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Public Works

Phone: 913-715-8300

1800 W Old Highway 56, Olathe, KS 66061

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Useful Reports

Below is a list of reports completed on behalf of, in conjunction with, or using data provided by the Johnson County Stormwater Management Program.

Understanding NOAA Atlas 14, Vol. 8 June 2013 - Presentation on new NOAA Precipitation Frequency Estimates for the Kansas City Metropolitan Area

Calibration of Hydrologic Design Inputs for a Small Urban Watershed in Johnson County, Kansas October 2011 - The design of stormwater drainage, detention and BMP systems requires realistic values of hydrologic inputs such as Rational C factors, runoff curve numbers and volumetric runoff coefficients. In this report researches utliized gage data from a small urban watershed to calibrate hydrologic lag times, Rational C values, and runoff curve numbers.

Guidelines for Continuous Simulation of Streamflow in Johnson County, Kansas, with HEC-HMS June 2010 - Continuous simulation of streamflow is useful for predicting the streamflow impacts of land-use changes and stormwater management practices. This report provides guidance for continuous simulation of streamflow in Johnson County with the HEC-HMS Hydrologic Modeling System of the U.S. Army Corps of Engineers.

Flood Routing on Small Streams: A Review of Muskingum-Cunge, Cascading Reservoirs, and Full Dynamic Solutions This report presents flood wave routing methods that have been adapted for small, naturally meandering streams. Two approximate flood wave routing methods are evaluated against two “fully dynamic” solutions on four natural streams in northeastern Kansas.

Rock Creek Watershed Planning Final Feasibility Report This report includes the stream assessment methodology and results, recommended stream restoration projects, a presentation of BMP concepts, an implementation strategy for best management practices throughout the watershed and probable costs associated with these projects.

Local Applications of Fluvial Geomorphology Attempts at stream stabilization, either using ‘hard’ structural methods or ‘green’ geomophologically-based methods can be successful if a careful approach is chosen. This study proposed a method for developing regional curves based solely on hydraulic modeling. Regional curves relate bankfull channel geometry and discharge to drainage area and are typically used to design channel reaches in natural stream systems at locations where stream modifications are required to accommodate improved drainage structures or to address flooding, scour or erosion problems.