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干旱是陕西省出现机会多、持续时间长、危害范围广、经济损失最大的农业自然灾害。依据干旱总月数、年均大、中旱出现次数、100天以上干旱出现机率、主要作物生长季节最长无降水日数、当地主栽作物生长期内农田水分盈亏量,季节干旱出现概率等综合指标,揭示了陕西省干旱的地域分异规律,为因地制宜防旱抗旱提供科学依据。
Drought is an agricultural natural disaster with many opportunities, long durations, extensive damage and economic losses in Shaanxi Province. According to the total monthly number of drought, the average number of large and medium drought occurrences, the probability of occurrence of drought more than 100 days, the maximum number of precipitation-free days of main crop growing season, the profit and loss of farmland water during the growth of local main crops and the probability of seasonal drought Indicators, revealing the law of regional variation of drought in Shaanxi Province, to provide a scientific basis for drought prevention and drought control according to local conditions.