1. China Institute of Water Resources and Hydropower Research, Beijing 100038; 2. Research Center on Flood and Drought Disaster Reduction of the Ministry of Water Resources, Beijing 100038
Abstract：Drought disaster is one of the natural disasters with high frequency, long duration and wide coverage in China. Timely and accurate assessment of drought can help to prepare for reducing and avoiding the losses caused by drought timely. However, drought as a complex phenomenon, only using drought index cannot fully reflect the severity of drought. Meanwhile, it is difficult to evaluate drought. The SMAPI drought index was calculated based on the distributed hydrological model, and daily sliding statistics method was used to realize the real-time evaluation of drought grade. Combined with land use data, the drought areas of different land uses were counted, and the duration of different drought grades was analyzed by area chart method. A real-time drought evaluation method considering drought index, land use, and drought duration was developed. The results of the drought evaluation in the study area show that the real- time drought evaluation results of this method are basically consistent with the quantitative results of historical drought, and can evaluate feature drought well in the region.
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2022, Vol. 32 
