黄河宁蒙河段凌汛灾害预警指标体系研究.

At present, the ice flood disaster in Ningxia-Inner Mongolia reach of the Yellow River is relatively serious, so it is urgent to make a systematic and comprehensive analysis of the impact factors of the ice flood disaster and compact the ice flood disaster early warning index. This paper adopted data analysis and induction method to analyze the four factors affecting the flood season disaster, the data of four typical hydrological stations in Ningxia-Inner Mongolia reach of the Yellow River from 1957 to 2020 were selected, the characteristics of air temperature, water level, ice density and ice thickness were analyzed and determined the temperature, the density of water, ice, ice thickness as early warning indexes. According to the results of data analysis, quantitative warning indicators were used to determine the corresponding warning threshold, dividing into four warning levels of blue, yellow, orange and red, which could provide basis for making a scientific and effective emergency plan and reducing economic loss. [ABSTRACT FROM AUTHOR]