A Unified Runoff Generation Scheme for Applicability Across Different Hydrometeorological Zones

61 Pages Posted: 7 Feb 2024

See all articles by Qinuo Zhang

Qinuo Zhang

affiliation not provided to SSRN

Ke Zhang

Hohai University

Lijun Chao

Hohai University

Xinyu Chen

affiliation not provided to SSRN

Nan Wu

Hohai University

Abstract

Runoff generation in humid and arid regions are usually saturation-excess-driven and infiltration-excess-driven respectively, whereas semi-humid regions is confronted with complex nonlinear rainfall-runoff process influenced by both of them. In this study, we proposed a unified runoff generation scheme to delineate the mixed runoff generation processes by integrating a modified Horton infiltration module with the saturation excess runoff generation module of the Xin'anjiang model at the grid scale, and a new distributed hydrological model, grid-Xin'anjiang-infiltration-excess (GXAJ-IE) model was developed. The model was tested in four watersheds and two models with single runoff generation mode were set as benchmarks for comparison. The results indicate that GXAJ-IE model has higher flexibility and robustness in reproducing flood hydrographs, especially flood peaks in semi-humid watersheds. It achieves comparable performances with the benchmark models in humid, arid and semi-arid regions. Overall, GXAJ-IE model shows potential for universal application in flood simulation in different hydrometeorological regions.

Keywords: semi-humid regions, saturation excess and infiltration excess mechanisms, unified runoff generation scheme, grid-Xin'anjiang-infiltration-excess (GXAJ-IE) model, universal application, flood forecasting

Suggested Citation

Zhang, Qinuo and Zhang, Ke and Chao, Lijun and Chen, Xinyu and Wu, Nan, A Unified Runoff Generation Scheme for Applicability Across Different Hydrometeorological Zones. Available at SSRN: https://ssrn.com/abstract=4719400 or http://dx.doi.org/10.2139/ssrn.4719400

Qinuo Zhang

affiliation not provided to SSRN ( email )

No Address Available

Ke Zhang (Contact Author)

Hohai University ( email )

8 Focheng West Road
Jiangning District
Nanjing, 211100
China

Lijun Chao

Hohai University ( email )

8 Focheng West Road
Jiangning District
Nanjing, 211100
China

Xinyu Chen

affiliation not provided to SSRN ( email )

No Address Available

Nan Wu

Hohai University ( email )

8 Focheng West Road
Jiangning District
Nanjing, 211100
China

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