Rationale:  While the importance of legacy effect
characterization to interpreting long-term records of ecological
conditions has continued to emerge (Bain et al. in review Legacies in Material Flux: Structural Catchment Changes Pre-date Long-term Studies” BioScience)
some early structural legacies (e.g. substantial soil losses to
erosion) are challenging to characterize with controlled experiments. 
However, the extended observations of hydrologic conditions at long-term
ecological research sites allow for the calibration and validation of
hydrologic models (Sivandran et al. 2008 ,Eos Trans. AGU, 89(53),
Fall Meet. Suppl., Abstract H21F-0888).  Reconstructions of pre-legacy
landscapes can be explored with such models.  Further, the replication
across long-term research sites can provide additional insight by
examining ecosystem response across relevant contrasts.  We propose to
convene a synthesis working group to: (1) Develop tRIBS+VEGGIE models
for several long-term sites (BES, HBR, KNZ) using contemporary long-term
data, (2) Develop scenarios of conditions during pre-European
settlement periods and model these conditions to examine potential
legacy changes in hydrology imparted to the landscape and current
eco-hydrological systems.