|
Yulin City serves as an important coal industrial base in the Yellow River Basin，also a typical ecological fragile area in China, and its eco-environmental quality changes have attracted much attention in recent years. In order to effectively monitor the changes of eco-environmental quality in Yulin City and further assess the effectiveness of ecological restoration in Yulin City, the research integrated multi sensors including Landsat TM, ETM, OLI and MODIS land surface temperature products to construct long time-series Remote Sensing Ecological Index (RSEI) based on Google Earth Engine (GEE) platform. Then, patterns and changes of spatial-temporal distribution from 2000—2020 in Yulin City were revealed and driving force was discussed. Results show that: (1) The eco-environmental quality of Yulin City improved to a large extent from 2000 to 2020, with a significant improvement exceeding 56% of the whole study area which mainly occurred in the southeast of Yulin; Notably, the potential risk of eco-environmental quality degradation exists in the north and southwest; (2) The eco-environmental quality of Yulin City shows obvious geomorphological differences: the eco-environmental quality of Loess Plateau areas in the southeast is much better than that of the Windblown Sand Grassland areas in the north; (3) Transformation of land use types caused by the implementation of policies such as returning farmland to forests and grasslands and mine ecological restoration plays a leading role in the process of restoring the quality of the ecological environment, while extreme meteorological disasters such as droughts can lead to rapid deterioration of the eco-environmental quality.
|
