Hydraulic model (HEC-RAS) of downstream of Tuttle Creek Reservoir at the confluence of the Big Blue River and the Kansas River near Manhattan, KS

A 2D Hydraulic model (HEC-RAS) for below Tuttle Creek Reservoir at the confluence of the Kansas River and the Big Blue River near Manhattan, KS is presented. Model geometry is based on United States Geological Survey (USGS) 3DEP data (2015), with underwater bathymetry “burned” in using cross-sections sampled in the field in April of 2023. The model was calibrated based on water surface measured during data collection. The hydraulic simulations correspond to streamflows during which fish monitoring data were collected by researchers at Kansas State University (L. Rowley and K. Gido, to be published). Results from the hydraulic model, coupled with a sediment transport model, will be used to study fish and macroinvertabrate ecological response to streamflow., The following is a summary of data utilized for developing a bathymetric terrain for 2D hydraulic modeling using HEC-RAS. Data used for model calibration and validation is also discussed.
 
Available Data
Cross-section elevation data were collected by the United States Army Corps of Engineers (USACE) Kansas City District at approximately 200-foot to 1000-foot increments at the confluence of the Big Blue River and the Kansas River near Manhattan, Kansas. The following equipment was used by two complete surveying teams:
• Ohmex SonarMite single beam echo sounder SFX @ 200khz, 
• Ohmex SonarMite single beam echo sounder DFX @ 28kHz & 200kHZ, 
• Trimble R12i 0096 & 0098, 
• Trimble R8 1984 & 6282
 
The cross-section elevation data were collected by boat and supplemented by hand-carried, pole-mounted Trimbles on April 10 to 14, 2023. The USGS gage on the Big Blue River near Manhattan, KS (06887000) had an average discharge of 425 cfs during the field collection time period (Figur..., , # Hydraulic model (HEC-RAS) of downstream of Tuttle Creek Reservoir at the confluence of the Big Blue River and the Kansas River near Manhattan, KS

[https://doi.org/10.5061/dryad.k3j9kd5gr](https://doi.org/10.5061/dryad.k3j9kd5gr)

## Description of the data and file structure

Many of the files are specific to HEC-RAS and may be opened with HEC-RAS 6.3.1 or later version. HDF (Hierarchical data format) are datasets that can be opened with an alternative software such as that provided by [https://support.hdfgroup.org/products/java/hdfview/](https://support.hdfgroup.org/products/java/hdfview/)

(Enclosed files listed alphabetically)

* Backup.p01: HEC-RAS-generated backup of the Plan file. This associates inputs with simulation options in HEC-RAS
* LandcoverB_122223.hdf: Contains the landcover used for the simulation.
* LandcoverB_122223.tiff: Landcover for the simulation in a raster format.
* Terrain_121123.hdf: Contains the terrain used for the simulation, bathymetry was \"burned\" in a...