Temporal and Spatial Signatures of Sediment Transport at the Watershed Scale: An Approach to Understand the Behavior of the Watershed

• D. Lui ; Fuqiang Tian ; H. Li ; H. Lu ; M. Lin ; M. Sivapalan ^[1]
  1. [1] University of Illinois
• Localización: Tecnología y Ciencias del Agua, ISSN-e 2007-2422, Vol. 10, Nº. 4 (julio-agosto de 2019), 2019, págs. 18-45
• Idioma: inglés
• Títulos paralelos:
  • Huellas temporales y espaciales del transporte de sedimentos en la escala de la cuenca hidrográfica: una aproximación para entender el comportamiento de la cuenca hidrográfica
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• Resumen

  • Sediment yield is affected by many factors, such as climate, geology, geomorphology, land use and human activities. Sediment signatures are the statistic indices or curves that are able to effectively describe the temporal and spatial characterist ics of sediment transport and evaluate the ability of the streamflow to deliver the sediment. In this study, the sediment signatures of Upper Sangamon River Basin, which is an intensively managed watershed for agriculture development, are analyzed. Firstly , a semi distributed model of sediment transport is built up based on the Tsinghua Representative Elementary Watershed (THREW) model, and it is applied to the Upper Sangamon River Basin. The result of sediment simulation is analyzed by four sediment signat ures, i.e. specific sediment yield, sediment delivery ratio, cumulative sediment curve and effective discharge. The sediment signatures are consistent with each other and accord with the fact of the agricultural production in Upper Sangamon River Basin.