CAJ | 학술논문

基于海河平原28个四级子区1956年-2011年逐月平均降水量数据，运用线性倾向估计、Mann-Kendall 趋势检验、Morlet 小波分析等方法，对海河平原年降水量变化特征进行研究。结果表明：海河平原北部和南部降水最丰，中部滨海地区次之，而中部山前地带最寡；降水主要集中在夏季，约占全年降水量的68.7%，冬季降水量最少，约占全年降水量的2.5%。研究还发现，近56年来海河平原年降水量呈现不明显的下降趋势，这主要是由夏季降水量明显减少造成的。28个四级子区中，年降水量下降趋势较为显著的子区有12个，主要分布在黑龙港运东平原及西北部山前平原，而个别子区降水量变化呈现不明显的上升趋势。近56年，海河平原年降水量整体上的周期性变化不明显，但在1956年-1990年、1956年-1980年、1993年-2008年期间分别存在4 a、11 a 和7 a 尺度的周期变化。
기우해하평원28개사급자구1956년-2011년축월평균강수량수거，운용선성경향고계、Mann-Kendall 추세검험、Morlet 소파분석등방법，대해하평원년강수량변화특정진행연구。결과표명：해하평원북부화남부강수최봉，중부빈해지구차지，이중부산전지대최과；강수주요집중재하계，약점전년강수량적68.7%，동계강수량최소，약점전년강수량적2.5%。연구환발현，근56년래해하평원년강수량정현불명현적하강추세，저주요시유하계강수량명현감소조성적。28개사급자구중，년강수량하강추세교위현저적자구유12개，주요분포재흑룡항운동평원급서북부산전평원，이개별자구강수량변화정현불명현적상승추세。근56년，해하평원년강수량정체상적주기성변화불명현，단재1956년-1990년、1956년-1980년、1993년-2008년기간분별존재4 a、11 a 화7 a 척도적주기변화。
Based on the average mont hly precipit ation data collected at 28 Level-4 sub-segments in the H aihe River Plain from 1956 to 2011, the variation characteristics of precipit ation in the Haihe River Plain w ere analyzed using the methods of linear re-gression, Mann-Kendal trend test, and Morlet wavelets analysis method. T he results show ed that ( 1) t he average precipitation in the H aihe River Plain varies spat ial y. The north and south have the most abundant rainfall, fol ow ed by the cent ral coastal area, and the central piedmont has the least amount of rainfall; and ( 2) the average precipitat ion also varies temporally. Over 68. 7% of t he rainfall occurs in summer, w hile only about 2. 5% occurs in w inter. In addit ion, annual precipitation in the Haihe Riv-er Plain had an insignificant decreasing trend in the recent 56 years, which w as caused by the obvious decreasing trend of precip-itation in summer. Among the 28 Level-4 sub-segments, 12 of them showed a significant decreasing trend of precipitation, and they are mainly locat ed in the Heilonggangyundong Plain and the piedmont plain in the northwest. Moreover, a few Level-4 sub-segments had an insignificant increasing trend of precipitation. In the recent 56 years, there w as no significantly periodic change on the annual precipitation; how ever, there were a 4-year interval, a 7-year interval, and an 11-year interval occurring during the periods of 1956 to 1990, 1993 to 2011, and 1956 t o 1980, respectively.