中文摘要：

本文以水资源系统概化方法为基础，提出构建分层水资源网络的理论和方法。对不同水源运动过程进行划分，分割出包括地表供弃水、河网输水、污水排放、外调水传输和地下水等多层水源网络。通过分层网络系统描述不同物理意义的水力联系和水量平衡关系，量化不同网络水源之间的相互转换和影响，明晰了不同水源运动转化过程，从方法上简化计算过程。最后以海河流域水量平衡模拟为例，检验了其有效性。

英文摘要：

Based on the conceptual water resources system a hierarchical network of water sources is suggested to classify the movement of various water sources. The water sources arc divided into networks for different layers including surface water for supply, river network for water transfer, polluted water to be released, water for transferring to other basins and groundwater. Every network describes the movement of water source at corresponding layer. The hierarchical network can comprehensively describe the hydraulic relationships and water balance based on different physical senses and quantitatively express the interchanges and effects of the water coming from sources at different layers. Through this method the complicated movement and transformation process of different kinds of water can be simplified. The effectiveness of the proposed method is verified by the application to the analysis on water balance in Haihe River basin.