黄河下游宽滩区荒草湿地生境分布与时空变化研究.

In order to analyze the spatial-temporal variation along the wide floodplain of the Lower Yellow River, using Landsat time-series data, the temporal and spatial changes of grass wetland habitats along the wide floodplain of the lower Yellow River of 2000 and 2015 were interpreted by utilizing the modification of normalized difference water index method. The disturbing factors of grass wetland habitats were analyzed in conjunction with the activities of water and sediment along the Yellow River channel. The results show that from 2000 to 2015, the habitat area of grass wetland along the beach area has been decreased and grass wetland habitats tend to migrate downstream. At present, the upstream runoff is concentrated, and the peak value of the corresponding hydro logical pulse is as high as nearly 3 meters, which is not conducive to the stable succession of wetland habitat vegetation along the beach area. In addition, human activities such as agricultural cultivation and sand digging along the beach area also seriously affect the stable development of grass wetland habitats. Based on the analysis of the water and sediment activities along the beach area, the total area of grassland wetland habitats along the Yellow River floodplain area is 247.41 km², accounting for only 9.01% of the total area of the wide beach area. [ABSTRACT FROM AUTHOR]