Rapidan River Subbasin (UVA CE-6230)

This resource models outflow at USGS station 01665500 using HEC-HMS software. Precipitation data was imported from the Charlottesville-Albemarle regional airport, which is located about 13 miles northeast of the outflow gage. SCS-curve number, SCS Unit Hydrograph, baseflow recession, and Muskingum routing methods were selected in HEC-HMS. No canopy or surface method was used. The model was calibrated using a precipitation event on 05/05/2016, and tested using an event from 4/19-20/2015. Results show an underestimation of peak outflow of 15% compared to observed data for one model test. The most significant discrepancy between the model and observed outflow is peak flow time, which is likely due in large part to the 13 mile distance between precipitation and outflow gages. Differences may also be due to varying antecedent moisture conditions. This project was an assignment for CE-6230 (Hydrology) at the University of Virginia.

本资源通过 HEC-HMS 软件模拟了美国地质调查局（USGS）站点 01665500 的径流输出。降水数据源自位于输出流量计量器东北方向约 13 英里处的夏洛茨维尔-阿伯马尔地区机场。在 HEC-HMS 中选用了 SCS 曲线编号、SCS 单位洪水过程线、基流消退以及 Muskingum 路由方法。未采用冠层或地表方法。模型通过 2016 年 5 月 5 日的降水事件进行校准，并使用 2015 年 4 月 19-20 日的降水事件进行测试。结果显示，与观测数据相比，该模型在单个模型测试中对峰值径流的低估达到了 15%。模型与观测径流之间最显著的差异在于峰值流量时间，这很可能在很大程度上是由于降水计量器和输出流量计量器之间 13 英里的距离所致。差异也可能与不同的前期湿度条件有关。此项目是弗吉尼亚大学 CE-6230（水文学）课程的一项作业。