Journal
SUSTAINABILITY
Volume 14, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/su14063677
Keywords
arid and semi-arid regions; flood forecasting; DHF model; impact of small and medium-sized reservoirs; Raoyang River basin in western Liaoning
Funding
- National Key Research and Development Program of China [2019YFC1804304]
- National Natural Science Foundation of China [41771478]
- Fundamental Research Funds for the Central Universities [2019B02514]
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This study examined the efficiency of hydrological models in simulating flood hazards in the Raoyang River Basin, western Liaoning, China. It found that the improved DHF model showed the best performance with high applicability in the study area.
Frequent flood hazards in the Raoyang River Basin in western Liaoning, China, have posed serious threats to people's lives and property. In an effort to study the simulation efficiencies of hydrological models in this arid and semi-arid catchment, this study examined the performance of the Xin'anjiang model, the Liaoning unsaturated model, and the DHF model in the Dongbaichengzi station watershed in the upper reaches of the Raoyang River, China. Additionally, this paper proposed an improved DHF model, which considers the impoundment and regulation of small- and medium-sized reservoirs in the upper reaches of the basin. The flood simulation results demonstrated that the Xin'anjiang model was difficult to apply in this area because the average value of its Nash-Sutcliffe efficiency (NSE) was as low as 0.31. Meanwhile, the simulation efficiencies of the Liaoning unsaturated model and the DHF model were higher than that of the Xin'anjiang model, but the relative error of flood peak discharge and runoff depth for most floods were still high and could not meet the actual forecast requirements by the Reservoir Administration Bureau of Liaoning Province. Overall, the improved DHF model showed the best efficiency, and the mean value of the NSE reached 0.79. Therefore, the improved DHF model has good applicability in the Dongbaichengzi station watershed in the upper reaches of the Raoyang River, China.
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