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Big Blue River near Manhattan, KS (MNTK1)


Data Type




Inundation Levels
NAVD88 Stage

1,029.340.0
1,028.339.0
1,027.338.0
1,026.337.0
Record Crest: 36.04 ft
1,025.336.0
1,024.335.0
1,023.334.0
1,022.333.0
1,021.332.0
1,020.331.0
1,019.330.0

Major Flooding Begins

1,018.329.0
1,017.328.0
1,016.327.0
1,015.326.0
1,014.325.0
1,013.324.0
1,012.323.0

Moderate Flooding Begins

1,011.322.0
1,010.321.0
1,009.320.0
1,008.319.0

Minor Flooding Begins

1,007.318.0
1,006.317.0
1,005.316.0
1,004.315.0

Near Flooding Begins

* = Extended rating
Weather Forecast Office Topeka, KS Missouri Basin River Forecast Center
Hydrograph River at a Glance Download Inundation
Mapping
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Click on mapped inundation to see water depth values for that location, or hold shift and drag to zoom to area.

Current Stage:
2.6 ft at 06/29/2017 12:00:00 UTC
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Inundation Legend
Depth in feet
USGS Gauge Location Gauge Location
What is UTC time? Map Help

Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Gauge Information Collapse

Map Overlays

Flood Categories (in feet)
Major Flood Stage: 30
Moderate Flood Stage: 23
Flood Stage: 19
Action Stage: 15
Low Stage (in feet): -9999

Historic Crests
(1) 36.04 ft on 07/12/1951
(2) 32.71 ft on 07/23/1993
(3) 19.28 ft on 08/07/1992
(4) 18.07 ft on 06/13/1995
(5) 17.73 ft on 05/24/2007
(6) 17.56 ft on 03/22/2001
(7) 16.87 ft on 06/19/2008
(8) 14.98 ft on 06/04/2011
(9) 14.85 ft on 04/02/1998
(10) 14.76 ft on 11/22/1996
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 9.68 ft on 06/10/2014
(2) 10.76 ft on 06/12/2013
(3) 7.89 ft on 04/22/2012
(4) 14.98 ft on 06/04/2011
(5) 14.73 ft on 08/13/2010
(6) 11.06 ft on 10/28/2008
(7) 16.87 ft on 06/19/2008
(8) 17.73 ft on 05/24/2007
(9) 5.53 ft on 10/01/2005
(10) 7.52 ft on 06/22/2005
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.

Site-specific information:
The purpose of a flood forecast inundation map is to communicate flood risk based on best available information at the time of map development. This flood forecast inundation map has been compiled using the best information available and is believed to be accurate; however, its preparation required many assumptions. Actual conditions during a flood event, such as natural phenomena e.g. sedimentation, erosion, debris build-up, cascading escalating risks or man-made interactions, e.g. flood protection measurements from sand bagging to exercising varying flood operation schema may vary from those modeled in the map. The limits of flooding shown should only be used as a guideline for emergency planning and response actions. Actual areas inundated will depend on specific flooding conditions and may differ from the areas shown on the map.

The risk of flooding behind levees depends on many factors that cannot be entirely predicted in advance. These factors include whether the levee overtops, length of time the levee overtops, whether the overtopping leads to breach formation, and whether weakness in the levee or foundation leads to levee breach formation prior to overtopping.

Two distinct approaches to mapping flooding behind levees have been applied to best address the inherent uncertainty. For documented levee systems, sufficient information was available to model a levee overtopping scenario, flooding behind the levees is shown only after river elevations reach the top of levee. For undocumented levee systems, sufficient information was not available to model a levee overtopping scenario, and flooding is shown behind the levee as soon as the river elevation exceeds the ground surface. No specific level of protection is implied for any levee depicted on these maps.

The levee alignments on the maps are based on the most current ground elevation data, collected December 2010, and confirmed with information from the National Levee Database, which is current as of January, 2015.

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Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.