摘要
近50年来城陵矶站年最高洪水位累计抬高了约1 5m,通过一维非恒定流数学模型研究说明,城陵矶至汉口河段淤积只抬高了洪水位约0 2～0 3m,不是城陵矶洪水位抬高的主要因素。通过理论探讨和实测资料分析说明,由于洞庭湖容积减小等因素影响,近50年来螺山水文站年最大日平均流量累计增大了约7000m3 s,抬高洪水位约1 2m,是洞庭湖区洪水频率增加和城陵矶洪水位抬高的主要因素,在制定长江中游和洞庭湖区防洪规划时应加以考虑。
The Chenglingji Hydrological Station located at the outlet of the Dongting Lake. The water level at this station rises about 1.7m in the recent 50 years. The causes of this rising are analyzed by using a 1-D mathematical model for unsteady flow. It is found that the major factor affecting the water level rising is the reduction of the water volume stored in the Lake. Due to the volume reduction the annual average daily discharge at the Luoshan Station increases by 7000m^3/s resulting in the rising of the water level about 1.2m. The water level rising resulted from deposition taken place in the river section from Chenglingji to Wuhan is in the range from 0.2m to 0.3m only.
出处
《水利学报》
EI
CSCD
北大核心
2004年第8期33-37,45,共6页
Journal of Hydraulic Engineering
关键词
城陵矶
洪水位升高
洞庭湖
长江
湖水容积减小
Chenglingji Hydrological Station
water level rising
Dongting Lake
Changjiang River
water volume reduction
