Application of physiographic soil erosion–deposition model in estimating sediment flushing efficiency of empty storage

Journal of earth system science

Ching-Nuo Chen^1¹ 

[1] International Master Program in Soil and Water Engineering, National Pingtung University of Science and Technology, Pingtung 912, Taiwan^1

关键词: Shaft spillway pipe;    physiographic soil erosion–deposition model;    runoff;    sediment yield;    efficiency of empty flushing;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

In this study, we developed a physiographic soil erosion–deposition model to simulate sediment yield from a watershed into Agongdian reservoir and sediment flushing to estimate the efficiency of empty flushing. The model was verified using data related to Typhoons Morakot and Fanapi. Thereafter, we calculated the sediment flushing efficiency of empty storage under the conditions of 1- and 2-day storms with seven return periods. The simulated results revealed that the amount of sediment yield from Joushui River watershed was approximately 70% on average, whereas that from Wanglai River watershed was approximately 30%. These results are consistent with those of a government research report, whichsuggested that the sediment yield figures from Joushui and Wanglai River watersheds were 72 and 28%, respectively. Furthermore, the efficiency of empty flushing was more than 55% when using the shaft spillway pipe, suggesting that the model can be applied to estimate sediment yield and flushing efficiency.

【 授权许可】

CC BY