基于蓄满超渗时空动态组合的网格新安江模型
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1.河海大学水文水资源学院;2.河海大学

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国家自然科学基金项目(51979070, 52079035);国家重点研发计划项目(2018YFC1508103)


Grid-Xin
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国家自然科学基金项目(51979070),姚成;国家自然科学基金项目( 52079035),李致家;国家重点研发计划项目(2018YFC1508103),姚成

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    摘要:

    半干旱半湿润地区下垫面条件复杂、降雨时空差异大,产流模式混合多变,导致网格新安江模型(Grid-XAJ)表现不佳。为使Grid-XAJ更好地适应半干旱半湿润地区洪水模拟及预报,在其基础之上,通过降雨和土壤含水量动态产流因子之间的判定关系,动态识别产流过程中网格的主导产流模式,构建基于蓄满超渗时空动态组合的网格新安江模型(Grid-XAJ-SIDE),以半干旱的绥德流域为研究流域,对Grid-XAJ-SIDE与Grid-XAJ模型和网格格林-安普特模型(Grid-GA)进行对比验证。研究结果表明:3个模型在绥德流域的模拟径流合格率均在80.0%以上;洪峰合格率方面,Grid-XAJ-SIDE模型(66.7%)相较于Grid-XAJ模型(53.0%)和Grid-GA模型(40.0%)有明显提升。Grid-XAJ-SIDE模型更好地考虑了降雨、土壤含水量对产流时空分布的影响,实现了对产流过程的精细描述。

    Abstract:

    In semi-arid and semi-humid regions, due to the spatial topography and rainfall heterogeneity, the runoff generation mechanisms are mixed and variable. As a result, the simulation accuracy of Grid-Xin"anjiang model (Grid-XAJ) is low. In order to improve the forecasting accuracy of Grid-XAJ in semi-arid and semi-humid areas, based on Grid-XAJ, the spatio-temporal dynamic combination of the saturation-excess and infiltration-excess runoff was considered to further research in this paper. The dominant runoff generation mechanism of the basin grid in the process of runoff generation was dynamically identified by determining the relationship between rainfall and soil moisture. Constructing the Grid-Xin’anjiang and saturation-infiltration double excess distributed model(Grid-XAJ-SIDE). The semi-arid Suide watershed was selected for comparing the simulation results of the Grid-XAJ-SIDE, the Grid-XAJ and the Grid-GA models. The results show that the qualified rate of runoff simulation of the three models in the Suide watershed are all above 80.0%. Compared with the Grid-XAJ (53.0%) and Grid-GA (40.0%) models, the Grid-XAJ-SIDE (66.7%) model has a higher flood peak simulation qualified rate. The Grid-XAJ-SIDE model can capture the control effects of rainfall and soil water content on runoff generation process, and achieve a clear description of runoff generation processes in the basin.

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杜若愚,姚成,刘玉环,等.基于蓄满超渗时空动态组合的网格新安江模型[J].河海大学学报(自然科学版),,():25-32

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  • 收稿日期:2021-11-08
  • 最后修改日期:2022-11-13
  • 录用日期:2022-04-18
  • 在线发布日期: 2022-04-19
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