水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2014年
6期
164-167,217
,共5页
闽江%闽清河段%河道演变%影响因素%演变趋势
閩江%閩清河段%河道縯變%影響因素%縯變趨勢
민강%민청하단%하도연변%영향인소%연변추세
Minjiang%Minqing channel%channel evolution%influential factors%evolution trend
闽清河段位于闽江下游，受水库建设、河道采砂及航道整治等人类活动影响，水沙条件变化和河床演变较为剧烈，崩岸事故频发，给沿岸人民的生产、生活等带来较大影响。依据河道实测地形资料，从河道平面、深泓线变化及河床断面形态等方面对该河段的演变特征进行了分析。结果表明：受河道两岸山体及河中丁坝群制约，闽清河段平面变化受到限制，历年来的演变以纵向的刷深为主，且刷深幅度明显；其演变受到河道形态与河床边界、水库建设、河道采砂、涉河工程建设、大洪水、支流入汇及潮汐顶托等多个因素的影响；结合演变影响因素的变化趋势，预计今后一段时期内闽清河道仍将以纵向冲刷为主，应加强涉河工程基础的守护。
閩清河段位于閩江下遊，受水庫建設、河道採砂及航道整治等人類活動影響，水沙條件變化和河床縯變較為劇烈，崩岸事故頻髮，給沿岸人民的生產、生活等帶來較大影響。依據河道實測地形資料，從河道平麵、深泓線變化及河床斷麵形態等方麵對該河段的縯變特徵進行瞭分析。結果錶明：受河道兩岸山體及河中丁壩群製約，閩清河段平麵變化受到限製，歷年來的縯變以縱嚮的刷深為主，且刷深幅度明顯；其縯變受到河道形態與河床邊界、水庫建設、河道採砂、涉河工程建設、大洪水、支流入彙及潮汐頂託等多箇因素的影響；結閤縯變影響因素的變化趨勢，預計今後一段時期內閩清河道仍將以縱嚮遲刷為主，應加彊涉河工程基礎的守護。
민청하단위우민강하유，수수고건설、하도채사급항도정치등인류활동영향，수사조건변화화하상연변교위극렬，붕안사고빈발，급연안인민적생산、생활등대래교대영향。의거하도실측지형자료，종하도평면、심홍선변화급하상단면형태등방면대해하단적연변특정진행료분석。결과표명：수하도량안산체급하중정패군제약，민청하단평면변화수도한제，력년래적연변이종향적쇄심위주，차쇄심폭도명현；기연변수도하도형태여하상변계、수고건설、하도채사、섭하공정건설、대홍수、지류입회급조석정탁등다개인소적영향；결합연변영향인소적변화추세，예계금후일단시기내민청하도잉장이종향충쇄위주，응가강섭하공정기출적수호。
Minqing channel is situated at the lower reaches of Minjiang River ,due to the construction of the reservoir , sand excavation in river courses and waterway regulation ,the changes of the flow and sediment conditions and the evolu-tion of the riverbed are relatively strong ,which causes frequent riverbank collapses .These accidents affect the livelihood of people who live along the channel .Based on the measured topographic data of Minqing channel ,the evolution charac-teristics was analysed from aspects of the overall terrain variations ,the changes in thalweg and cross-section morphology , etc .The results showed that the evolution of Minqing channel in late decades were mainly in longitudinal scour with sig-nificant depth ;the influential factors of evolution include the channel morphology and riverbed border ,the construction of the reservoir ,the sand excavation ,the near-shore projects ,the big floods ,the inflow of branches and the tidal jacking . According to the change trend of the influential factors ,it is predicted that the evolution trend of Minqing channel will still mainly be longitudinal scour over a period of time in the future ,and the foundation of the near-shore projects should be protected and reinforced .
