Physicochemical Properties of River Sediments in an Agriculture Region: A Case Study of Buyeo County, South Korea
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
This study investigated the physicochemical characteristics of river sediments across Buyeo County, Chungnam Province, South Korea. Surface sediments (0-10 cm) were collected from 106 sampling sites and analyzed for pH, electrical conductivity (EC), total nitrogen (T-N), total phosphorus (T-P), exchangeable cations, and soil texture (sand, silt, and clay). Multivariate statistical analyses were employed to examine the distribution characteristics and potential sources of these components. The average pH of the sediments was 6.07 (range 4.54–8.13), and EC averaged 1.11 dS/m (range 0.17–4.86). The mean concentrations of T-P and T-N were 677 mg/kg (range 134–1,760) and 1,155 mg/kg (range 130–6,757), respectively. The coefficients of variation (CV) for T-P (51.6%) and T-N (85.2%) were relatively high, suggesting pronounced spatial heterogeneity and potential anthropogenic influence. Correlation and multivariate analyses further revealed strong associations among T-N, T-P, and EC, indicating that nutrient enrichment in the study area is likely governed by multiple sources, including diffuse agricultural runoff, domestic wastewater, and agricultural drainage. To our knowledge, this work represents the first county-scale sediment assessment of nutrient variability in Buyeo using CV, correlation, PCA, and cluster analysis. The results provide a useful baseline dataset for sediment management and non-point source pollution control in agricultural watersheds.
Abstract
This study investigated the physicochemical characteristics of river sediments across Buyeo County, Chungnam Province, South Korea. Surface sediments (0-10 cm) were collected from 106 sampling sites and analyzed for pH, electrical conductivity (EC), total nitrogen (T-N), total phosphorus (T-P), exchangeable cations, and soil texture (sand, silt, and clay). Multivariate statistical analyses were employed to examine the distribution characteristics and potential sources of these components. The average pH of the sediments was 6.07 (range 4.54–8.13), and EC averaged 1.11 dS/m (range 0.17–4.86). The mean concentrations of T-P and T-N were 677 mg/kg (range 134–1,760) and 1,155 mg/kg (range 130–6,757), respectively. The coefficients of variation (CV) for T-P (51.6%) and T-N (85.2%) were relatively high, suggesting pronounced spatial heterogeneity and potential anthropogenic influence. Correlation and multivariate analyses further revealed strong associations among T-N, T-P, and EC, indicating that nutrient enrichment in the study area is likely governed by multiple sources, including diffuse agricultural runoff, domestic wastewater, and agricultural drainage. To our knowledge, this work represents the first county-scale sediment assessment of nutrient variability in Buyeo using CV, correlation, PCA, and cluster analysis. The results provide a useful baseline dataset for sediment management and non-point source pollution control in agricultural watersheds.