基于数字滤波法和SWAT模型的灞河流域基流时空变化特征研究
发布时间：2019-06-14 21:12
【摘要】：将国内外应用较广的数字滤波法和分布式水文模型SWAT相结合,在进行基流时间特征分析的基础上,通过修正基流退水系数α、模型效率评价、重新运行模型、GIS空间插值和趋势分析等方法,创新性地实现了基流空间特征的可视化表达。研究结果表明:1 2001~2012年灞河流域年均基流指数(BFI)为0.43,总体呈增加的趋势。年降水量与年径流、年基流均呈明显的正相关关系,与年基流指数呈明显的负相关关系;2基流年内变化较为稳定,在时间上存在秋季春季夏季冬季、汛期非汛期的关系。枯水期的基流指数高达0.78,表明基流是枯水期河流的主要补给来源;3灞河流域基流在空间上表现为自东南向西北、自上游向下游逐渐增加的趋势,这种空间分异规律是由流域的地势和河流流向决定的。
[Abstract]:The widely used digital filtering method at home and abroad is combined with the distributed hydrological model SWAT. Based on the analysis of the time characteristics of the base flow, the visual expression of the spatial characteristics of the base flow is innovatively realized by modifying the coefficient 伪 of the base flow, evaluating the efficiency of the model, re-running the model, GIS spatial interpolation and trend analysis. The results show that the average annual base flow index (BFI) of Bahe River Basin from 2001 to 2012 is 0.43, which shows an increasing trend as a whole. The annual precipitation has obvious positive correlation with annual runoff and annual base flow, and has obvious negative correlation with annual base flow index. (2) the variation of base current is stable in the year, and there is a relationship between autumn, spring, summer and winter, flood season and non-flood season. The base flow index in dry season is as high as 0.78, which indicates that the base current is the main recharge source of rivers in dry season. (3) the basic flow in Bahe River Basin increases gradually from southeast to northwest and from upstream to downstream, which is determined by the topography and river flow direction of the basin.
【作者单位】： 西北大学城市与环境学院;西北大学地表系统与灾害研究院;陕西省土地工程建设集团;河北水利电力学院水利工程系;
【基金】：中国科学院国际合作局对外合作重点项目(131551KYSB20160002) 国家自然科学基金项目(41401602) 陕西省自然科学基础研究计划项目(2014JQ2-4021) 陕西省重点科技创新团队计划项目(2014KCT-27) 西北大学研究生自主创新项目(YZZ15011)资助~~
【分类号】：P333
本文编号：2499701
[Abstract]:The widely used digital filtering method at home and abroad is combined with the distributed hydrological model SWAT. Based on the analysis of the time characteristics of the base flow, the visual expression of the spatial characteristics of the base flow is innovatively realized by modifying the coefficient 伪 of the base flow, evaluating the efficiency of the model, re-running the model, GIS spatial interpolation and trend analysis. The results show that the average annual base flow index (BFI) of Bahe River Basin from 2001 to 2012 is 0.43, which shows an increasing trend as a whole. The annual precipitation has obvious positive correlation with annual runoff and annual base flow, and has obvious negative correlation with annual base flow index. (2) the variation of base current is stable in the year, and there is a relationship between autumn, spring, summer and winter, flood season and non-flood season. The base flow index in dry season is as high as 0.78, which indicates that the base current is the main recharge source of rivers in dry season. (3) the basic flow in Bahe River Basin increases gradually from southeast to northwest and from upstream to downstream, which is determined by the topography and river flow direction of the basin.
【作者单位】： 西北大学城市与环境学院;西北大学地表系统与灾害研究院;陕西省土地工程建设集团;河北水利电力学院水利工程系;
【基金】：中国科学院国际合作局对外合作重点项目(131551KYSB20160002) 国家自然科学基金项目(41401602) 陕西省自然科学基础研究计划项目(2014JQ2-4021) 陕西省重点科技创新团队计划项目(2014KCT-27) 西北大学研究生自主创新项目(YZZ15011)资助~~
【分类号】：P333
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