Atkinson, A. A. 20260430 Model archive Rolla, MO U.S. Geological Survey https://doi.org/10.5066/P13NSPHQ Allison A. Atkinson 20260519 publication Scientific Investigations Report vol. 2026-5017 https://pubs.usgs.gov US Geological Survey https://doi.org/10.3133/sir20265017 The U.S. Geological Survey (USGS), in cooperation with the City of Lee's Summit, Missouri, assessed flooding of the East Fork Little Blue River and associated tributaries resulting from varying precipitation magnitudes and durations, antecedent soil moisture conditions, and channel conditions. The precipitation scenarios were used to develop a library of flood-inundation maps, depth rasters, water-surface elevation rasters, and point-velocity values that included a 2.95-mile reach of the East Fork Little Blue River and tributaries within the City of Lee's Summit. A U.S. Army Corps of Engineers Hydrologic Engineering Center-River Analysis System (HEC-RAS; version 6.5) 2D "Rain-on-Grid" model was used to assess the streamflow magnitudes associated with simulated precipitation amounts and the resulting flood-inundation conditions, depths, water-surface elevations, and point velocity values. The model was calibrated to the April 28, 2024, May 2, 2024, and July 1, 2024, runoff events representing a range of antecedent moisture conditions and basin responses. The model was then used to simulate rainfall events based on design rainfalls from 15-minute to 24-hour durations and ranging from a 100- to 0.1-percent annual exceedance probability. Flood-inundation maps were produced for water-surface elevations from 884-feet at a reference point (near bankfull) to 897-feet at the reference point, or a water-surface elevation approximating the 0.1-percent annual exceedance probability precipitation with wet antecedent conditions. The consequence of each precipitation duration frequency value was represented by a 1-foot increment inundation map based on the generated water-surface elevation at the East Fork Little Blue River reference location. Fourteen flood-inundation maps and accompanying depth rasters, water-surface elevation rasters, and point velocity values were created. This data release includes: (1) Depth_Rasters.zip file containing fourteen raster dataset files, Depth_X.tif where X = 884 - 897 corresponding to fourteen 1-foot increment flood-inundation maps; (2) WSEL_Rasters.zip file containing fourteen water-surface elevation rasters, WSEL_X.tif where X = 884 - 897, of the water-surface elevations at the East Fork Little Blue River reference location water-surface elevations of 884-feet ot 897-feet, corresponding to fourteen 1-foot increment flood-inundation maps; (3) Velocity_locations_at_hydraulic_structures.zip file containing a shapefile dataset of the locations of the hydraulic structures found in the East Fork Little Blue River and associated tributaries; (4) EFLB_summary_tables.zip file containing tables summarizing the model results including the flood-inundation map condition of each model scenario for dry (CNI; EFLB_summary_table_1_1.csv), normal (CNII; EFLB_summary_table_1_2.csv), and wet (CNIII; EFLB_summary_table_1_3.csv) antecedent soil moisture conditions; (5) EFLB_model_performance_calibration_metrics.zip file containing the tables of model performance and calibration metrics, locations of continuous pressure transducers (EFLB_PT_locations.zip) and the discharge measurement location (RF1; ELFB_discharge_measurement_location.zip) used in assessment of model calibration and validation and time series of the pressure transducer data (EFLB_PT_time_series.zip); (6) Velocities_at_hydraulic_structures.csv file containing the velocities at the hydraulic structures for the discharge measurement location water-surface elevations of 884-feet to 897-feet; (7) EFLB_inundation_extents.zip file containing the shapefile (polyLS_Project_2025.shp) dataset of the streamflow inundation extents at the East Fork Little Blue River reference location water-surface elevations of 884-feet to 897-feet; (8) LS_studybounds.zip file containing boundsLeesSummit.shp, a polyline shapefile indicating the study area boundaries; (9) EFLB_Dry.zip file containing 2D "Rain-on-Grid" model run files used in the simulation of dry hydrologic response conditions (CNI conditions); (10) EFLB_Wet.zip file containing 2D "Rain-on-Grid" model run files used in the simulation of wet hydrologic response conditions (CNIII conditions); (11) EFLB_Normal.zip file containing 2D "Rain-on-Grid" model run files used in the simulation of normal hydrologic response conditions (CNII conditions); (12) EFLB_Climate_and_Calibration.zip file containing 2D "Rain-on-Grid" model