Evolution of the Eco-geological Environment and Influence Factors in the Yellow River Delta

The Yellow River delta is the newest land in China. The great change of eco-geological environments has occurred in this area under the condition of large decrease of the water and sediment flux from Yellow River. Based on the integrated study of muti-temporal remote sensing monitoring, the soil visual resistance rate detection in different periods and chemical analysis of water and soil, the evolution laws and influence factors and mechanism of eco-geological environments have been studied in the delta. The results suggest that the pollution conditions of surface water and soil have been mitigated, the degree of groundwater mineralization increases, the soil salinization aggravates, the coastal belt is in retrogradation. and the total area of wet land increases. But the natural wet land area decreases, the biology exhibits the characteristic of pollution community and biological species decrease in intertidal zone.