期刊
SUSTAINABILITY
卷 12, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/su12124928
关键词
soil erosion; sediment delivery ratio; SEDD; RSEDD
资金
- National Taipei University of Technology-King Mongkut's Institute of Technology Ladkrabang Joint Research Program [NTUT-KMITL-108-01]
- Ministry of Science and Technology (Taiwan) Research Project [MOST 108-2621-M-027-001]
Sediment transport to river channels in a basin is of great significance for a variety of reasons ranging from soil preservation to siltation prevention of reservoirs. Among the commonly used models of sediment transport, the SEdiment Delivery Distributed model (SEDD) uses an exponential function to model the likelihood of eroded soils reaching the rivers and denotes the probability as the Sediment Delivery Ratio of morphological uniti(SDRi). The use of probability to modelSDR(i)in SEDD led us to examine the model and check for its statistical validity. As a result, we found that the SEDD model had several false assertions and needs to be revised to correct for the discrepancies with the statistical properties of the exponential distributions. The results of our study are presented here. We propose an alternative model, the Revised SEDD (RSEDD) model, to better estimateSDR(i). We also show how to calibrate the model parameters and examine an example watershed to see if the travel time of sediments follows an exponential distribution. Finally, we reviewed studies citing the SEDD model to explore if they would be impacted by switching to the proposed RSEDD model.
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