标准差椭圆模型在干旱半干旱过渡带城市湿地景观时空分布特征分析中的应用OACHSSCD

To quantitatively reveal the evolution patterns of wetlands in industrial cities in arid and semi-arid regions,this study constructed a Standard Deviational Ellipse(SDE)model using ArcGIS 10.8 to analyze the structural composition,spatiotemporal distribution characteristics,dynamic change rules,and driving forces of wetland landscapes in the study area from 2000 to 2020.The results show that the wetland type structure is relatively simple,dominated by floodplains and marshes,supplemented by rivers and canals,lakes,and reservoirs and ponds.The total wetland area increased steadily,while the interannual changes in the area of different wetland types varied.The areas of rivers and canals,reservoirs and ponds,and marshes first increased and then decreased,whereas the opposite trend was observed for lakes and floodplains.The former group(rivers and canals,reservoirs and ponds,marshes)was more significantly affected by human activities,while the latter group(lakes,floodplains)was more strongly influenced by climate factors.Wetlands exhibited a scattered distribution at the patch scale and a distinct north-south linear extension pattern in terms of spatial distribution,with little interannual variation in this spatial pattern.The wetland centroid showed an obvious southward aggregation trend.Significant differences existed in the distribution direction,centroid position,distribution scope,and extension direction among different wetland types,presenting distinct spatial heterogeneity.