CAJ | 학술논문

　　选取黄河流域中游5条典型支流，基于74个雨量站点1980-2009年的日降雨数据和汛期降雨数据（1~5h精度），利用Mann-Kendall趋势检验与突变检验方法分析研究区域内的汛期降雨特性变化。将次降雨按照场次雨量分级为小雨、中雨、大雨和暴雨，按照场次平均雨强分级为低雨强、中雨强和高雨强降雨，统计各级别的雨量、雨强、频次及历时等，综合探讨不同级别的降雨特性变化。结果表明，区域内汛期降雨总量有略微的增加，而雨强大幅减少；小雨、低雨强降雨的雨型转变明显，暴雨、高雨强降雨受到的影响相对较弱。本文对于理解以超渗产流为主的黄土高原区的产流模式有重要意义。
　　선취황하류역중유5조전형지류，기우74개우량참점1980-2009년적일강우수거화신기강우수거（1~5h정도），이용Mann-Kendall추세검험여돌변검험방법분석연구구역내적신기강우특성변화。장차강우안조장차우량분급위소우、중우、대우화폭우，안조장차평균우강분급위저우강、중우강화고우강강우，통계각급별적우량、우강、빈차급력시등，종합탐토불동급별적강우특성변화。결과표명，구역내신기강우총량유략미적증가，이우강대폭감소；소우、저우강강우적우형전변명현，폭우、고우강강우수도적영향상대교약。본문대우리해이초삼산류위주적황토고원구적산류모식유중요의의。
Five typical loess plateau basins of middle reaches of the Yellow River in China were chosen in this study,characteristics from June to September (JJAS) of the flood season were carefully analyzed by us-ing quality controlled high-precision data (timescale between 1 to 5 hour) from 74 rain gauges over the past 30 years (1980-2009). Mann-Kendall trend method was applied to detect the trend and change point of precipitation time series. Each rainfall event was graded according to some criteria,(1) light rain,mod-erate rain,heavy rain and heavy rain were graded by the amount of each event;(2)low intensity,medium intensity and high intensity rain were graded by the intensity of each event. The amount, intensity, fre-quency and duration of each rainfall level were found by using statistics. Overall, there is a slight increase of the total precipitation in JJAS and a significant reduction of the average rainfall intensity in the study re-gion. Huge shifts are found in the regime of light rain and low intensity rain,while heavy rain and high in-tensity rain show little change. Results of this paper could be important for improving hydrological under-standing in Loess Plateau.