摘要
汛初 ,三门峡库区堆积了大量的淤积物 ,各级运用水位的回水范围小。经泄洪排沙运用 ,淤积物基本得到清理 ,30 5m水位回水延伸到北村附近 ,调沙库容增至 0 .5亿m3 左右。此时 ,壅水淤积物分布在北村以下 ,上段河道不受壅水影响 ,河床冲刷继续发展。进入非汛期运用后 ,潼关—段淤积量主要来源于运用水位大于 32 2m ,尤其是32 4m水位期间的部分入库沙量。潼关高程年内升降变化与潼关—段冲淤量密切相关 ;年际间 ,潼关高程与潼关—段河槽淤积量之间呈线性变化 ,即潼关—段河槽淤积量增减 0 .0 2 3亿m3 ,潼关高程随之升降 0 .10m左右。
In the early flood period, there is a large amount of deposits in the Sanmenxia Reservoir, and the backwater zones responding to different water stage are very short. After floods flushes, the deposits are mainly cleared out, and so the backwater end responding to water stage of 305 m extend to about Beicun with capacity for sediment regulation increased to 0.5×10 8 m 3. During the period, the deposits due to backwater effect are mainly below Beicun. The upstream reach is not up to backwater with river bed being eroded continuously. In the non flood period, the main deposits from Tongguan to Guduo are caused by fed sediment when corresponding operational stage is above 322 m, especially 324 m. Variation in elevation at Tongguan in a year is closely correlated with the deposits from Tongguan to Guduo. The annual elevation at Tongguan is linearly related to the deposits with 0.10m rising/falling in the elevation being caused by 0.023 ×10 8 m 3 deposits increased/decreased, respectively.
出处
《人民黄河》
CAS
北大核心
2001年第11期15-17,共3页
Yellow River
基金
"九五"国家重点科技攻关项目 ( 98-92 8-0 2 -0 1-0 5 )
关键词
水库运用
冲淤分布
潼关高程
三门峡水库
黄河
reservoir operation
sedimentation distribution
elevation at Tongguan
Sanmenxia Reservoir
