Selected Publications

We produced annual irrigation maps for 1999-2016 in a large agricultural region using all available Landsat satellite imagery. The dramatic improvements in spatiotemporal resolution compared to previous efforts allowed us to quantify trends and variability in irrigated areas, providing critical insights into behavioral responses to irrigation drivers.
In Geophysical Research Letters, 2017.

We discuss the major drivers that have shaped the history, and will direct the future, of water use in modern agriculture. Water management recommendations are made to balance farmer profit and water conservation to ensure future agricultural production.
In Science of the Total Environment, 2016.

Large cities source water from 41% of global land area while occupying only 1%. We analyze the complex interactions that result from this large-scale transport of water in Beijing using the new telecoupling framework.
In Water International, 2016.

Recent Publications

. Quantifying changes in water use and groundwater availability in a megacity using novel integrated systems modeling. In Geophysical Research Letters, 2017.

PDF Dataset Journal Website

. Urban water sustainability: Framework and application. In Ecology and Society, 2016.

PDF Journal Website

. Complex water management in modern agriculture: Trends in the water-energy-food nexus over the High Plains Aquifer. In Science of the Total Environment, 2016.

PDF Project Journal Website

. Changes in forest composition in Ohio between Euro-American Settlement and the Present. In American Midland Naturalist, 2016.

PDF Journal Website

. Tradeoffs among Ecosystem Services Associated with Global Tilapia Introductions. In Reviews in Fisheries Science and Aquaculture, 2016.

PDF Journal Website

. Traits associated with drought survival in three Australian tropical rainforest seedlings. In Australian Journal of Botany, 2011.

Journal Website

. An assessment of invasion risk from assisted migration. In Conservation Biology, 2008.

Journal Website

Recent Posts

I first wrote this cheat sheet for myself in September 2014, but in an effort to collate my scripting references in one place, I’m transferring it to the website here. It therefore comes with a very heavy disclaimer that this is now 3 years old and there are very possibly better ways to do this now (the new feature in R Studio for new project > new package seems an obvious example).


I just posted about making R packages based on 2014 material using roxygen2 directly. As it turns out, the R Studio menus for this are even more convenient. I wanted to leave the previous post for a non-R-Studio reference, but here’s the R Studio workflow: Using R Studio Menus to Create a New Package File -> New Project -> New Directory Choose “R Package” Enter the desired package name and location on your local system Make sure the “Create a git repository” is checked hit the Create Project button Edit the ‘DESCRIPTION’ file as needed.


R Markdown has long been a key component of my research workflow, providing a legible “lab notebook” for my daily analyses. I’ve wanted to transition my Wordpress-based website to GitHub Pages for some time, preferably using R Markdown to better integrate into my workflow. I was pretty thrilled to discover the R blogdown, Hugo, and GitHub pages combination. I was able to set it up in an afternoon, and I have high hopes that it will be a good system to allow me to share my research and analyses with a broader audience.



CLASS Project

Sustainability of irrigated agriculture in the High Plains Aquifer external link.

Remote Sensing of Irrigation

Mapping irrigation dynamics using satellite data


I have been an instructor of the following:

  • Google Earth Engine Tutorial: Geohackweek 2017, University of Washington. Tutorial available here.
  • Using R to Model, Manipulate, and Manage Spatial Data: Student Workshop, International Association of Landscape Ecology World Congress, 2015
  • TA: Ecology, University of Notre Dame
  • TA: General Biology, University of Notre Dame
  • TA: General Biology, Saint Louis University