摘要
为探求从化市水南村部分农田被淹没的原因,分别采用现场调查、水文地形资料分析、数学模型、调洪演算等方法,对本次流溪河洪水和下游牛心岭电站对淹没位置河段水位的影响进行了分析和探讨。结果表明,洪水从大拗坝到达水南村淹没位置河道的时间约为2.6h;从5月7日凌晨4时至12时,流溪河水位明显高于淹没区地形,极容易导致外江洪水从未封堵暗渠进入淹没区;牛心岭电站只用4个闸孔泄洪,在洪峰时刻引起淹没区外侧河道水位抬高约0.05m。
The effect of flood in the Liuxi River and Niuxinling Power Station downstream on water levels of the reach at inundated areas is studied to find flooded reasons by the methods of field exploration,analysis of hydrological and terrain data,mathematical model and flood routing.It shows that there is about 2.6 h necessary for flood to reachthe reach the inundated area from Daao Dam upstream.It＇s very easy for the flood in the Liuxi River to enter inundated areas between 4 AM to 12 AM on 7 May from a culvert unblocked for higher water level in the river.There was about 0.05 m backwater in the river at inundated area when there are only 4 gate holes for flood discharge with one closed at Niuxinling Power Station.
出处
《中国农村水利水电》
北大核心
2012年第2期153-155,共3页
China Rural Water and Hydropower
关键词
二维水流数学模型
混合有限分析法
洪水
农田淹没
two-dimensional mathematical model
hybrid finite analytic method
flood
inundated farmland
