摘要
本文对三门峡水库建库前潼关高程变化的有关研究成果进行了总结。建库前小北干流是强烈淤积性的河道 ,相应千年以上、百年、几十年的年平均淤积量分别为 0 2 472亿m3、0 3 91 5亿m3和 0 5～ 0 62亿m3,其特点是时间愈接近现在 ,淤积强度愈大。潼关高程在历史时期 ,特别近代处于微淤抬升状态 ,三国至建库前的1 80 5年潼关河床沉积厚约 1 4m ,年均抬升 0 0 0 8m ;关于近代潼关高程变化 ,各家结果相差较大 ,综合分析认为 ,1 92 9～ 1 960年潼关高程年均升高约 0 0 66m。但一段时间内河道的冲淤趋势不能作为长期趋势来对待 ,如何估计三门峡水库建库后 ,潼关高程在自然条件下的可能上升值还有待深入研究。
This paper presents a review of previous research results for the variation in channel bed elevation at Tongguan before the construction of Sanmenxia Reservoir. Prior to the dam construction, the river reach from Longmen to Tongguan experienced heavy aggradations. The yearly mean amount of sediment deposition during the time periods of thousands, hundreds, and decades was about 24.72×10 6 m 3 , 39.15×10 6 m 3 , and 50-62×10 6 m 3 , respectively. This means that the aggradation was becoming more severe as time was progressing from the historical time to recent. The analysis indicated that the channel bed elevation at Tongguan was in a process of slowly aggrading in historical times. During 155-1960, 14 m of bed deposition was found at Tongguan section, giving a yearly rise of 0.008 m in the channel bed elevation. For the recent historical time period of 1929-1960, the yearly averaged amount of channel bed rising at Tongguan was about 0.066 m. However, it may not be appropriate to regard the rate of aggradation in this specific historical time period as a long-term trend.
出处
《泥沙研究》
CSCD
北大核心
2004年第1期70-78,共9页
Journal of Sediment Research
基金
国家自然科学基金创新研究群体科学基金 ( 5 0 2 2 190 3 )
关键词
三门峡水库
潼关高程
黄河
水库泥沙
淤积
Yellow River
Sanmenxia reservoir
reservoir sedimentation
backwater effect
