What is a Eulerian-Lagrangian-Agent Method (ELAM)? A Eulerian-Lagrangian-Agent Method (ELAM) formally called a CEL Agent IBM Eulerian-Lagrangian-Agent Method (ELAM) is a mechanistic mathematical approach for decoding and forecasting the multi-dimensional movement behavior patterns of individual animals responding to patterns in abiotic and biotic stimuli available to engineering (e.g., hydrodynamic, water quality, eutrophication, GIS, etc.) models or a priori field data.  The ELAM approach allows biologists, engineers, scientists, and modelers to describe observed movement patterns in a way that provides: a mechanistic biological explanation (hypothesis) of observed movement patterns that can be further studied (e.g., validated) with experimental means, and a systematic, tractable means for forecasting the movement behavior response of a population, composed of individuals, to alternative water and land resource management strategies.