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Filters: Tags: Sixmile Creek (X) > Types: OGC WMS Layer (X)

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Background / Problem – The City of Ithaca, Tompkins County, N.Y., is in the process of developing a flood management plan for the streams that flow through the City. Flooding in the City is caused by a variety of distinct and sometimes interconnected reasons. Flooding often is a result of snowmelt and rain during the winter and spring. Slow ice-melt and breakup can lead to ice jams and subsequent flooding. Flash floods are produced by summer thunderstorms. All of these flood types are compounded by two factors: the storm-sewer system in the City and the elevation of Cayuga Lake. The storm sewers drain to the nearby streams at points below the tops of the streambanks. Because the streamward ends of the storm sewers...
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Water depths were measured during November 2015 and bathymetric elevations were computed for the lower Sixmile Creek reservoir in Ithaca, Tompkins County, N.Y. These data include ADCP-measured transect data and manually-measured point data collected by the U.S. Geological Survey, Ithaca, N.Y., during November 16-20, 2015. These data were used by the GIS Program, City of Ithaca, N.Y., to create a bathymetric surface (TIN) of the reservoir.
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This dataset contains inundation boundary polygons for 15 modeled water-surface profiles at 5 flood frequencies (50- , 10- , 2- , 1- , and 0.2-percent annual exceedance probabilities, or 2- , 10- , 50- , 100- , and 500-year recurrence intervals) and 3 lake levels (representing average conditions, a 2-year-high condition, and a 100-year-high condition).
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Water depths for the lower Sixmile Creek reservoir in Ithaca, Tompkins County, N.Y. that were measured during 1938 were found in the files of the GIS Program, City of Ithaca. This agency computed bathymetric elevations and created a bathymetric surface (TIN) of the reservoir. A contour-line shapefile was created from this TIN.
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Problem The City of Ithaca, Tompkins County, N.Y., is in the process of developing a flood management plan for the streams that flow through the City. Flooding in the City is an annual problem caused by a variety of distinct and sometimes interconnected reasons. Flooding often is a result of snowmelt and rain during the winter and spring. Slow ice-melt and breakup can lead to ice jams and subsequent flooding. Flash floods are produced by summer thunderstorms. All of these flood types are compounded by two factors: the storm-sewer system in the City and the elevation of Cayuga Lake. The storm sewers drain to the nearby streams at points below the tops of the streambanks. Because the streamward ends of the storm sewers...


    map background search result map search result map Water-Surface Profiles and Discharges for Four Stream Reaches, Ithaca,  Tompkins County N.Y. Flood-Inundation Maps for Four Stream Reaches, Ithaca, Tompkins County, New York Transect points collected during bathymetric survey of lower Sixmile Creek reservoir, Ithaca, NY, 2015 1938 Bathymetric contours of lower Sixmile Creek reservoir, Ithaca, NY Inundation boundaries for flood-inundation maps for Cayuga Inlet, Sixmile Creek, Cascadilla Creek, and Fall Creek at Ithaca, New York Transect points collected during bathymetric survey of lower Sixmile Creek reservoir, Ithaca, NY, 2015 1938 Bathymetric contours of lower Sixmile Creek reservoir, Ithaca, NY Water-Surface Profiles and Discharges for Four Stream Reaches, Ithaca,  Tompkins County N.Y. Flood-Inundation Maps for Four Stream Reaches, Ithaca, Tompkins County, New York Inundation boundaries for flood-inundation maps for Cayuga Inlet, Sixmile Creek, Cascadilla Creek, and Fall Creek at Ithaca, New York