Collaborative Research: Use of NEXRAD Data to Estimate Rainfall Rate and Rainfall Kinetic Energy Flux

小行星9506391布尔日 拟议的研究将侧重于描述降水及其侵蚀力的各个方面。这项工作将展示如何利用雷达同时提供降雨率和降雨动能，同时覆盖大面积的高空间和时间分辨率。 降雨强度和动能是与土壤侵蚀有关的降水的特征，必须准确监测，以获得更好的土壤流失估计。 相对稀疏的雨量计网络已被用来估计长期的土壤流失。 使用雷达的最大潜在好处之一是扩大这种稀疏测量网络，为易受侵蚀的地区提供全面覆盖。 利用WSR-88 D（天气监视雷达-1988多普勒）的下一代天气雷达（NEXRAD）网络提供的新的可用雷达信息，可能会获得更好的估计和更大的灵活性，并创造研究机会。 我们将深入探讨雷达在土壤侵蚀研究中的作用和局限性，并调查降雨率和降雨动能的时空分布。 将进行详细的比较，以测试性能的雷达为基础的方法来估计降水侵蚀力与目前的做法，这完全取决于雨量计记录。 这项研究将在北方密西西比的古德温溪研究流域收集的数据的基础上进行。 这一分水岭在两个NEXRAD WSR-88 D，孟菲斯（田纳西州）和小石城（阿肯色州）的雷达覆盖下。 我们将使用孟菲斯雷达的数据，因为它靠近集水区。 除了现有的雨量计在已经高度仪表化的古德温溪流域，我们将部署一个雨滴尺寸分布的自动测量。

9506391 Burges The proposed research will focus on describing aspects of precipitation and its erosivity. The work will show how to make use of radar to provide rainfall rate and rainfall kinetic energy concurrently, while covering a large area with high spatial and temporal resolution. Rainfall intensity and kinetic energy characterize the aspects of precipitation relevant to soil erosion and have to be monitored accurately to obtain improved soil loss estimates. Relatively sparse networks of raingauges have been used to estimate long-term soil loss. One of the largest potential benefits of using radar is augmenting such sparse gauge networks to provide comprehensive coverage for areas that are subject to erosion. Improved estimation and greater flexibility are likely to be gained and research opportunities created by making use of the newly available radar information provided by the Next Generation Weather Radar (NEXRAD) network of WSR-88D (Weather Surveillance Radar - 1988 Doppler). We will explore in depth the usefulness and limitations of radar for soil erosion studies and investigate and spatial and temporal distributions of rain rate and rainfall kinetic energy. Detailed comparisons will be made to test the performance of the radar-based approach to estimate precipitation erosivity versus present practice which depends exclusively on raingauge records. The study will be made on the basis of data collected in the Goodwin Creek research watershed in northern Mississippi. This watershed is under radar coverage from two NEXRAD WSR-88Ds, Memphis (Tennessee) and Little Rock (Arkansas). We will use data from the Memphis radar because of its proximity to the catchment. In addition to the existing raingauges in the already highly instrumented Goodwin Creek watershed, we will deploy a disdrometer for the automated measurement of raindrop size Distributions.