run files used in the simulation of climate scenarios and calibration scenarios. Associated Scientific Investigations Report: -------------------------------------- Atkinson, A. A., Precipitation-Based Flood-Inundation Maps for the East Fork Little Blue River and Tributaries at Lee’s Summit, Missouri: U.S. Geological Survey Scientific Investigations Report 2026-XXXX, x p., https://doi.org/10.3133/sir2026-XXXX. These data were generated as part of a U.S. Geological Survey study, done in cooperation with the City of Lee's Summit, Missouri, to develop flood-inundation and water-depth maps associated with precipitation derived flood peaks. A two-dimensional hydrologic-hydraulic model was developed to simulate flood peaks for various precipitation magnitudes and durations and to generate flood-inundation extents and water depths. 20240427 20240702 Range of collected time series data and geospatial data products Complete None planned -94.38000 -94.31000 38.94000 38.89000 USGS Thesaurus geospatial analysis modeling hydraulic engineering Common geographic areas Missouri USGS Metadata Identifier USGS:682b8d4fd4be024992ebd778 Geographic names Information System (GNIS) Missouri Lee's Summit East Fork Little Blue River None. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Allison A Atkinson Central Midwest Water Science Center Civil Engineer mailing and physical

MO WSC Kansas City Field Office, Victory Park LLC

Lees Summit MO 64086 816-554-3489 aatkinson@usgs.gov The model was calibrated to the April 28, 2024, May 2, 2024 and July 1, 2024, runoff events. The parameters CN and Manning's n were the primary parameters used in calibrating the simulated hydrograph peak and shape. Final calibration results indicated similarity in simulated and observed hydrographs. The Nash-Sutcliffe efficiency (NSE) coefficient was used to assess model fit. Values of NSE can vary from negative infinity (∞) to 1. Values of 1 correspond to a perfect match between simulated and observed time series whereas values less than 0 indicate the observed average is a better predictor than the simulated values. The NSE values of the calibrated models for the April 28, 2024; May 2, 2024, and July 1, 2024, storms were about 0.85, 0.82, and 0.94, respectively, indicating a good fit for all storms. Simulated and observed streamflow and date and time of peak were also compared for each storm. For the April 28, 2024, event, there was a 23.2% difference in observed and simulated streamflow and a 27:00-minute difference in the date and time of peak streamflow. For the May 2, 2024, event, there was a 9.4% difference in observed and simulated streamflow and an 18:00- minute difference in the observed and simulated date and time of peak streamflow. For the July 1, 2024, event, there was a 7.3% difference in observed and simulated streamflow and a 12:00-minute difference in the observed and simulated time of peak streamflow. Finally, the differences between the observed and simulated peak water surface elevations at each pressure transducer and the streamflow measurement location were recorded. For the April 28, 2024, storm, the differences ranged from 0.04-feet to 1.26-feet. For the May 2, 2024, storm, the differences ranged from 0.06-feet to 0.35-feet. For the July 1, 2024, storm, the differences ranged from 0.04- to 0.73-feet. The results demonstrate that the model is capable of simulating accurate water levels throughout the reach. There are no unclosed polygons or intersections without nodes. Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Not applicable Not applicable A 2D "Rain-on-Grid" combined hydrologic and hydraulic model was used to simulate peak streamflow for part of the East Fork Little Blue River basin using design rainfall events covering a range of magnitudes and probabilities for exceedance. The model was constructed using the U.S. Army Corps of Engineers (USACE) modeling system Hydrologic Engineering Center-River Analysis System (HEC-RAS) version 6.5. The HEC-RAS model was calibrated to the April 28, 2024, May 2, 2024, and July 1, 2024, storm events at three pressure transducer locations and the streamflow measurement location. The calibrated HEC-RAS model was then used to simulate precipitation-runoff and water-surface profiles from design rainfall events covering a range of 15-minutes to 24-hours duration and annual exceedance probabilities of 1-percent to 0.1-percent for three different antecedent moisture conditions. Output profiles were used to develop inundation polygons, depth grids, and water-surface elevation grids associated with streamflow conditions ranging from approximately bankfull conditions to the stage corresponding to the 1000-year 24-hour duration rainfall event with wet antecedent conditions. 