The analysis by using double-mass curve of cumulative runoff and sediment discharge and sediment decoupling indicator shows that,there is a significant relationship between the variation of sediment loads and correlative significant events and policies of Hekouzhen and Longmen region in the Huanghe(Yellow) River Basin.

At present, the most researches of how the policy factor influence stock market fluctuation focus on the continuous policy, the researches for policy event are few, already existed researches mostly are from the angle of single poli.

Although accounting,audit and law have different emphases of the great events of account information false statement,but the basic maintain standards are the standard of″investment decision making″and the standard of″huge effect of stock price″.

The important events in the C.

Scholars and researchers attach great importance to the economic, socio-cultural and evironemtal impacts of mega-events.

Olympic Games and World Exposition will be held in Beijing, 2008 and Shanghai, 2010 respectively, which are two of the most famous mankind mega-events in the next three years, are attracting thousands of millions people from all the world and will greatly promote our economic development.

If these two assumptions are correct,then the general growth pattern will be changed by mega-events,so that change of inlinks can measure the impact of a mega-event on the awareness of tourism attractions in host city.