人民长江
人民長江
인민장강
YANGTZE RIVER
2015年
7期
7-11
,共5页
一维非恒定流%库尾挖沙减淤%水沙模型%三峡水库
一維非恆定流%庫尾挖沙減淤%水沙模型%三峽水庫
일유비항정류%고미알사감어%수사모형%삼협수고
one-dimensional unsteady flow%sediment dredging in reservoir tail%flow-sediment model%Three Gorges Reser-
三峡水库运行后，上游来沙中大部分粗沙淤积于库尾，不仅减少了水库的有效库容，对库尾回水段的通航也将产生影响。为减少三峡库尾泥沙淤积，提出了一种新的水库减淤方式，即固定河段挖粗沙方案。该方案通过持续疏浚将入库粗沙大部分截留挖除，控制粗沙向上游延伸，可有效实现水库减淤。根据三峡库尾河道地形和淤积特点，提出了7种挖沙减淤方案，并采用一维非恒定流水沙数学模型，计算分析了不同挖沙方案的减淤效果，并对比提出推荐挖沙方案。
三峽水庫運行後，上遊來沙中大部分粗沙淤積于庫尾，不僅減少瞭水庫的有效庫容，對庫尾迴水段的通航也將產生影響。為減少三峽庫尾泥沙淤積，提齣瞭一種新的水庫減淤方式，即固定河段挖粗沙方案。該方案通過持續疏浚將入庫粗沙大部分截留挖除，控製粗沙嚮上遊延伸，可有效實現水庫減淤。根據三峽庫尾河道地形和淤積特點，提齣瞭7種挖沙減淤方案，併採用一維非恆定流水沙數學模型，計算分析瞭不同挖沙方案的減淤效果，併對比提齣推薦挖沙方案。
삼협수고운행후，상유래사중대부분조사어적우고미，불부감소료수고적유효고용，대고미회수단적통항야장산생영향。위감소삼협고미니사어적，제출료일충신적수고감어방식，즉고정하단알조사방안。해방안통과지속소준장입고조사대부분절류알제，공제조사향상유연신，가유효실현수고감어。근거삼협고미하도지형화어적특점，제출료7충알사감어방안，병채용일유비항정류수사수학모형，계산분석료불동알사방안적감어효과，병대비제출추천알사방안。
After the operation of Three Gorges Reservoir, most of the coarse sediment from upstream deposits in the tail area of the reservoir, reducing effective reservoir capacity and influencing the navigation. In order to reduce the deposition in the tail area of the reservoir, a new reservoir deposition reducing scheme is put forward, that is to dredge out the coarse sediment at fixed river reaches. By the continuously dredging, most of the in-coming coarse sediment can be trapped and excavated out, so as to con-trol the siltation stretching to the upstream and effectively reduce the reservoir siltation. We propose seven schemes according to topographic characteristics at different sedimentation locations. By one-dimensional unsteady flow-sediment mathematical mod-el, the sediment reducing effect of each scheme is analyzed and the optimal scheme is recommended.
