This engineering journal includes a variety of article types (i.e., research articles, research briefs, review articles, frontier articles, and perspective articles) on the topics of hydrological, evapotranspiration, soil erosion, water quality, and biogeochemical processes; drainage, irrigation, conveyance, and reservoir infrastructures; agricultural, forest, peri-urban, stream, wetland, and coastal systems; microbial, organism, plot, field, farm, watershed, ecosystem, continental, and global scales and interactions; sustainability, resiliency, circularity, management, mitigation, recovery, and restoration approaches; and disciplinary, interdisciplinary, and transdisciplinary perspectives, which integrate engineering and physical sciences related to natural and environmental systems. The journal encourages articles that consider systems thinking using a variety of multidisciplinary approaches including field and laboratory experimentation, measurement techniques, modeling, data analysis, decision support, and case studies. The journal invites articles from an international audience.