Research On The Impact Of Climate Change On Hydrological Variation In Zhalong Wetland

Wetland is the unique multi-purpose ecosystem and the ecological landscape with biodiversity, and it is also the most important living conditions for human being. Wetlands function as the downstream receiver of water and waste from both natural and human sources, they stabilize water supplies, thus ameliorating both floods and drought, and they also have high productivity to provide multiform resource for human society, therefor, wetlands play an irreplaceable role in maintaining ecological balance and promoting national economic growth. However, affected by a series of factors, such as the rapid increasement of population in China, continuous shortage of industrial and agricultural water use, global climate change, wetlands in China have faced severe situations, as a result, many wetlands disappear at alarming rates, and considerable parts can never be resumed, whereas, wetlands protection and restoration become the foremost problem to be resolved. Water is the prime factor to shape and maintain the wetland ecosystem, the change of water status is very meaningful for wetland function study and critical stage judgement. So the research on the hydrological cycle is foundation of relative study field. Since the Industrial Revolution, lots of observational facts verify that global climate have been changed significantly. On the part of Zhalong wetland, climate has been changed obviously in the past 40 years. As it is known to all that Zhalong wetland is the representative downstream wetland in the area of Northeast in China. Under the future climate scenario, how do the hydrological cycle and the hydrological variation change in Zhalong wetland? There are the main problems needed to be solved. Around many factors about hydrological cycle in wetland, the runoff about Wuyuer River and evapotranspiration in reed swamp and precipitation in wetland have been choosed to study and research the variation under future climate scenario. The main contents and achievements are as followed:(1) The slop of mean temperature rise is 0.46 ℃/10a in the area of Zhalong wetland and varies from 0.41 to 0.49 ℃/10a at the five weather stations around Zhalong wetland. So it is suggested that the mean temperature have been rised significantly from 1961-2000 in Zhalong wetland.(2) Impact of climate change on the hydrological variation is obviously in Wuyuer River basin. The climate model connective hydrological model and the evaporation ratio function of aridity index to predict natural runoff are choosed to simulate the impact of climate change on...