The Research On The Quaternary Tectonics Evolvement And The Stability Of The Aboveground River In The Lower Reach Of The Yellow River In Henan Province

The Yellow River is the cradle as well as the serious trouble of the Chinese Nation. In the history, the flood toke place frequently with dead body all around and murrain all directions in the lower reach of the Yellow River. With the riverbank of the lower reach of the Yellow River having been added up time after time after the People's Republic of China founded, the chief problem now is not the height of the riverbank but the danger of the riverbank. With the riverbed of the lower reach silting up, the riverbank becomes higher and higher, and the flood becomes more and more serious.It is an import question for study that how to set the emphases riverbank prevent flood project system in reason in the lower reach of the Yellow River. In the history, most levee breaks of the riverbank are burst, the spots of the burst have regular pattern, and ties up the geological structure. The purpose of paper is to try to find the relations about the lower reach of the Yellow River between structure evolvement in the Quaternary Period and the river geologic function, river channel landform, channel change, stability of the riverbank, and evaluates the stability of the aboveground river in the lower reach of the Yellow River in view of structure evolvement in the Quaternary Period to quantitatively forecast the dangerous sector of the aboveground river and offers some basis in building the control flood project.The quantitatively evaluate of the aboveground river should based on the analyses of the effect factor about the stability of the aboveground river in depth. So this study fist use many technologies, such as remote sensing, drilling, geophysical prospecting, measure the Hg in soil, measure earth strain and textual history research to analyses the river channel landform, blind active structure, river geologic function and burst of the riverbank in history, and then construct a ration drop out model about the stability of the aboveground river.The theory of fractals is used, and the concept about "fractals integral" is advanced in the research of the river channel landform first time. A model of riverbed fractals is constructed, and the change about the riverbed fractals number along the riverbed is analyzed quantitatively in this paper.In the research of blind active structure, a blind fault zone named Zhengzhou-Lankao fault is found and approved existed synthetically first time. The character about tilting sink movement of Zhengzhou-Lankao fault is analyzed, and the model--"block tilting lateral erosion pattern" is set up, with which the mechanism of the Yellow River lateral erosion on the south riverside is gave out. A new viewpoint that the tectonics pattern of the Dongpu fault depression is"protruding-falling diagonal" is held up. It is pointed out that Liaocheng-Lankao fault zone isn't the borderline of the Dongpu fault depression first time.In the study on the method of quantitative forecast and evaluate the aboveground river, the concept of "information weight" is injected first time, and the steps of the method is introduced systematically. A quantitative forecast model about the index of instability is set up, with which a exactly result is given that there are 10 sect bally instability and 15 sect rather instability workshop sections in the lower reach of the Yellow River. This method improves the objectivity of the achievement. The achievement offers some importance basis in building the flood-control works of the lower reach of the Yellow River.