INVESTIGADORES
PERILLO Gerardo Miguel E.
congresos y reuniones científicas
Título:
Evaluation of the trophic state and nutrient dynamics of Pampean shallow lakes (Argentina) using a combination of field and satellite data
Autor/es:
BOHN, V.Y.; PRATOLONGO, P.D.; PICCOLO, M.C.; PERILLO, G.M.E.
Lugar:
Torres
Reunión:
Workshop; GLEON 10; 2010
Institución organizadora:
GLEON
Resumen:
A method based on the analysis of satellite image was developed to study the
trophic state of the Pampean shallow lakes (Argentina). The method consists in a
regression model for trophic state estimation between two information sets: field data
(chlorophyll‐a concentration) and satellite spectral reflectance. Field data was obtained
by sampling sites corresponding to Unamuno and Calderón shallow lakes, as
representative cases of the study area. A 0 100 eutrophication scale was developed to
indicate four different trophic levels: oligotrophic, mesotrophic, eutrophic and
hypertrophic. A representation of the spatial distribution of chlorophyll‐a was
developed by means of interpolation. Categorizing interpolated values, an illustration of
the different chlorophyll‐a contents was developed in two thematic maps. The pigment
distribution was analyzed in six selected shallow lakes during two different periods: a
wet and a normal year. The model application showed similar results for the estimation
of the trophic state of the lakes whose mean chlorophyll‐a concentration data was
available. An analysis of frequency was carried out to determine the trophic conditions
of all the water bodies in the study area during both periods.