20240801 Geospatial products including the inundation polygons, depth grid rasters, and water-surface elevation grid rasters were developed by associating the water-surface elevation of each simulated scenario with an elevation-stage condition at a reference location along the East Fork Little Blue River just downstream of Scruggs Road. Based on the peak water-surface elevation, the modeled scenarios were assigned to fourteen flood-inundation maps produced for reference stages of 3.0-feet (elevation of 884.0-feet NAVD88), or near bankfull, to 16.0-feet (elevation of 897-feet NAVD88), or a stage exceeding the 0.1-percent annual exceedance probability interval precipitation with wet conditions. The consequence of each precipitation duration-frequency value was represented by a 1.0-foot increment inundation map based on the generated peak water-surface elevation from that rainfall event at the streamflow measurement location. 20250105 Depth_X.tif Rasters indicating water depths associated with flood-inundation maps. Raster files 884, 885, 886, 887, 888, 889, 890, 891, 892, 893, 894, 895, 896, and 897 correspond to flood inundation maps 884, 885, 886, 887, 888, 889, 890, 891, 892, 893, 894, 895, 896, and 897. Located within the "Depth_Rasters.zip" file. Producer Defined Flood inundation water depth grids Water depth, in feet Producer Defined 0.00 19.68 feet WSEL_X.tif Rasters indicating water-surface elevations associated with flood-inundation maps. Raster files 884, 885, 886, 887, 888, 889, 890, 891, 892, 893, 894, 895, 896, and 897 correspond to flood inundation maps 884, 885, 886, 887, 888, 889, 890, 891, 892, 893, 894, 895, 896, and 897. Located within the "WSEL_Rasters.zip" file. Producer Defined Flood inundation water-surface elevation grids Water-surface elevation, in feet Producer Defined 880.06 1023.10 feet Velocity_locations_at_hydraulic_structures.shp Shapefile containing polylines showing the locations of hydraulic structures along the East Fork Little Blue River. Located within in the "Velocity_locations_at_hydraulic_stuctures.zip" file. Producer Defined FID Internal feature number Producer Defined Sequential unique whole numbers that are automatically generated. Shape Feature geometry type Producer Defined Name Model name of hydraulic structure Producer Defined RoadName Name of the road that crosses the hydraulic structure Producer Defined EFLB_summary_table_1_1.csv Comma Separated Values (CSV) file containing the summary of peak streamflow characteristics for dry antecedent soil moisture conditions generated using varying precipitation recurrence intervals and durations using the HEC-RAS two-dimensional "Rain-on-Grid" hydrologic and hydraulic model. Located within the "EFLB_summary_tables.zip". Producer Defined Rainfall recurrence interval and duration precipitation frequency and duration Producer Defined Recurrence interval, in years, and duration in hours Rainfall total, in inches rainfall total, in inches Producer Defined 0.74 13.5 inches Time of centroid of rainfall from beginning of event, hours:minutes Time of the centroid of the rainfall relative to the beginning of the rainfall event Producer Defined rainfall from beginning of event, hours:minutes time in hours:minutes Producer defined Simulated peak streamflow at streamflow measurement location, in ft NAVD88 Simulated peak streamflow, in cubic feet per second, at the streamflow measurement location for the wet antecedent runoff condition. Simulated peak streamflow, in cubic feet per second, at the streamflow measurement location for the dry antecedent runoff condition Producer Defined Peak streamflow, in cubic feet per second. Flood-inundation map corresponding to simulated peak water-surface elevation at streamflow measurement location, in feet Corresponding flood-inundation map water-surface elevation at streamflow measurement location for normal antecedent runoff conditions Producer Defined -- No Data Producer defined 884 895 feet Simulated time of peak streamflow since start of rainfall, in hours:minutes:seconds Time of streamflow peak relative to the start time of precipitation Producer Defined Time of peak streamflow since the beginning of the precipitation event, in hh:mm:ss EFLB_summary_table_1_2.csv Comma Separated Values (CSV) file containing the summary of the peak streamflow characteristics for normal antecedent soil moisture conditions generated using varying precipitation recurrence intervals and durations using the HEC-RAS two-dimensional "Rain-on-Grid" hydrologic and hydraulic