Michael N. Fienen Howard W. Reeves Andrew T. Leaf 2021 <div class="abstract-group"><div class="article-section__content en main"><p>Groundwater models have evolved to encompass more aspects of the water cycle, but the incorporation of realistic boundary conditions representing surface water remains time-consuming and error-prone. We present two Python packages that robustly automate this process using readily available hydrography data as the primary input. SFRmaker creates input for the MODFLOW SFR package, while Linesink-maker creates linesink string input for the GFLOW analytic element program. These programs can reduce weeks or even months of manual effort to a few minutes of execution time, and carry the added advantages of reduced potential for error, improved reproducibility and facilitation of step-wise modeling through reduced dependency on a particular conceptual model or discretization. Two real-world examples at the county to multi-state scales are presented.</p></div></div> application/pdf 10.1111/gwat.13095 en The National Groundwater Association SFRmaker and Linesink-Maker: Rapid construction of streamflow routing networks from hydrography data article