To follow up on may 20th, a teleconference on drought prevention and preparedness in the county, to raise the awareness of the public at large about water problems, to raise the level of emergency response, to ensure a steady and effective level of security in my county this year, a compilation of common sense of prevention is being prepared, with the hope that the authorities will organize their studies. I. Basic common sense (i) rainscale classification: rainfall of less than 10 mm per day. Rain: daily rainfall 10-25 mm. Heavy rain: daily rainfall 25 ~ 50 mm. Heavy rain: days of rainfall 50-100 mm. Heavy rain: daily rainfall 100 ~ 250 mm. Extraordinary storm: days of rainfall 250 mm or more. (note: daily rainfall refers to the current day from 8 p. M. To 8 p. M. The following day) (ii) drought is a climatic phenomenon of dry air and water scarcity in soil due to chronic rainfall. Small drought: no consecutive rainfall, 16-30 days in spring, 16-25 days in summer, 31-50 days in autumn winter. Drought in china: no consecutive rainfall, 31-45 days in spring, 26-35 days in summer, 51-70 days in autumn winter. Great drought: no consecutive rainfall, 46-60 days in spring, 36-45 days in summer, 71-90 days in autumn winter. Extreme drought: no consecutive rainfall, over 61 days in spring, 46 days in summer and 91 days in autumn winter. (iii) floods. Floods are defined as particularly large run-off. Such run-off tends to be widespread because of the unaffordability of rivers. Depending on the water source formed by the flood and the time of its occurrence, it is generally possible
