Alyssa Garcia, Lanh Lai, Anna Vasileva
Apparent Concentrations of Chloride, Sulfate and Nitrate in the Edward's Aquifer Recharge Zone
The objective is to monitor the effectiveness of the EAA before and after establishment in 1993. We hope to find noticeable patterns using spatial analysis and identify vulnerable
areas within Uvalde, Medina, Bexar, and Comal counties that may need additional or heightened monitoring. In addition, with the use of GIS and the ArcGIS Buffer tool, we will map areas of high concentrations that may be the result of a spill and attempt to associate these with a source area or point source. We aim to produce results that may highlight
areas of concern and show where stricter regulations are needed in order to improve water quality.
Objective
Methods Used
For our project we used ArcMap version 10.3.1. We utilized the geoprocessing buffer tool and used spatial analyst interpolation (IDW) and the minus tool to highlight areas of high concentrations for our compounds. Furthermore, we conveyed the population of our locations of interest via population dot densities. ArcMap allowed us to better understand the spatial relationships between our areas of interest and possible point sources. The buffer tool made these potential point sources of our compounds more obvious and highlighted areas of concern. The point sources were collected manually, using longitude and latitude, with Google Earth and excel. We extracted by mask our area of interest to better suit our mapping needs, with a 2 mile radius.
