黄土高原河流演化研究中的几个地学问题——与朱照宇、丁仲礼先生商榷

以河流阶地与堆积黄土、河流起源与冰期、河流演化与新构造运动等3个问题与《专著》商榷.其中风成黄土不应属河流冲积阶地组分，黄土层厚度尺寸不应计入河流阶地面高度中；河流起源应考虑冰期要素，离石黄土中第二砂质黄土层应属鄱阳冰期层位.冰期前为河流起源Ⅰ期，冰期后为河流起源Ⅱ期；河流演化是在新构造运动支配下发生，黄河、洛河、汾河等演化均属各自流域内多个盆地间贯通的首次演化；河流尚有跨两大已成河流域间的二次演化；给出了洛河演化模式阶地位相图.

Several Geological Problems of River Evolution in Loess Plateau

Discusses with the author in the treatise in this works on the relationships between river terrace and accumulative loess,river origin and glacial stage,river evolution and tectonic movement In fact,the aeolian loess is not component of river alluvial terrace and loess thickness is not computed in elevation of river terrace table Glacial stage plays an important role in river origin The second sandy loess layer in Li Shi is part of Poyang glacial stage The first river evolution (I stage)occurs before Poyang glacial stage while the second river evolution (II stage)takes place after Poyang glactial stage It proves that river evolution shows a close relation to neotectonism In addition,the authers put forward two river evolution models:the one is the evolution which all the river basins are linked up to become the current river, such as the Yellow River,the Luohe River and the Fenhe River etc;and the other is the secondary evolution in which a river is captured by another river,such as the Yangtze River The evoultion model of the Luohe River is evaluated in detail.