WEBVTT

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The most basic function possible with the USGS
Data Grapher is the one site, one parameter plot.

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Starting with the Time Series, One Site feature,

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you can select any of the sites that have
been loaded into the Data Grapher system.

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For the Oregon Data Grapher, data
from nearly 300 monitoring sites

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from Oregon and southwest
Washington, have been loaded.

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The available water-quality
parameters vary by site,

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with some locations monitoring
only Stage and Discharge,

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while others include water temperature,
dissolved oxygen, pH, turbidity, and others.

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To aid in the site selection process,

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Step 1 allows you to focus your
search to a specific river basin.

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By choosing a specific basin,

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the list of available sites is
narrowed to those within that basin,

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making it easier for you to
locate the site of interest.

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Once you decide on a location, select
it in Step 2, and that site's parameters

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along with the time periods of available data,
will be displayed in the accompanying table.

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Note the link to NWIS-Web for the site
of interest below the parameter table.

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The next step, Step 3, represents the first
style or format choice you must determine.

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Time series is the default, and will
be the graph type we'll cover here.

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However, you also have the option to create
an XY plot with the data from your chosen site.

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Time series plots show one or two parameters,
such as water temperature and pH,

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over a defined time period and
plotted against a date axis.

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Here is where you choose which
water-quality parameter to plot.

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Water Temperature is the default for this site.

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Let's leave it as is.

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Next to the parameter listing is
the type of data you want to plot.

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Do you want all data or are you
only interested in daily statistics?

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We're interested in viewing
all the data available.

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Besides plotting daily statistics, the Data
Grapher can compute running averages.

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So if you are interested in the 7-day running
average, you can implement that here.

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In addition to plotting a single parameter, you
also can choose to incorporate a second variable.

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If you want to plot a second parameter,
either in conjunction with water temperature,

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or as another variable in an XY plot,
you would choose that option here.

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The second to last step
is defining a time period.

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Let's show water temperature
for the month of May, 2011.

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It's worth pointing out that the
"Include all data" option, here,

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will select all data for the chosen
parameters for your site of interest.

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Let's stick to just one month.

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Once your water-quality parameter
and time periods are defined,

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all you need to do is click
the button to make the graph.

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Congratulations!

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You have successfully plotted a
single site, single parameter graph

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for water temperature for the month of May, 2011.