Figure 1. Pie Charts Showing Boron HI by Pathway at Riddle Run Stations. (click image to enlarge)
RIVRISK is linked with a Geographical Information System (GIS) for graphical
representation of risk values at specific locations of interest with the Riddle
Run watershed in western Pennsylvania. Risk values are predicted by
RIVRISK and then exported to EMAGIS, a MapInfo based GIS.
Figure 1 shows a pie chart of boron hazard index (HI) for three pathways, ingestion of drinking water, ingestion of root vegetables, and ingestion of leafy vegetables. The proportion of risk from each pathway is constant at all locations in the small stream network, but the magnitude of total risk from these three pathways decreases from upstream to downstream locations. The total HI is approximately 3.4 at the furthest upstream location, RRD (PRE), and decreases to 1.2 at the furthest downstream location, RRNS.
Figure 1. Pie Charts Showing Boron HI by Pathway at Riddle Run
Stations. (click image to enlarge)
Figure 2 shows a bar chart of boron drinking water HI and the level of concern, an HI value of 1. The bar chart shows that the drinking water HI falls below the level of concern between the stations RRD (POST) and RRD-HALF.
Figure 2. Bar Charts of Boron Drinking Water HI and Level of
Concern (=1) at Riddle Run Stations. (click image to enlarge)
Boron drinking water risk was predicted by RIVRISK
in the Allegheny River downstream of the discharge point of the Riddle Run
watershed. Figure 3 shows the contoured risk values displayed on a map of
the Allegheny River. Note from the legend that the HI values are far below
the level of concern. The far shore sees little if any effect from the
discharge of the Riddle Run small stream network into the river.
Figure 3. Boron Drinking Water HI in the Allegheny River Downstream of
Riddle Run. (click image to enlarge)