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Water-Quality Loads and Trends at Nontidal Monitoring Stations in the Chesapeake Bay Watershed

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Nontidal Network Station Map

Map showing the location of each of the 117 nontidal network monitoring stations. Currently there are 87 nontidal network stations that have enough monitoring data to support load and/or trend analyses through water-year 2014. The remaining 30 stations have less than five years of monitoring data. A table is provided that defines each of the map numbers.

Short-Term Trends in Loads

Short-term trends in flow-normalized loads represents the total change in loads from 2005 to 2014 (expressed as the total change in pounds per acre). Short-term trends are presented as (1) map showing trends as the change in mass; (2) map showing trends as a percent change; and (3) bar plot showing trends as the change in mass.

Long-Term Trends in Loads

Long-term trends in flow-normalized loads represents the total change in loads from 1985 to 2014 (expressed as the total change in pounds per acre). Long-term trends are presented as (1) map showing trends as the change in mass and (2) map showing trends as a percent change.

Loads

Maps showing the total loads generated at each analyzed nontidal network station during the 2014 water-year. The loads are categorized into three groups based on the equal distribution of the observed range in load.

Per Acre Loads

Maps showing the ten-year average total loads (expressed as per acre loads) generated at each analyzed nontidal network station for the period 2005 to 2014. Additional stations are provided (black outlined boxes) that show five-year average per acre loads (these are stations that only had five-years of monitoring data.

Combined Short-Term Trends in Loads and Per Acre Loads

Maps showing integrated ten-year average per acre loads (some stations are represented as five-year per acre loads) and short-term trends in loads (represented as improving, degrading, or no trend).


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