Spatio-temporal change and response of landscape pattern and land surface characteristic parameters in Guyuan
Based on remote sensing data from 1999,2010,and 2020,the landscape pattern model,vegetation coverage model,land surface temperature model,and soil humidity modeler employed to study the spatio-temporal change characteristics of landscape pattern,vegetation coverage,land surface temperature,and soil humidity in Guyuan City over 21 years,and the response relationship between landscape pattern and land surface parameters was analyzed. The results show that:① The fragmentation degree of all types of landscapes is reduced as a whole over 21 years. Grassland has a large dominance,and the patch shape of grassland and residential land in urban and rural construction tends to be regular gradually. The contagion index and aggregation index show a downtrend,and the extensibility and connectivity of landscape patches decrease. The heterogeneity weakens,and diversity increases. ② The vegetation coverage shows the characteristics of low in the north and high in the south,as well as low in the east and high in the middle,and there are significant changes in the east and west. The vegetation recovers on the whole. The land surface temperature is getting lower generally. The soil humidity increases first and then decreases,with a general downtrend. ③ Landscape type is closely related to land surface parameters,and the vegetation coverage of cultivated land,forest land,and grassland is high. The average temperature of residential land in urban and rural construction is the highest,and the average soil humidity is the lowest.
landscape patternland surface characteristic parametersspatio-temporal changeGuyuan City
万方数据
维普
