CAJ | 학술논문

根据雷州半岛13个雨量站1970—2013年的月降水量资料，利用定义的长短周期降雨旱涝急转指数分析雷州半岛长周期和短周期汛期降雨旱涝急转现象的时间演变趋势，结果表明：①高LDFAI和高SDFAI反映降雨的旱转涝趋势，低LDFAI和低SDFAI则对应降雨的涝转旱， SDFAI在显示旱涝急转时优于LDFAI。②雷州半岛长周期降雨旱涝急转主要是以全旱为主，其次是全涝，旱转涝与涝转旱相当。③5个短周期时段的降雨旱涝急转发生频率最高的均是全旱，其次是涝转旱和旱转涝；4月15日～6月15日的全旱发生频率高于其他短周期。
근거뇌주반도13개우량참1970—2013년적월강수량자료，이용정의적장단주기강우한로급전지수분석뇌주반도장주기화단주기신기강우한로급전현상적시간연변추세，결과표명：①고LDFAI화고SDFAI반영강우적한전로추세，저LDFAI화저SDFAI칙대응강우적로전한， SDFAI재현시한로급전시우우LDFAI。②뇌주반도장주기강우한로급전주요시이전한위주，기차시전로，한전로여로전한상당。③5개단주기시단적강우한로급전발생빈솔최고적균시전한，기차시로전한화한전로；4월15일～6월15일적전한발생빈솔고우기타단주기。
Based on monthly precipitation data from 13 rainfall gauging stations covering 1970-2013 in the Leizhou Peninsula , the immediate flood-drought shift , e.g.shift from drought to flood and vice versa , was analyzed for flooding season with long-cycle drought-flood abrupt alternation index ( LDFAI in short ) and short-cycle drought-flood abrupt alternation index ( SDFAI in short ) . The major results are: ① the high LDFAI and SDFAI can well describe the drought-to-flood shifts, while the low LDFAI and SDFAI can well describe the flood-to-drought shifts .SDFAI has better performance when compared to LDFAI with respect to description of drought-flood abrupt alternation .②LDFAI shows the highest probability of drought , followed by the flood , flood-to-drought shifts and drought-to-flood shifts .③The highest probability of floods can be detected in five short-cycle times of flooding season, followed by the flood-to-drought shifts and drought-to-flood shifts.The droughts are subject to higher frequency during periods of April 15 to June 15 when compared to other short-cycle times.