SGER: Iowa Flood Mapping by Airborne Laser Swath Mapping

SGER：通过机载激光测绘绘制爱荷华州洪水测绘

• 批准号: 0848400
• 负责人: Ramesh Shrestha
• 金额: $ 9.9万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-15 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0848400&HistoricalAwards=false
• 关键词: SGER; Iowa; Flood; Mapping; Airborne

0848400ShresthaThe PI requests funding to overfly the Iowa River corridor to capture imagery of the 2008 Midwestern flood ? a potential 500 year extreme event. The overflights are scheduled for 19-21 June 2008 and will use airborne laser swath mapping to carefully analyze flooded areas in Iowa. The objectives are to interface the lidar-based map products with soil erosion models in order to determine sediment load provided to the watershed outlet (Gulf of Mexico), to refine estimates for total nitrogen washout from agricultural lands using both mapping and in situ measurements, to better understand drainage channel geometry in the flooded watershed, and to constrain the drainage channel hill slope morphology in order to refine water residence time modeling. The unique aspect of the proposed research is the ability to combine large-scale high resolution mapping technology to understand a rare (perhaps 500 year) flooding event. Using lidar mapping, the PI may feed geomophological data into large scale two-dimensional flood wave propagation models within the Iowa River watershed. In addition, high-resolution bathymetry data will be coupled with high-resolution free-surface maps in order to follow post-flood changes in the main channel morphology. Ultimately, the high-resolution mapping products will be incorporated into predictive models to assist managers at all levels, from civic planning to emergency response. The magnitude of flooding observed in Iowa demonstrated the limitations of current FEMA 100-year and 500-year flood maps, primarily caused by poor accuracy and resolution. High-resolution mapping will provide managers with the tools needed to model and understand the 2008 Midwestern flood and will provide a basis for better understanding river morphology. Data will also be useful in estimating nutrient loading to the Gulf of Mexico which may impact the dynamics of the dead zone. With billions of dollars lost each year, more accurate flood and geomorphology data are timely and of broad interest.***

0848400SHRESTHATHE PI要求向爱荷华河走廊上空筹集资金以捕捉2008年中西部洪水的图像吗？潜在的500年极限事件。飞行时间定于2008年6月19日至21日举行，将使用机载激光饰面映射来仔细分析爱荷华州洪水泛滥的地区。目的是将基于LIDAR的地图产品与土壤侵蚀模型接口，以确定提供给分水岭出口的沉积物负荷（墨西哥湾），以优化使用映射和原位测量的农业土地上从农业土地上进行总氮的估算值，以更好地理解水流的水流，并在洪水泛滥的水流中分散了流水量的水流，并构成了泛滥的水流，并构成了泛滥的水域，并构成了水的汇集。时间建模。拟议的研究的独特方面是能够结合大规模高分辨率映射技术以了解罕见（也许是500年）的洪水事件的能力。使用LiDAR映射，PI可以将地球学数据馈入爱荷华河流域内的大规模二维洪水传播模型。此外，高分辨率的测深数据将与高分辨率的自由表面图结合在一起，以遵循主通道形态的洪水后变化。最终，高分辨率映射产品将被纳入预测模型中，以协助从公民规划到应急响应的各个级别的经理。在爱荷华州观察到的洪水幅度证明了当前FEMA 100年和500年洪水图的局限性，这主要是由于准确性和分辨率较差而引起的。高分辨率映射将为管理人员提供建模和了解2008年中西部洪水所需的工具，并将为更好地理解河流形态提供基础。数据也将有助于估算墨西哥湾的养分负荷，这可能会影响死区的动态。每年损失数十亿美元，更准确的洪水和地貌数据是及时且引起了人们的广泛关注。***