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

• DOI: 10.1016/j.ejrs.2017.04.005
• Publication Date: 2017-04-21T02:16:34Z
• Authors: Vanesa Y. Bohn; Facundo Carmona; Raúl Rivas; Leonardo Lagomarsino; Nadia Diovisalvi; Horacio E. Zagarese
• Keywords: Secchi disk; Turbidity; Salt lake

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