ENVIRONMENTAL VARIATION IN THE ESTUARY OF YELLOW RIVER

摘要

With the development of the economy, the human activities have more and more effects on natural environment. The large Water Conservancy and Hydropower Projects, such as the big-dam-building on the river, the water-transferring project, the water resources-exploiting project, and the sewage-discharge project, etc., have caused great multi-aspect influences on the environmental changes. The unreasonable activities of mankind in water resources exploitation have deteriorated the natural environment, intensifying the conflicts between the human beings and the nature. Environment and natural disasters have brought forward rigorous challenge on the survival and development of the mankind. Some abnormal environmental changes (Environment Variation) can be observed in rivers, influencing our life greatly. The concept of environmental variation has been proposed in analyzing the processes of environmental change, and the reparation methods for the river environment variation have been stated as well. Styles of river environmental variation can be classified according to characteristics of the river and of human activities. The characteristics and the consequences of the environmental variation in the estuary of Yellow River have been analyzed, so have the reparation methods. With a practical water-sand adjusting project in the lower Yellow River, the rationality and practicability of such measures have been validated.