Development of an empirical model for chlorophyll- a and Secchi Disk Depth estimation for a Pampean shallow lake (Argentina)

BOHN, VANESA Y.; CARMONA, FACUNDO; RIVAS, RAÚL; LAGOMARSINO, LEONARDO; DIOVISALVI, NADIA; ZAGARESE, HORACIO E.

The Egyptian Journal of Remote Sensing and Space Science

Elsevier

Lugar: Amsterdam; Año: 2017

1110-9823

Shallow Pampean lakes are located in the most productive plain of Argentina. They are highly variable in salinity, turbidity and surface area. Laguna Chascomús has been monitored as a representative example of them. We developed a linear model based on satellite images validated against field measurements (2001?2011 period). A vegetation index and Landsat Surface Reflectance (Band 4) produced the best cor- relations with chlorophyll-a (Chl-a) and Secchi Disk Depth (SDD), respectively. In a second instance, a ret- rospective analysis (1986?2013) was performed. As a result, significant positive trends were observed for SDD and Chl-a. In addition, both variables displayed trends related to rainfall and site depth.