蓄滞洪区洪水资源化的益损定量分析——以大黄堡洼为例

Quantitative benefit /loss analysis of floodwater utilization in a flood detention area: Case study of Dahuangpu Wa

为在蓄滞洪区利用洪水资源,探讨洪水资源化收益和损失的函数关系及其定量分析方法。以大黄堡洼为例,建立收益和损失的准量化函数,基于水文和土地利用信息,采用水力学数学模型,澄清3种特定洪水重现期条件下收益与损失的时空转换关系。研究表明,临界水深是实施洪水资源化规划和管控的关键参数;洪水资源化的入流面积、受益面积、平均水深、最大水深与入流洪量成非线性正比关系,并受到地形地貌和土地利用变化等因素的综合影响。

This paper examines the behavior of floodwater in a flood detention basin and uses quantitative methods to establish the benefits and losses of floodwater utilization. The Dahuangpu Wa flood detention basin was taken to demonstrate semi-quantified functions of benefit and loss. A hydraulic mathematical model was applied to reveal the temporal and spatial conversion during three floods events,with specified return periods,using local hydrological and land-use information. The study indicates that critical water depth is the key parameter for optimum floodwater utilization. The inflow area,benefit area,average water depth and maximum water depth are non-linear and proportional to the flood inflow. Floodwater utilization is strongly linked to topographic features and land-use change.