model. Located within the "EFLB_summary_tables.zip" file. Producer Defined Rainfall recurrence interval and duration precipitation frequency and duration Producer Defined Recurrence interval, in years, and duration in hours Rainfall total, in inches rainfall total, in inches Producer Defined 0.74 13.5 inches Time of centroid of rainfall from beginning of event, hours:minutes Time of the centroid relative to the beginning of the rainfall event. Producer Defined rainfall from the beginning of event, hours:minutes time, in hours:minutes Producer defined Simulated peak streamflow at streamflow measurement location, in ft NAVD88 Simulated peak streamflow, in cubic feet per second, at the streamflow measurement location for the normal antecedent runoff condition Producer Defined Peak streamflow, in cubic feet per second Flood-inundation map corresponding to simulated peak water-surface elevation at streamflow measurement location, in feet Corresponding flood-inundation map water-surface elevation at streamflow measurement location for normal antecedent runoff conditions Producer Defined -- No Data Producer defined 884 896 feet Simulated time of peak streamflow since start of rainfall, in hours:minutes:seconds Time of streamflow peak relative to the start time of precipitation Producer Defined Time of peak streamflow since the beginning of the precipitation event, in hh:mm:ss EFLB_summary_table_1_3.csv Comma Separated Value (CSV) file containing the summary of peak streamflow characteristics for wet antecedent soil moisture conditions generated using varying precipitation recurrence intervals and durations using the HEC-RAS two-dimensional "Rain-on-Grid" hydrologic and hydraulic model. Located within the "EFLB_summary_tables.zip" file. Producer Defined Rainfall recurrence interval and duration precipitation frequency and duration Producer Defined Recurrence interval, in years, and duration in hours Rainfall total, in inches rainfall total Producer Defined 0.74 13.5 inches Time of centroid of rainfall from beginning of event, hours:minutes Time of the centroid of the rainfall relative to the beginning of the rainfall event Producer Defined rainfall from beginning of event, hours:minutes time, in hours:minutes Producer defined Simulated peak streamflow at streamflow measurement location, in ft NAVD88 Simulated peak streamflow, in cubic feet per second, at the streamflow measurement location for the wet antecedent runoff condition Producer Defined Peak streamflow, in cubic feet per second Flood-inundation map corresponding to simulated peak water-surface elevation at streamflow measurement location, in feet Corresponding flood-inundation map water-surface elevation at streamflow measurement location for the wet antecedent runoff conditions Producer Defined -- No Data Producer defined 884 897 feet Simulated time of peak streamflow since start of rainfall, in hours:minutes Time of streamflow peak relative to the start time of precipitation Producer Defined Time of peak streamflow since the beginning of the precipitation event, in hh:mm:ss EFLB_PT_locations.shp Shapefile containing the locations of three pressure transducers used to collect water-level time series. Located within the "EFLB_model_performance_calibration_metrics.zip" file. Producer Defined FID Internal feature number ESRI Sequential whole numbers that are automatically generated. Shape Feature geometry ESRI Shape type = point data Name Name of a pressure transducer Producer Defined EFLB1 Pressure transducer at location 1 used for model calibration Producer defined EFLB2 Pressure transducer at location 2 used for model calibration Producer defined EFLB3 Pressure transducer at location 3 used for model calibration Producer defined EastForkLittleBlueRiver_EFLB1_time_series.csv Comma Separated Values (CSV) file containing data. Located within the "EFLB_model_performance_calibration_metrics.zip" file. Producer Defined Date Date of water level reading in MM/DD/YYYY format Producer Defined Date of water-level readings collected at pressure transducer location 1 (EFLB1). Time Time of water level reading in HH:MM:SS Producer Defined Time of water-level readings collected at pressure transducer location 1 (EFLB1). Level, ft Atmospheric pressure corrected water level reading, in feet Producer Defined 0.05 6.37 feet Datum, ft Datum of pressure transducer, in feet above NAVD88 Producer Defined 884.05 884.05 feet Elevation, ft Elevation of water level reading in feet above NAVD88 Producer Defined 884.10 890.42 feet EastForkLittleBlueRiver_EFLB2_time_series.csv Comma Separated Values (CSV) file containing data. This file is located in the "EFLB_model_performance_calibration_metrics.zip" file. Producer Defined Date Date of water level reading in MM/DD/YYYY format Producer Defined Date of water-level readings collected at pressure transducer location 2 (EFLB2). Time Time of water level reading in HH:MM:SS Producer Defined Time of water-level readings collected at pressure transducer location 2 (EFLB2). Level, ft Time of water level reading in HH:MM:SS Producer Defined -0.02 5.79 feet Datum, ft Datum of pressure transducer, in feet above NAVD88 Producer Defined 900.39 900.39 feet Elevation, ft Elevation of water level reading in feet above NAVD88 Producer Defined 900.37 906.18 feet EastForkLittleBlueRiver_EFLB3_time_series.csv Comma Separated Values (CSV) file containing data. Located within the "EFLB_model_performance_calibration_metrics.zip" file. Producer Defined Date Date of water level reading in MM/DD/YYYY format Producer Defined Date of water-level readings collected at pressure transducer location 3 (EFLB3). Time Time of water level reading in HH:MM:SS Producer Defined Time of water-level readings collected at pressure transducer location 3 (EFLB3). Level, ft Atmospheric pressure corrected water level reading, in feet Producer Defined -0.28 4.52 feet Datum, ft Datum of pressure transducer, in feet above NAVD88 Producer Defined 917.56 917.56 feet Elevation, ft Elevation of water level reading in feet above NAVD88 Producer Defined 917.28 922.08 feet Velocities_at_hydraulic_structures.csv Comma Separated Values (CSV) table showing the velocities at hydraulic structures associated with inundation extent maps. Producer Defined Name of hydraulic structure Name of the hydraulic structure and associated street Producer Defined Name of the hydraulic structure where the streamflow velocity occurs. Name follows the convention "ModelName - Street Name". Related Map Inundation Map associated with the velocity Producer Defined 884 - 897 Map associated with the velocity Producer defined Associated velocity, feet per second Velocity derived from the HEC-RAS 2D "Rain-on-Grid" model at the hydraulic structure location Producer Defined 0.2 16.4 feet per second polyLS_Project_2025.shp Shapefile containing polygons showing the extent of flood inundation for each corresponding 1.0-foot increment in stage at the streamflow measurement location. Located within the "EFLB_inundation_extents.zip" file. Producer Defined FID Internal feature number ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry ESRI Shape type = polygon STAGE Stage of flood-inundation polygon, in feet Producer Defined 3.0 16.0 feet ELEV Elevation of water-surface at the streamflow measurement location, in feet above the vertical datum of 1988. Producer Defined 884.0 897.0 feet USGSID U.S. Geological Survey station identifier Producer Defined <<empty cell>> The reference location for these maps is not in a U.S. Geological Survey streamgage so this field is blank. Producer defined blank GRIDID Depth grid identifier Producer Defined 3 16 QCFS Streamflow associated with the flood-inundation map, in cubic feet per second Producer Defined 360 13300 Cubic feet per second boundsLeesSummit.shp Shapefile containing polylines showing the end locations of the study reach along the East Fork Little Blue River. Located within the "LS_studybounds.zip" file. Producer Defined FID Internal feature number ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry type ESRI A polyline defining the end locations of the study reach. ID Feature ID Producer Defined 0 0 BdryCdtn Indicates whether the polyline is an inflow or outflow boundary condition Producer Defined "Outflow boundary condition" indicates that the polyline is an outflow boundary condition. "Inflow boundary condition" indicates that the polyline is an inflow boundary condition. The entity and attribute information provided here describes the tabular data associated with the data set. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the data set. Atkinson, A. A., 2026, Geospatial data and model archives associated with precipitation-driven flood-inundation mapping of the East Fork Little Blue River and associated tributaries at Lee's Summit, Missouri: U.S. Geological Survey data release, https://doi.org/10.5066/P13NSPHQ. U.S. Geological Survey GS ScienceBase mailing address

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Digital Data https://doi.org/10.5066/P13NSPHQ None 20260519 Allison A Atkinson Central Midwest Water Science Center Civil Engineer mailing and physical

MO WSC Kansas City Field Office, Victory Park LLC

Lees Summit MO 64086 816-554-3489 aatkinson@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998