Abstract: The change of wetland landscape is an important indicator of regional ecological environment, and it will have important effects on the regional ecological environment too. In order to accurately evaluate the change law of wetland landscape in the Tarim Populous euphratica Nature Reserve (hereafter referred it to as Reserve) in Xinjiang, the wetland landscape pattern of the Reserve was analyzed by adopting remotely sensed data in the dry and the wet seasons in the same year. It was found that the wetland area in the Reserve was about 130 million ha., and the marsh wetland was the main type of the wetlands in the studied area, accounting for about 74% of the total wetland area, and both the river wetland and the constructed wetland shared 13% each of the total wetland area. Relative to the dry season, the total area of different types of wetlands (except for the constructed wetland) showed an increase trend in the wet season. The river wetland displayed the most significant area variation, of which the permanent river wetland showed the largest change scope, reaching up to 84.37%; while the marsh wetland area gave relatively small change scope, and the constructed wetland area kept stable. The main reasons causing the variation of wetland area during one year were the uneven spatial and temporal distribution of water resources, the disparity between the wet season and the dry season, and the agricultural water usage in the Reserve. From the land type conversion perspective, the areas with land type transformed were added up to 7791.25 ha in the wet season, of which the areas transformed from other land types into the wetland type accounted for 50.55%, and the areas transformed from the herbaceous marsh into other land types accounted for 26.24%. The change of the seasonal or intermittent rivers was the most dramatic, resulting a variation of their 94.2% areas. In summary, the dynamics of wetland landscape in the Reserve in different time and region in one year were obtained in this study, which helped provide some scientific data for the wetland protection policy in the Reserve.

Key words: Populous euphratica Nature Reserve, Wetland Landscape, Seasonal Analysis