近30年杭嘉湖平原湿地格局变化研究  

On the Wetland Pattern Changes in Hangjiahu Plain

作　　者：庞毓雯 吴文渊[1,2] 金城[1] 胡潭高[1,2] 宋瑜[1,2] 徐俊峰[1,2] 

机构地区：[1]杭州师范大学理学院,浙江杭州310036 [2]浙江省城市湿地与区域变化研究重点实验室,浙江杭州311121

出　　处：《杭州师范大学学报（自然科学版）》2016年第4期420-426,共7页Journal of Hangzhou Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(41402304);国家级大学生创新创业训练计划项目(201510346012);浙江省自然科学基金项目(Q13D020005)

摘　　要：使用1993年、2003年、2008年和2015年4期Landsat TM/OIL影像,对杭嘉湖平原区进行土地利用/覆被变化(LUCC)分析.结果表明:1)1993—2015年,湿地面积持续减少,总缩幅高达46.14%,主要受城市化进程影响;2)1993—2003年,城市面积由50.18km2扩增至118.13km2,湿地面积同期缩小99.2km2;3)2003—2008年,湿地退化程度较其他时期更为明显,总缩幅达51.09%,减少的湿地类型主要转变为城市和休耕地;同样城市扩张也最为显著,年均增长近30%;4)2008—2015年,在整治政策的保护下,湿地面积实现正增长,年平均增幅为6.32%.总体而言,杭嘉湖平原湿地格局变化受自然因素和社会因素共同作用,但人为因素占主导,2008年之前侧重城镇发展,将湿地用地变为城镇或农业用地,近年来在政策引导下,推动湿地保护,使其面积有所增加.In this study, four I.andsat TM/OLI images in 1993, 2003, 2008 and 2015 were used to make LUCC analysis in Hangjiahu plain. The results showed that from 1993 to 2015, the great areas of wetland decreased gradually, with total area decreasing from 418. 88 km2 to 225. 69 km2, the reduction up to 46. 14%, which was drastically affected by urbanization. The urban areas increased from 50.18 km2 to 118.13 km2 within the period from 1993 to 2003, while the areas of wetland reduced 99. 2 km2. From 2003 to 2008, wetland attenuation was the most obvious than other periods, the reduction up to 51.09 %, the reduced wetland types were mainly converted to urban and fallow farmland. Meanwhile, the urban expansion was more significant than other stages, its average annual growth rate was nearly 30%. The protection policy made the wetland area achieve positive growth, the average annual increase was 6.32% within the period of 2008 to 2015. In a few words, wetland pattern changes were affected by natural factors and social factors, while the human disturbance activity was the dominant factor. Prior to 2008, the focus was on urban development, and transforming wetland to urban or agricultural lands. But in recent years, under the policy adjustments, wetland protection was concerned to increase its area.

关 键 词：杭嘉湖 湿地遥感 格局变迁 LANDSAT TM/OLI 

分 类 号：P942[天文地球—自然地理学]