漳河平原河段河道渗漏研究  

Study of Channel Leakage in the Plain Reach of Zhang River

作　　者：李婷婷[1] 黄津辉[1] 

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《南水北调与水利科技》2014年第1期12-15,31,共5页South-to-North Water Transfers and Water Science & Technology

基　　金：教育部新世纪优秀人才支持计划基金项目(NCET-09-0586);海河流域典型河流生态水文效应研究(201101018);水利部公益性项目(201201114);国家国际科技合作专项(S2013BGR0244)

摘　　要：漳河平原河段属宽浅型沙质河道,由于长期断流,地下水补给逐年减少,地下水位持续降低,极大地影响了岳城水库对下游城市的输水效率。在实地考察的基础上,根据实测数据,建立了漳河平原河道渗漏模型,采用流量控制、水位验证的方法确定漳河平原河道在水库不同下泄流量时的渗漏量。研究发现,漳河平原河段单位河长的渗漏面积沿程变化大,反映了其游荡性河道的特点;河道总渗漏量随水库下泄流量的增大而增大,但所占比重逐渐减小,并在流量增大到一定值时趋于稳定。本文构建的渗漏模型中,引入了一个综合因子作为模型参数,来反映实际情况对渗漏系数的影响,将未知因素的确定参数化,具有实用意义。The plain reach of Zhang River is a wide and shallow sandy channel. Due to being cut-off for a long time, the recharge to groundwater decreased yearly, resulting in a gradual reduction of groundwater level and therefore affecting the water trans mission efficiency of Yuecheng Reservoir to downstream cities. Based on the field survey and measured data, a channel leakage model for the plain reach of Zhang River was developed, and the leakage rates under different flow rates of reservoir were deter- mined by a two-step method, including calibration step using the observed flow data and validation step using the water level da ta. The results showed that the leakage area per unit reach length varies significantly, indicating the wandering characteristics of the Zhang River. Moreover, it was suggested that the total leakage increases with the increasing of flow rate of reservoir;howev er,the proportion of total leakage to total flow decreases and tends to be stable. A comprehensive factor was introduced in the leakage model to reflect the effects of actual conditions on leakage coefficient, and the parameterization of the unknown factors is practical.

关 键 词：漳河 河道渗漏 渗透系数 渗漏面积 参数率定 

分 类 号：TV11[水利工程—水文学及水资源]