考虑次网格水文过程的区域气候-水文耦合方法  

Incorporation of sub-grid-scale hydrological processes into regional climate-hydrology coupled models

作　　者：陈星[1] 余钟波[1] 崔广柏[1] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室

出　　处：《河海大学学报（自然科学版）》2008年第3期291-294,共4页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(5023903050679018);教育部长江学者和创新团队发展计划(IRT0717);美国国家自然科学基金(ATM9972956ATM0002637)

摘　　要：针对气候-水文耦合模型采用的计算网格较粗,不能很好地描述小尺度陆面水文过程的不足,以美国萨斯奎那西支子流域为研究区域,构建了考虑水力传导度和降雨次网格空间非均匀性的区域气候-水文耦合模型,从而在较粗的计算网格中描述较细的小尺度次网格水文过程.数值模拟结果表明,考虑次网格水文过程的耦合模型精度更高,模拟径流过程与实测过程拟合更好,并且提高了模型对水文物理过程的代表性.Climate-hydrology coupled models, which are mn at coarse spatial resolutions, cannot typically describe small-scale land surface hydrological processes precisely. However, when they consider the sub-grid spatial variability of hydraulic conductivity and precipitation, new regional climate-hydrology models can describe the sub-grid hydrological processes, even when their grid cell sizes are coarse. Application of a model to the western part of the Susquehanna River Basin in the United States indicates that, compared with the existing models, the new coupled models can simulate the sub-grid hydrological processes with higher precision. Their simulation results are more coincident with the field data and hydrophysical processes can be more accurately reflected.

关 键 词：水文模型 区域气候模型 次网格 空间非均匀性 产流机制 

分 类 号：P339[天文地球—水文科学]