基于流域基本单元的分布式流域汇流计算方法

• 作 者: 凌哲 刘宁宁 梁霄 罗静 陈丽霞
• 机 构: 河海大学水文水资源学院,上海市青浦区水务局,浙江省富阳市水利水电局,
• 出 处: 水电能源科学
• 发表日期: 2012年12期
• 关键词: 流域汇流 流域基本单元 单元的 沿渡河 面积—时间曲线 星丰流域 流域水文模型 流域地貌 离散化方法 沿渡河流域

结合现行离散化方法的优缺点,引入流域基本单元的概念,在DEM平台上利用Arcview软件将流域离散化为基本单元,计算流域地貌特征值,构建基本单元—河网型分布式流域水文模型。推导出V形和马蹄形基本单元的面积—时间曲线,用以计算坡面汇流;对于河网汇流则运用Muskingum法计算,其优势在于可充分考虑水流汇集的物理概念和下垫面因子分布不均对流域汇流的影响。以星丰流域和沿渡河流域为对象进行水文模拟应用研究,结果表明,该模型具有良好的适用性。

Combining the advantages and disadvantages of the current discretization method, the concept of basic unit in the basin was introduced. On the DEM platform, Arcview software was used to discretize the basin as the basic unit. The eigenvalue of the basin was calculated and the basic unit - the river network distributed hydrological model was established. The area-time curve of V-shaped and horseshoe-shaped basic units is deduced to calculate the slope confluence. For the confluence of the river networks, the Muskingum method is used. The advantage of this method is that it can fully consider the physical concept of water flow collection and the uneven distribution of the underlying surface factors Impact on catchment convergence. The application of hydrological simulation to the Xingfeng Watershed and Yan Du River Basin shows that the model has good applicability.