Document Type
Article
Abstract
Floodplain riparian ecological zones (FREZs) are transitional environments that facilitate interactions among hydrological, geomorphological, and environmental processes within aquatic and terrestrial systems. In the context of climate change, urban growth, and increased hydrologic modifications, these systems are experiencing accelerated degradation. This study employed a multi-criteria Riparian Condition Assessment (RCA) framework that combined the Riparian Condition Assessment Tool (RCAT) and a fuzzy inference system (FIS) to evaluate riparian corridor health in the Congaree River watershed, South Carolina, USA. Using 30 m LANDFIRE land-cover data, hydrologic segmentation (at 500 m reach scale), and transport infrastructure overlays, we quantified riparian vegetation deviation, land-use intensity, and floodplain accessibility across 20 HUC-12 sub-watersheds. Comparison of historic and current vegetation types revealed six dominant pre-settlement ecotypes versus five existing types, indicating significant conversion to agriculture and urban development. The RCA results classified 3% of reaches as confined/impacted, 11% as poor, 38% as moderate, 25% as good, and 23% as intact, with an overall accuracy of 82% and Cohen's κ of 0.81. Findings reveal that multiple stressors together impair riparian function, especially in the Columbia metropolitan corridor. The integrated RCA–FIS framework offers a transferable method for diagnosing FREZ impairment and guiding restoration efforts.
Digital Object Identifier (DOI)
Publication Info
Published in Discover Geoscience, Volume 4, 2026.
Rights
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
APA Citation
Adetoro, O.-I. O., Wang, C. S., Salami, A. T., & Awotoye, O. O. (2026). Riparian ecosystem condition and impaired floodplain assessment in the Congaree river watershed, South Carolina. Discover Geoscience, 4.https://doi.org/10.1007/s44288-026-00486-6