人民黄河
人民黃河
인민황하
Yellow River
2014年
1期
39-41,64
,共4页
水沙变化%断面形态变化%冲淤特性%沁河下游
水沙變化%斷麵形態變化%遲淤特性%沁河下遊
수사변화%단면형태변화%충어특성%심하하유
water and sediment variation%sectional form variation%characteristics of scouring and deposition%Lower Qinhe River
依据实测水沙资料研究了沁河下游水沙变化及对主槽断面形态的影响，分析了主槽下切对两岸引水及靠河险工的影响，并采用断面法和沙量平衡法对河道冲淤量进行了计算。结果表明：①进入沁河下游的多年平均水、沙量分别为11．2亿m3、504万t，汛期水、沙量分别占全年水、沙量的61．6％、94．4％，多年平均含沙量为4．5 kg/m3，近期来水来沙量呈递减趋势；②断面法计算的沁河下游多年平均淤积量为100万t，其中主槽淤积量占全断面淤积量的43％，伏背-丹河口、丹河口-武陟、武陟-沁河口河段的多年平均淤积量分别为3万、32万、65万t；③主槽深泓下切使得两岸引水困难、靠河工程根石外露，建议开展相关治理研究。
依據實測水沙資料研究瞭沁河下遊水沙變化及對主槽斷麵形態的影響，分析瞭主槽下切對兩岸引水及靠河險工的影響，併採用斷麵法和沙量平衡法對河道遲淤量進行瞭計算。結果錶明：①進入沁河下遊的多年平均水、沙量分彆為11．2億m3、504萬t，汛期水、沙量分彆佔全年水、沙量的61．6％、94．4％，多年平均含沙量為4．5 kg/m3，近期來水來沙量呈遞減趨勢；②斷麵法計算的沁河下遊多年平均淤積量為100萬t，其中主槽淤積量佔全斷麵淤積量的43％，伏揹-丹河口、丹河口-武陟、武陟-沁河口河段的多年平均淤積量分彆為3萬、32萬、65萬t；③主槽深泓下切使得兩岸引水睏難、靠河工程根石外露，建議開展相關治理研究。
의거실측수사자료연구료심하하유수사변화급대주조단면형태적영향，분석료주조하절대량안인수급고하험공적영향，병채용단면법화사량평형법대하도충어량진행료계산。결과표명：①진입심하하유적다년평균수、사량분별위11．2억m3、504만t，신기수、사량분별점전년수、사량적61．6％、94．4％，다년평균함사량위4．5 kg/m3，근기래수래사량정체감추세；②단면법계산적심하하유다년평균어적량위100만t，기중주조어적량점전단면어적량적43％，복배-단하구、단하구-무척、무척-심하구하단적다년평균어적량분별위3만、32만、65만t；③주조심홍하절사득량안인수곤난、고하공정근석외로，건의개전상관치리연구。
Based on the observed data of water and sediment,this paper studied the water and sediment variation in the downstream channel of the Qinhe River and the effect of that on sectional form of main channel. The effects of riverbed entrenchment of main channel on water diversion by both sides and that on dangerous anti-flood projects were analyzed. Scouring and deposition amount was calculated by section method. The results show:a)Annual average water and sediment amount entering into the lower Qinhe River is 1. 12 billion m3 and 5. 04 million tons respectively,and that of flood season account for 61. 6% and 94. 4% respectively. Annual average sediment concentration is 4. 5 kg/m3 and the water and sediment amount had a descending trend in recent years. b)Annual average deposition amount in downstream channel of the Qinhe River is a million tons of which the deposition amount of main channel account for 43% of the full section’s deposition amount. Annual average deposition amount of the reach from Fubei to Danhe River estuary,and that of the reach from Danhe River estuary to Wuzhi,and that of the reach from Wuzhi to Qinhe River estuary is 30 thousand tons,320 thousand tons and 650 thousand tons respectively. c)Water diversion by both sides becomes difficult and founda-tion stone is exposed because of riverbed entrenchment of main channel. Research on correlation treatment is suggested to be carried out.
