【摘要】 根据实测资料,分析位山灌区渠系泥沙淤积问题。结果表明:西输沙渠尾沉沙池口淤高导致水面比降远小于设计比降是西输沙渠泥沙严重淤积的主要原因;西输沙渠的泥沙淤积主要是溯源淤积,由于入池水流不畅、出口处落差较小、日常引沙量较大导致泥沙淤积严重是造成西沉沙池淤沙容积严重不足的主要原因。建议改造输沙渠、优化灌区引水引沙调度方式、实现西沉沙池的动态调控,采用提水或扬水灌溉方式治理位山灌区的泥沙淤积问题。更多还原

【Abstract】 According to the measured data,the sediment deposition in the canal system of Weishan Irrigation District was analyzed.The results show that,the main reason for the severe deposition of the west sediment transport canal is that the surface slope is much smaller than the design slope owing to the sediment deposition in the sedimentation basin at the tail of the west sediment transport canal.The sediment deposition in the canal is mainly headcut deposition.The sluggish incoming flows,the small waterhead at the outlet as well as the large amount of daily transported sediment resulted in the severe sediment deposition,and it further led to the insufficient capacity of the west sedimentation basin.It was suggested that the west canal should be innovated,the dispatch patterns of water diversion and sediment transport in the irrigation district should be optimized,and the dynamic control of the west sedimentation basin should be realized.The sediment deposition in Weishan Irrigation District should be solved by means of pump water irrigation.更多还原