调水调沙以来黄河尾闾河道冲淤演变及其影响因素
刘清兰, 陈俊卿, 陈沈良

Spatiotemporal evolution of Yellow River estuarine channel and its influencing factors since the water-sediment regulation scheme
LIU Qinglan, CHEN Junqing, CHEN Shenliang
图14 利津—清7、清7—汊3河床纵比降变化
Fig. 14 Annual variations of river longitudinal slope