4、。关键词:设计洪水过程;径流趋势变异分析;线性矩;MannKendallFlood hydrograph designing and Runoff trend analysis in North River BasinKONGDongdong,YANGYe,ZHENGYitao,LIANGHongwei,ZHOUMin,ZHUODeAbstract:AccordingtothedataofHengshiStantionfrom1956to1998(excludingthedataof1987duet