Yan Yixun is a Ph.D. candidate in Environmental Planning and Design at the China University of Geosciences (Wuhan). Her research interests include historical water environment evolution, human-water interactions, and GIS-based spatial analysis. Her doctoral dissertation focuses on the middle reaches of the Minjiang River Basin during 1644–1949, integrating historical documents, old maps, remote sensing imagery, and field data to examine river channel changes and their driving mechanisms, as well as the relationships among drought-flood variations, the spatiotemporal distribution of water culture sites, and water environment changes.