Session Eight - Data Analysis and Results - Vernier Logger Pro - ArcGIS Explorer Dynamic Model

Water quality collected points in the Río Piedras can be considered generally acceptable in terms of water use, based on national and local standards. Water quality in items collected from the Río Piedras has decreased slightly over the years, given the urban expansion in this area. Activities such as: population growth, industrial and agricultural increased activity, could create a negative impact on the water supply in the near future.  Moreover, according to the data obtained during our field work,  we conclude that the quality of water from this Río Piedras point is good. The levels of pH, conductivity, dissolved oxygen and turbidity are normal and optimal for the survival of aquatic organisms and for domestic use.

This project is still at the stage of research and analysis of results. We will create a dynamic model using ArcGIS technology, will publish a scientific paper to report results and in addition will prepare a "blog" for the publication of results on the Internet.

The temperature of a body of water affects its overall quality. The water temperature out of "normal" range of a stream or river can cause damage to aquatic organisms that live there, such as larvae "stonefly" or mosquitoes. Our results may be compared with the temperatures of the rivers in the U.S. during the summer.

The DO of a body of water is the amount of oxygen in water. The measurements obtained at this point in Rio Piedras have the minimum amount of DO for optimal living conditions for organisms. The DO is 4.7mg / L which is the average in this area.

The pH is a measure of acidity or alkalinity of a solution. The pH indicates the concentration of hydronium ion present in certain substances, in this case, water. According to our research the Río Piedras has an average pH of 7.68. This pH is optimal for the survival of all marine organisms. Water quality at this point in Rio Piedras is generally acceptable for domestic use.

Turbidity is a measure of the lack of water clarity. High turbidity water is cloudy, while water with low turbidity is clear. The cloudiness is caused when light is reflected on the particles in the water. Therefore, the more particles in the water, the greater the turbidity. Our results show that this river has water that is safe to drink. This water is visibly cloudy due to turbidity levels above 5 NTU.

Current flow, or flow, is the volume of water that moves over a designated point for a fixed period of time. It is often expressed in cubic meters per second (cfs). At this point in Río Piedras flow velocity is not of great intensity. At the time of the sample, the river was calm and flow velocity was mild.

The conductivity of a substance is defined as the ability or power to conduct or transmit heat/ electricity. Pure water is a good conductor of electricity. According to the results, the sample has high levels of conductivity. The normal level of conductivity in a river or lake is 5.5 mS / cm.  Our readings were of 381 mS / cm.

Important: See the dynamic model of the Rio Piedras Water Quality Investigation by PR Water Cops CL clicking in this link:

http://www.arcgis.com/home/item.html?id=44e840ff148c4afb9972d26bc4c86b39

NOTE: Download ArcGIS Explorer Free Version to your computer .