【摘要】 辽河三角洲是我国和亚洲最大的暖温带滨海湿地,盘锦湿地即位于辽河三角洲的核心地带。通过对不同时期卫星遥感资料的对比解译和分类提取,定量分析了近20年盘锦湿地的变化特征;同时从气候变化、土地利用等角度分析了盘锦湿地变化的主要影响因子。结果表明:过去20年来盘锦地区的土地利用格局发生了显著变化,自然湿地正逐渐被农田等人工用地取代,呈现自然湿地面积锐减、人工湿地面积逐渐增多的趋势,变化幅度较大的依次为水体(65.2%)>滩涂(21.1%)>水田(20.1%)。湿地水域面积与年降雨量之间存在极显著的正相关关系。气候暖干化、土地资源的不合理开发利用等自然和人为因素的耦合作用是盘锦湿地退化的主要原因。更多还原

【Abstract】 Liaohe Delta is the largest seacoast wetland of warm temperature zone in both China and Asia,and the Panjin wetland is located in its core area.With the interpretation and information extraction of Landsat imageries of different periods during the past 20 years,the changing characteristics of Panjin wetland has been quantitatively analyzed,and the main influencing factors were also discussed in terms of climate change and land use.The results were as follows.(1) The land use pattern of Panjin has been changed significantly during the past 20 years with the replacement of natural wetland by artificial land use such as cropland.(2) The Panjin wetland was characterized by the sharp decrease of the natural wetland and increase of the artificial wetland,and land use types with more notable changes were water body(65.2%)>shoal(21.1%)>paddy field(20.1%).(3) The water body area shows extremely significant positive correlation with annual precipitation.The warming and drying tendency of climate as well as the improper exploitation and utilization of the land resources were concluded to be the main reason for the degradation of Panjin wetland.更多还原