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一、前言江西位于长江中下游南岸,介于东经113°35′至118°29′,北纬24°29′至30°05′之间。总面积167176平方公里。江西自然条件优越,气候温和,降水充沛,径流丰富,土地肥沃。但降水和径流的季节分配不均匀,每年的四至六月雨水过剩,容易引起洪涝灾害;七至九月则干热少雨,往往造成旱灾。据1950至1979年的统计,正常年景仅三年,其余年份不是这一部分地区发生干旱则
I. Preface Jiangxi is located on the south bank of the middle and lower reaches of the Yangtze River, between 113 ° 35 ’and 118 ° 29’ longitude and between latitude 24 ° 29 ’and 30 ° 05’ north. The total area of 167176 square kilometers. Natural conditions in Jiangxi Province, mild climate, abundant rainfall, rich runoff, fertile land. However, the seasonal distribution of precipitation and runoff is uneven. There is an excess of rainwater in April-June every year, which can easily lead to floods and floods. Dry weather and dry weather in July and September often result in drought. According to statistics from 1950 to 1979, the normal year is only three years, and the rest of the year is not the one where drought occurs