Articles | Volume 29, issue 15
https://doi.org/10.5194/hess-29-3745-2025
https://doi.org/10.5194/hess-29-3745-2025
Research article
 | 
14 Aug 2025
Research article |  | 14 Aug 2025

Two-dimensional differential form of distributed Xinanjiang model

Jianfei Zhao, Zhongmin Liang, Vijay P. Singh, Taiyi Wen, Yiming Hu, Binquan Li, and Jun Wang

Data sets

Data for TDD-XAJ J. Zhao https://doi.org/10.5281/zenodo.14226969

Daily surface climatological data for China (V3.0) National Meteorological Information Centre (NMIC) http://data.cma.cn/data/cdcdetail/dataCode/SURF_CLI_CHN_MUL_DAY_V3.0.html

Anhui Water Information Anhui Provincial Department of Water Resources (APDWR) http://yc.wswj.net/ahsxx/LOL/

SRTMDEMUTM 90 m resolution digital elevation product Computer Network Information Center of the Chinese Academy of Sciences (CNIC-CAS) https://www.gscloud.cn/sources/details/306?pid=302

GlobeLand30–30 m resolution global land cover dataset National Geomatics Center of China (NGCC) https://www.webmap.cn/commres.do?method=globeIndex

Model code and software

Code for TDD-XAJ J. Zhao https://doi.org/10.5281/zenodo.14227068

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Short summary
This paper reformulates the model equations of the distributed Xinanjiang hydrological model in fully differential form and incorporates two-dimensional slope runoff routing methods, which are solved using appropriate numerical techniques. The main contribution is to provide an approach for distributed hydrological models that have evolved from lumped counterparts to reduce inherited numerical errors and to improve terrain representation, thereby enhancing their physical realism and simulation accuracy.
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