University of Puerto Rico, Rio Piedras Campus. Environmental Science Department. Coastal Environment Course.

1. Statistical Valuation of the Classification
Water Quality Model in San José Lagoon –
San Juan, Puerto Rico
Marianne Cartagena
Georges Laguerre
David Torres

2. San José Lagoon, San Juan Puerto Rico
http://www.recursosaguapuertorico.com/LagunasSJ-P3.html

3. Background
• San José lagoon has 4.52 km (2.81 miles) of
longitude, 2.2 km of width.
• Born in San Juan Bay and connects with Martin Peña
Chanel, and the Torrecillas Lagoon by the Suárez
Chanel
• The northwest section of the lagoon is referred to as
the Laguna Los Corozos.

4. Background
• The decades of 1950 to 1960,
– Dredged to depths of up to 11 meters,
– Impacting the recirculation of water that means
the SJL began to change its morphology;
– About 90 percent of the watershed area of the
lagoon is urbanized (USGS, 1983).

5. Justification and data description
• According to the SJEB Program the results of
water monitoring shows that its waters has
contaminated
– lack of oxygenation,
– coliforms fecal, fecal enterococcus,
– high turbidity by Secchi Depth
• Degradation of ecosystems
destruction of organisms.
• Water Quality Grade = C.
in
particular
habitat

6. Objectives
• Describe the chemical parameters of quality
water existing data in the SJL.
• Evaluate the relation between the chemical
parameters of water such as Dissolve Oxygen,
Turbidity, and Coliforms Fecal and
qualification index of SJL.

7. Hypothesis
• H0: The Water Index to SJL does not change
respect to the year.
• H0: The Turbidity Variation of SJL is the same
for each year of the study period of time.
• H0: The month proportion of Dissolve Oxygen
in SJL is random.
• H0: The amount of Coliform – Fecal does not
affect the Classification Water Index in SJL.

8. Methodology
• Prior information will be provided by SJEB
Program.
– Standards: The San José Lagoon components of the
estuary are classified as SB waters – coastal and
estuary waters intended for use in primary and
secondary contact recreation, and for propagation
and preservation of desirable species

9. Methodology
• Each one of the hypothesis can be resolve
using a statistical framework and the data
collected by the SJEB Program.
• In accordance with the Water Quality
Classification Model of in the estuary of the
Bay of San Juan to establish inconsistencies in
definitions and descriptions of the
parameters.

10. San Juan Estuary Bay Program Model
• Scope = the numbers of contaminant that
exceeded the PR Water Quality Standard.
• Frequency = the proportion of samples for each
contaminants that exceeded PR Water Quality
Standards.
• Amplitude = the amount by which the samples
exceeded the PR Water Quality Standard.
• Index: 100 – (square root (scope2 + frequency 2 +
amplitude 2)/1.732

11. Thanks!

12. • http://www2.pr.gov/agencias/jca/Documents/
Leyes%20y%20Reglamentos/Reglamentos/Reg
lamentos/Reglamento%20Est%C3%A1dares%
20Calidad%20de%20Agua%202010.pdf