CAJ | 학술논문

枢纽下游的枯水位下降问题是航道出浅的重要原因，也是影响船闸通航、制约航道等级提升的重要因素。在分析澧水艳洲枢纽下游近坝段碍航特性、枯水位变化及原因的基础上，采用二维平面水流数学模型研究了澧水航道升级整治过程艳洲枢纽下游近坝段的浅滩整治问题，包括工程整治方案、整治效果及对枯水位的影响。结果表明：艳洲枢纽下游近坝段河床比降大、枯水位落差集中，具有明显的“陡坎”及“陡比降”现象，若仅以疏浚方式进行航道整治，则将引起艳洲枢纽船闸下游的枯水位明显下降，在艳洲枢纽船闸改扩建中下游设计最低通航水位的确定应充分考虑枢纽下游高等级航道整治工程的影响。
추뉴하유적고수위하강문제시항도출천적중요원인，야시영향선갑통항、제약항도등급제승적중요인소。재분석례수염주추뉴하유근패단애항특성、고수위변화급원인적기출상，채용이유평면수류수학모형연구료례수항도승급정치과정염주추뉴하유근패단적천탄정치문제，포괄공정정치방안、정치효과급대고수위적영향。결과표명：염주추뉴하유근패단하상비강대、고수위락차집중，구유명현적“두감”급“두비강”현상，약부이소준방식진행항도정치，칙장인기염주추뉴선갑하유적고수위명현하강，재염주추뉴선갑개확건중하유설계최저통항수위적학정응충분고필추뉴하유고등급항도정치공정적영향。
The descent of low water level downstream hydro?junction is an important cause for shallow chan?nel, also an important unfavorable factor for ship lock safe navigation and waterway grade improvement. In this pa?per, the navigation?obstructing characteristics and the causes of low water level change in near?dam reach down?stream Yanzhou hydro?junction in Lishui River were analyzed, then the 2?D flow mathematical model was employed to study the shoal regulation problem in waterway grade improvement, including regulation scheme, effect and influ?ence on low water level. The results indicate that:the river bed gradient in near?dam downstream the Yanzhou hydro?junction is high, and the height of low water is concentrate, with obvious“scarp”and“steep gradient”phenome?non, and thus the dredging method is an appropriate way to achieve the design depth;when the channel regulation plan in Lishui River is implemented, the lowest navigation water level downstream the Yanzhou existing ship lock may largely descend, and need reduce its lowest navigation water level.