{4000 microns}

We sorted them out in order of texture.

We put them into a measuring cup to see the volume and mass.

We organized the measuring stuff into an easier step to measure the sediment and it's mass.

We finally measured them and found the results.
We learned that there's different types of sediments in different parts of the creek. Slow moving water deposits fine grains. Fast moving water deposits larger grains.

Stream Flow and Creek Profile
This is presentation is about Jackie's classmates who went on a field trip to Tomasini Creek, where we studied the creeks water flow, how deep it was, and animals living in these waters. Our classmates had a lot of fun and learned a lot.
Location: Point Reyes Station

This is where we began our field trip.(Tomassini Creek)

Madeline explained what we were going to do.

The students began to work and experiment. We measured the depth and shape of the creek bed.

The kids began to work with different tools such as the stadia rod and tape measure.

Ricardo is measuring the water's depth.

Mayra began to record the information.

We had a lemon race to see how fast the water moved and we allowed the students to name their lemons.

The opponents lemon is ready to race.

Daisy and the other girls recorded the lemons times.

Alejandra and Daisy began the race.

READY SET GO!

A very exciting moment for the racers.

Two students get closer to the finish line.

End of races.