Advances in assessment research of nature wetland

Wetland science research has been paid great attention to and the nature wetland assessment was one of the key researches all over the world in recent years. The paper reviewed briefly the advances in the assessment index,the assessment technology of ecological environment quality and its fragility,benefit and health,and ecological system function,benefit and value in the estuarine,river,reservoir and lake wetland,as well as the application of the new technology in the above-mentioned aspects. These researches aimed mostly at the little scale,the single type of wetland ecological system or it acted on by the single force at the conventional environment conditions. Based on it,considering the mutual action between wetland ecological system and its ambient ecological system and the response mechanism of the wetland ecological at the extreme environment conditions,the paper puts forward several aspects of perfecting the nature wetland ecological system assessment technology including river-wetland system assessment,the impact assessment of nature wetland on the sustainable development of the vicinage and its subsystem,nature wetland feedback as-sessment and nature wetland assessment technology under the extreme conditions.