Impacts of urbanization on stormflow magnitudes in small catchments in the Sandhills of South Carolina, USA
學年 107
學期 1
出版（發表）日期 2018-09-01
作品名稱 Impacts of urbanization on stormflow magnitudes in small catchments in the Sandhills of South Carolina, USA
作品名稱（其他語言）
著者 Chen-Ling J. Hung; L. Allan James; Gregory J. Carbone
單位
出版者
著錄名稱、卷期、頁數 Anthropocene,23,p.17-28
摘要 Research on urban flood hydrology—especially in small watersheds—is urgently needed in response to a dearth of small catchment studies, rapid urban growth, increased flash flooding, and precipitation variability. This study compares stormflow between three small catchments in the South Carolina Sandhills of the USA: two heavily urbanized, and one forested catchment that serves as a proxy for pre-urban conditions. Comparisons of runoff volume, runoff coefficient, peak discharge, and shape of dimensionless unit hydrographs (DUH) show significantly larger stormflow volume and peak instantaneous discharge in the urban catchments that exceed those in the forested catchment by more than an order of magnitude. Changes in hydrograph shapes are visualized by DUHs and measured by skewness and kurtosis. Urban kurtosis values of DUHs are significantly higher than forested kurtosis values (p-values < 0.01) implying a difference in timing of stormflow volumes. In addition to changes in hydrograph shapes, urban runoff coefficients are significantly higher (p < 0.0001) than forested values. Urban times-to-peak were correlated with rainfall duration. Urbanization of hilly, forested areas with sandy soils, such as the Sandhills environment investigated in this study, can cause pronounced increases in runoff and peak discharge that result in substantial non-stationarity and increased flood risks. These hydrologic changes reveal a substantial shift in stormwater responses to anthropogenic alterations that represent a pervasive and on-going aspect of the “Anthropocene”.
關鍵字 Urban flood hydrology;Stormwater runoff generation;Anthropocene land-use change;HydrographRainfall-runoff process
語言 en_US
ISSN 2213-3054
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Chen‐Ling J. Hung
審稿制度 是
國別 USA
公開徵稿
出版型式 ,電子版,紙本
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/121018 )

SDGS 潔淨水與衛生,產業創新與基礎設施,永續城市與社區,夥伴關係