“…SCI-Expanded, which indexes the world's leading journals of science and technology, is a leading and frequently used metric of scientific accomplishment in most fields of human creativity (Kostoff et al, 2000;Li et al, 2009). Series of search terms, including ''groundwater ⁄ '', ''ground water ⁄ '', ''underground water ⁄ '', ''subsurface water ⁄ '', ''subterranean water ⁄ '', ''unconfined water ⁄ '', ''confined water ⁄ '', ''artesian water ⁄ '', ''phreatic water ⁄ '', ''crack water ⁄ '', ''fracture water ⁄ '', ''fissure water ⁄ '', ''crevice water ⁄ '', ''karst water ⁄ '', ''karstic water ⁄ '', ''well water ⁄ '', and ''spring water ⁄ '' were used to locate publications that contained these words in publications' titles, abstracts, and keyword lists.…”