Strong winds caused substantial water surface elevation differences in Lake Erie around November 15, 2020.  Here's an animated plot of elevations measured by NOAA.  Plot was developed using R and Windows Live Movie Maker




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Modern unmanned aircraft systems (UAS), better known to the rest of us as drones or quadcopters, can be programmed to collect photos from specific coordinates, altitude, orientation, and gimbal angle, thus allowing photos on different days from the same perspective.

Here's an animated plot of the % of dissolved oxygen saturation in the Delaware Estuary throughout 2022.  All data is from USGS processed to compute the % of saturation and make the animation.

Another seiche occurred on Lake Erie December 23-25, 2022.  Here is an animated plot using the NOAA PORTS data.

Strong winds caused substantial water surface elevation differences in Lake Erie around November 15, 2020.  Here's an animated plot of elevations measured by NOAA.

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Here's a time lapse I made of the Delaware River near Philadelphia.  At this location the Delaware is tidal and the water surface elevation changes throughout the day.  Lots of legacy submerged man-made structure here revealed at low tide.

Animated plot of #Schuylkill River flooding following Tropical Storm #Isaias Data from USGS gages.

Revisiting the river flow profile plot from an earlier post, the video below loops each day's flow profile for the Delaware River in 2019.  Data is from USGS gages processed using R and Windows Live Movie Maker.

Our second fish tank experiment with the Flir One was to insert a foam rubber divider and fill each half of the tank with hot and cold water.

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My son and I played around with an old fish tank, some tap water, and a Flir One thermal imaging attachment for a smart phone.  Here is part one.

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My prior post on animated flow in the Delaware River contained the last work I performed on my previous lap top just before it gave up the ghost.  When a colleague asked me to share it, I was distressed to realize that the script was lost.

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The Delaware River Basin Commission's Delaware Estuary water quality monitoring program, which was initiated in 1967, is one of the longest running monitoring programs in the world.  One advantage of such a long data set is that we can see the changes to water quality over time.

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Back in August 2011, Hurricane Irene struck the mid-Atlantic coast.  This animated graph shows how the storm surge from Irene and the terrestrial flooding from Irene and Tropical Storm Lee (a few days later) impacted water surface elevations in the Delaware Estuary.

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Here's an app that illustrates how fertility and death rates impact the US age structure diagram over time.  The app uses a simple population model to forecast the US age structure in 100 years, starting from 2010 census data and user-selected fertility and death rates.

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Continuing on the theme of updating older visualizations into newer formats, below is a clip of the impact of Superstorm Sandy on Delaware Estuary water surface elevations.  The original MS Excel and screen capture version is posted here.

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Animations of continuous data in GIF format offer some portability advantages over video files.  A few years ago, shortly after Superstorm Sandy, a colleague and I developed a video of animated water surface elevations from USGS gages in Barnegat Bay, NJ as the eye of the storm approached.

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The Delaware River Basin Commission (DRBC) just released a new app for visualizing water quality in the Delaware River Basin.  The DRBC Special Protection Waters Monitoring Program Explorer is a Shiny app that allows users to generate a boxplot and summary table of selected water quality data.

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Imagine you bought solar PVC arrays today, sold the power generated to your local utility, and used the proceeds to add new solar arrays each year.

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WASP and other flow and water quality models ask users to input multiplier and exponent values relating velocity and depth to discharge. These relationships take the form of V=aQ^b and depth=cQ^d, where the values a, b, c, and d describe the curve that approximates paired points from other sources.

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In 2014, EPA documented the relative lack of nutrient data from waste water treatment plant effluents, even though development of surface water quality standards for nitrogen and phosphorus has been a stated priority for more than a decade.

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Monte Carlo analysis is a great way to explore the impact of input variable uncertainty on the results of engineering equations, and with vector variables and distribution and sampling functions at its core, R is a natural platform for this analysis.

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For as long as I have been working with water data, I wanted to construct a line graph superimposed on a box and whisker plot where the boxes show the distribution of values and the line shows some current condition.

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High winds in the Delaware Estuary region caused a "blowout" tide in early April 2016, where observed water surface elevations were much lower than those predicted via harmonic constituents.  Extreme low blowout tides can hamper navigation due insufficient depth.

The Delaware River experienced some high flow in late February 2016, providing an opportunity for an interesting animated graph of river response.

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In this earlier post, I analyzed tidal water surface elevation data from the NOAA PORTS system from both the Delaware Estuary and the Chesapeake Bay, showing how the two systems react very differently to the tidal forcing at their Atlantic Ocean boundaries.

In a previous post I showed an animated age structure diagram depicting output from a simple population model written in Excel.  Here is another version of that model written in R.

After I completed the animated tidal water surface elevation plots for the Delaware Estuary, I looked for other systems with a good set of tidal observation stations.  The Lower Columbia River near Portland, Oregon fit the bill.

In 2013, EPA published final national recommended water quality criteria for the protection of aquatic life from the toxic effects of ammonia in freshwater.

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In the Delaware Estuary, the tidal range at the mouth of the estuary becomes amplified, resulting in a larger range (difference between high and low tide water surface elevation) further up the estuary.  One way to visualize this effect is via violin plots.

Here's an animated choropleth (graph using colored map shapes) of HUC8 watersheds in the Delaware River Basin showing water yield over a span of 20 days.

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I developed an R script to retrieve NOAA PORTS data for the Delaware Estuary overnight and generate an animated water surface elevation plot.  I hope to include this in a larger Delaware River Dashboard web page containing graphs of near real-time data.

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My colleague and I recently published a technical note in the Journal of the American Water Resources Association (JAWRA) on automating a hydrodynamic model of the Delaware Estuary.

I am very excited about R at the moment.  Here is an example of an app I constructed for one of the long term monitoring projects at my full time place of employment.

This video shows the progression of flooding in the non-tidal Delaware River River during Hurricane Irene and Tropical Storm Lee.

Straying outside the Delaware River Basin, this one features the Chesapeake.  And it includes an animated wind rose.

In October 2012 we deployed 2 HOBO U26-001 dissolved oxygen loggers in Frankford Creek, in Philadelphia, PA.

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I am an engineer working in water resources and the environmental field. On the side, I work with small businesses to help automate their data processing functions. I offer reasonable rates and am very efficient. Send me an e-mail at JYagecic@gmail.com
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