基于数字高程模型的鄱阳湖淹水范围制图研究  

Inundation Extent Mapping for Poyang Lake with Digital Elevation Models

作　　者：齐述华[1,2] 顾中宇[1,2] Daniel Brown 姜鲁光[4] 

机构地区：[1]江西师范大学地理与环境学院,南昌市紫阳大道99号330022 [2]江西师范大学鄱阳湖湿地与流域研究教育部重点实验室,南昌市紫阳大道99号330022 [3]School of Natural Resources and Environment,University of Michigan,annarborusa48109 [4]中国科学院地理科学与资源研究所,北京市朝阳区大屯路甲11号100101

出　　处：《武汉大学学报（信息科学版）》2010年第7期857-862,共6页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(40801169);国家科技支撑计划重点资助项目(2007BAC23B05);江西省科技厅项目"鄱阳湖湿地生态系统动态监测"资助项目

摘　　要：利用13幅Landsat TM/ETM+鄱阳湖区遥感影像,提取不同水位下的淹水范围,根据淹水面积与湖内7个水文站水位相关性,确定都昌水文站水位能够最好控制鄱阳湖水面范围。为了改善中低水位条件下淹水范围的制图精度,将遥感提取的水体边界作为水位等值线,插值建立鄱阳湖基于水体边界的数字高程模型(taterline-based DEM,WL_DEM),利用WL_DEM和都昌水位实现中低水位淹水范围制图。结果表明,中低水位条件下,基于WL_DEM的淹水范围制图精度都有显著提高。In this paper,Landsat TM/ETM＋ images taken on 13 different dates were used to pick up the inundation extent and the inundation area were related with the lake levels measured at the 7 hydrological stations.Lake levels from Duchang station have the best correlation with the inundation area.With the contour based digital elevation model（CB_DEM） and CB_DEM,the inundation extent were mapped and compared with the remotely sensed inundation extent.It showes reasonably accurate for high lake levels but not for medium and low lake levels.Boundaries of the remotely sensed inundation extents were labeled with simultaneous lake-level measurements taken at a Duchang hydrological station and interpolated to create a Waterline based DEM（WL_DEM）.And the Duchang lake levels and WL_DEM were used to map the inundation extent for medium and low lake level.It showes that the accuracy were improved by using WL_DEM at medium lake levels,but had relatively high errors at low lake levels.

关 键 词：鄱阳湖 淹水范围 遥感 DEM 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P237.9[天文地球—测绘科学与技术]