This code is associated with the publication: Smith-Tripp, S., A. Griffith, V. Pasquarella, J.H. Matthes. Impacts of a regional multi-year insect defoliation event on growing-season runoff ratios and instantaneous streamflow characteristics. In Review.
This analysis assesses the connection between defoliation in southern New England during a 2015-2017 outbreak of gypsy moth (Lymantria dispar) caterpillars and growing season (June-September) anomalies in watershed runoff ratio, water yield, and instaneous streamflow characterics derived from gage-specific flow duration curves.
The code is organized into R files with analysis pieces:
- 01_loadData.R: Load/download defoliation, stream gage, and precipitaiton data.
- 02_calculateBudgetsFDC.R: Calculate the baseline (1995-2014) and 2015-2017 growing season statistics for yield, precipitation, and runoff ratios, and FDC curves.
- 03_budgetModelsFigures.R: Estimate statistical models and make figures for departures in growing-season runoff ratios/yield/precipitation with defoliation intensity.
- 04_fdcModelsFigures.R: Estimate statistical models and make figures for departures in growing-season FDC statistics with defoliation intensity.
- 05_studyLocationMap.R: Make a map of the study area within the U.S. and with watershed shapfiles showing defoliation intensity in 2015-2017 growing seasons.