The Use of Spatial Information Systems, Historic Remote Sensing and Retro-Modeling to Assess Man-Made Changes to the Mississippi River System
A wealth of historical hydrological and geospatial data exists for the Mississippi River system. Maps, charts, surveys, structure-history databases, and other quantitative measurements stretch back 100-200 years and longer. The major challenge in using these data is their native format and state of decentralization (e.g., non-digital and many parts in many places). In order to better utilize these data, we have constructed hydrologic and geospatial databases for the navigable Mississippi River (St. Paul, MN to the Gulf of Mexico), the Lower Missouri River (Sioux City, IA to the Missouri-Mississippi confluence), and the Illinois River from Lockport, IL to the Mississippi-Illinois confluence (a combined total of ＞4,500 river km). To date we have digitized 38 high-resolution hydrographic surveys maps sets, 40 other map sets, ～6 million stage and 1 million discharge observations. Approximately 60％ of these map sets have been georeferenced, standardized to a uniform coordinate system and datum, and stored in a CIS-based database.The use of these archival spatial data sets can be called historical remote sensing because they provides images and information about the river system that extend recent spatial imagery and hydrologic data far back in time. We use this historical remote sensing data to assess 19th and 20th century river change and corresponding flood response along the Mississippi River system. One approach we use is retro-modeling. Retro-modeling involves the use of archival hydrologic and geospatial data in computational hydraulic models, such as HEC-RAS, to assess historical conditions. Comparison of modern conditions with modeled historical reference conditions provides a rigorous assessment of change.
Jonathan W.F. Remo Nicholas Pinter
Environmental Resource and Policy Program, Southern Illinois University, Carbondale 62901-4324, USA;Department of Geology, Southern Illinois University, Carbondale 62901-4324, USA
国际会议
The 12th Conference of the International Association for Mathematical Geology(第12届国际数学地质大会)
北京
英文
286-288
2007-08-26（万方平台首次上网日期，不代表论文的发表时间）