人民黄河
人民黃河
인민황하
Yellow River
2015年
8期
13-16
,共4页
水沙变化%冲淤特性%小北干流%黄河
水沙變化%遲淤特性%小北榦流%黃河
수사변화%충어특성%소북간류%황하
change of water and sediment%scouring and silting characteristics%Xiaobeiganliu%Yellow River
依据实测水沙及淤积断面资料，对黄河小北干流河段水沙变化及冲淤特性等进行了分析。结果表明：①多年平均进入黄河小北干流的水、沙量分别为295．3亿m3、8．07亿t，汛期水、沙量分别占全年水、沙量的54．5％、87．7％，多年平均含沙量为27．3 kg／m3；②用实测淤积测验资料计算的1960—2012年黄河小北干流累计淤积量为23．26亿m3，“汛期淤积，非汛期冲刷”是该河段的冲淤特性；③床沙粒径小于0．025 mm和小于0．050 mm沙重百分数沿程分布的特点是自上游向下游沿程逐渐增大，即床沙逐渐变细。
依據實測水沙及淤積斷麵資料，對黃河小北榦流河段水沙變化及遲淤特性等進行瞭分析。結果錶明：①多年平均進入黃河小北榦流的水、沙量分彆為295．3億m3、8．07億t，汛期水、沙量分彆佔全年水、沙量的54．5％、87．7％，多年平均含沙量為27．3 kg／m3；②用實測淤積測驗資料計算的1960—2012年黃河小北榦流纍計淤積量為23．26億m3，“汛期淤積，非汛期遲刷”是該河段的遲淤特性；③床沙粒徑小于0．025 mm和小于0．050 mm沙重百分數沿程分佈的特點是自上遊嚮下遊沿程逐漸增大，即床沙逐漸變細。
의거실측수사급어적단면자료，대황하소북간류하단수사변화급충어특성등진행료분석。결과표명：①다년평균진입황하소북간류적수、사량분별위295．3억m3、8．07억t，신기수、사량분별점전년수、사량적54．5％、87．7％，다년평균함사량위27．3 kg／m3；②용실측어적측험자료계산적1960—2012년황하소북간류루계어적량위23．26억m3，“신기어적，비신기충쇄”시해하단적충어특성；③상사립경소우0．025 mm화소우0．050 mm사중백분수연정분포적특점시자상유향하유연정축점증대，즉상사축점변세。
Based on the hydrometrical data of flow,sediment concentration and siltation,water&sediment volume change and scouring and silting characteristics of Xiaobeiganliu segment were analyzed. The results show that a)the average annual volume of water and sediment quantity that flow into the segment is 295. 3 × 108 m3 and 8. 07 × 108 t respectively,among which 54. 5% and 87. 7% are in flood period. The average annual sediment concentration is 27. 3 kg/m3 . b)The siltation volume during 1960—2012 of the segment is 23. 26 × 108 m3 , which reflects the scouring and silting characteristics in the segment-deposition in flood season and erosion in non-flood season. c)The per-centage of sediment smaller than 0. 025 mm and 0. 050 mm on the river bed is gradually increasing from upstream to downstream,which means the particle size gets smaller along the river.
