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The 10% rule: (a) In the example discussing the 10% rule, we used two hypothetical waters with pollutant concentration distributions  (indicating that the water is in compliance) and  (indicating that the water is impaired), respectively. Use simulation to evaluate the performance of the 10% rule by estimating the probability of making mistakes when sample size […]

 

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Use the water quality monitoring data from Heidelberg University (Chapter 2, Exercise 4) to • plot TP (total phosphorus) against sampling dates to visualize the changes of TP over time and compare the temporal pattern of SRP to that of river discharge (flow). Describe the seasonal patterns in both. • plot TP against flow, both […]

 

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In addition to NOAA-GLERL, several other institutions also have routine monitoring programs on Lake Erie. Data file LakeErie2.csv contains TP and chla concentration data collected by NOAA-GLERL, Ohio Department of Natural Resources (ODNR), and The University of Toledo (Toledo). (a) Compare the distribution of the TP concentration data from NOAA to the same from ODNR: […]

 

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The Great Lakes Environmental Research Laboratory of the U.S. National Oceanic and Atmospheric Administration (NOAA-GLERL) routinely monitors the western basin of Lake Erie from May to October every year. The data file LakeErie1.csv includes all available data up to the end of 2014. Two variables are of particular interest in studying lake eutrophication. They are […]

 

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