These models would be used to simulate high flows and to generate water-surface profiles from which flood-inundation maps could be created.
An update on Cayuga Inlet dredging plans, Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on Reddit (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Pinterest (Opens in new window), Click to share on Pocket (Opens in new window), Click to share on Telegram (Opens in new window), Click to share on WhatsApp (Opens in new window), Click to share on Skype (Opens in new window), 2015 report by the engineering firm O’Brien and Gere, a draft Environmental Impact Statement in 2011, Advertising and Sponsorship Opportunities.
Under extreme conditions, flooding can result from high lake levels alone by water moving through the storm-sewer system and filling low spots in parking lots and road ways. There was an error processing your request. The Ithaca Voice is an online-only nonprofit news site serving Ithaca and Tompkins County. Sorry, there are no recent results for popular videos. Winds light and variable. That same year, a presentation by Lisa Nicholas, senior planner in the city’s Planning, Building, Zoning and Economic Development Department, called for the facility to be ready by fall 2013. This approach will result in 15 sets of water-surface profiles: 5 flows simulated at three different lake levels. 12.The final HEC-RAS hydraulic model, flood-inundation polygon shapefiles, depth grids, and associated metadata will be provided to the City of Ithaca.
This is a space for civil feedback and conversation. The USACE conducted a hydraulic analysis of the decreased conveyance in Cayuga Inlet that has resulted from long-term sedimentation (shoaling) of the flood-control channel (USACE, 2011). Please help support local journalism by whitelisting this site in your ad blocker. Since then, the channel’s capacity has been reduced by sediment build-up. The existing USGS streamgage 04233255 on Cayuga Inlet will serve the same function as these staff gages. Devon Magliozzi is a reporter for the Ithaca Voice. Digital flood-inundation maps for a 2.9-square-mile area of Ithaca, New York, were created in 2015–18 by the U.S. Geological Survey in cooperation with the City of Ithaca, New York, and the New York State Department of State. The City of Ithaca, in partnership with an environmental consulting firm and an engineering firm, produced a draft Environmental Impact Statement in 2011 that detailed plans to build a dewatering facility on land owned by the city behind Walmart and Lowe's. The flood maps would also be referenced to staff gages that will be installed at a selected point within each of the Fall, Cascadilla, and Sixmile Creeks study reaches and to a USGS streamgage on Cayuga Inlet. Flood maps are also available from a recent study conducted by the U.S. Army Corps of Engineers (USACE, 2011); however these maps reflect flooding only for the 100-year flood and one initial lake elevation, and only along Cayuga Inlet and the mouths of the tributaries.
Ithaca, NY (14850) Today. Geographic Names Information System (GNIS), Mapping, Remote Sensing, and Geospatial Data, Geospatial dataset of flood-inundation maps for Cayuga Inlet, Sixmile Creek, Cascadilla Creek, and Fall Creek at Ithaca, New York. Ithaca, N.Y. – In 1935 Ithaca suffered its flood-of-record, with a series of thunderstorms leaving hundreds killed or displaced across the Southern Tier. Slow ice-melt and breakup can lead to ice jams and subsequent flooding. Error! The HEC-RAS models will simulate water-surface profiles for a given recurrence-interval flood for each of these lake elevations. These documents will include the FEMA flood-insurance studies (FISs) for the four study reaches (FEMA 1981; 1984) and the USACE study of Cayuga Inlet (USACE, 2011). High 61F.
guidelines: 1. be kind and courteous. The hydraulic models will be used to compute water-surface profiles through the study reaches (as defined in the Scope section) for flows with recurrence intervals of 2-, 10-, 50-, 100-, and 500-years (annual exceedance probabilities of 50, 10, 2, 1, and 0.2 percent).
Click on a pin on the map to see more information. Clear skies. The objective of this project is to develop hydraulic models and generate a series of flood-inundation maps that will reflect flows with 2-, 10-, 50-, 100-, and 500-year recurrence intervals for selected reaches of Fall, Cascadilla, and Sixmile Creeks and Cayuga Inlet within the City limits of Ithaca. A Digital Elevation Model (DEM) of the study area that was derived from lidar data collected during 2008 will be obtained from the City of Ithaca. 11.The 15 flood maps will be available in electronic format as individual products of this project; that is, as shapefiles and depth grids. The bathymetric data will be incorporated into the cross sections used in the HEC-RAS models. The last time the inlet saw a large scale dredging was in 1982, when the New York State Department of Transportation removed 202,000 cubic yards of sediment to make way for boats in the inlet, according to a 2015 report by the engineering firm O’Brien and Gere prepared for the Dormitory Authority of the State of New York. The New York State Department of Environmental Conservation is responsible for periodically dredging the Cayuga Inlet to maintain its flood control capacity. One deficiency in the existing USACE HEC-RAS models is the lack of current bathymetric data for Cayuga Inlet and the mouths of Fall, Cascadilla, and Sixmile Creeks, which are subject to shoaling in the reaches that are affected by backwater from Cauyga Inlet and Cayuga Lake. Water-surface profiles will be transferred to a GIS (HEC-GeoRAS; USACE, 2009) and, following the guidelines for interagency coordination regarding the production of flood-inundation map libraries documented by the NOAA (2011) and the IWRSS Consortium (2013), the DEM data will be used to -- create a water-surface Triangular Irregular Network (TIN) from the water-surface-elevation data for each simulated flood magnitude / lake elevation, and -- create a flood-inundation polygon and a flood-depth grid for each flood magnitude / lake elevation. Photos of the flooding in the village submitted by Bruce Drowne.
10.The polygon shapefiles and depth grids generated by each of the two models will be merged such that the final flood maps will display the entire study area. The channel was built by the U.S. Army Corps of Engineers from 1965 to 1970 to provide an outlet for water when Six Mile Creek and Cascadilla Creek gush. Weather: Much cooler with potential flakes late week https://t.co/KpEGMKlXA6, Is Ithaca vulnerable to a flood? The flood-inundation maps depict estimates of the maximum areal extent and depth of flooding corresponding to selected flood frequencies for Cayuga Inlet. Flooding often is a result of snowmelt and rain during the winter and spring. High lake levels can cause backwater in the downstream reaches of the streams that flow through the City, which, in turn, can slow flows and increase water levels above that which would otherwise occur. Oktoberfest Pushes On Through The Pandemic ITHACA,N.Y(WENY)-- Liquid State Brewing Company in Ithaca held its annual Oktoberfest yesterday, but with a few modifications.
Rain likely. Sunny.
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