Specifications include, but are not limited to:The Texas Water Development Board (TWDB) requests responses to this Request for Qualifications (RFQ) to award a Services Contract(s)to one or more Contractors to conduct model calibration for at least 23 National Weather Service West Gulf River Forecast Center locations in Texas. The goal of the Project described herein is to produce well-calibrated models for at least 23 watershed locations in Texas identified as sites to be included in this project in Table A.1. However, one or more of these locations may be replaced as needed (based on data limitations or other conditions) with others listed as additional sites in Table A.1. following discussion with the National WeatherService and the TWDB. Implementation of these models will enable the West Gulf River Forecast Center to (a) improve forecast accuracy, (b) produce short- and long-range ensemble hydrologic forecasts based on natural flow conditions, and (c) expand the number of locations where forecasts can be generated. All models must be calibrated to one-hour time steps for all sites. Wherever possible, calibration work will leverage internal gages operated by the Harris County Flood Control District. Use of data from these gages may require rating development and/or review. Existing hydraulic modeling may be helpful for rating curve development where measured data is not available. For the Addicks and Barker basin inflows (ADDT2 and BAKT2 in Table A.1), some consideration will need to be made for inter-basin transfer that occurs between Cypress Creek and basins that contribute to Addicks and Barker reservoirs. See details prepared by the Harris County Flood Control District (https://www.hcfcd.org/projectsstudies/cypress-creek/cypress-creek-overflow-management-plan/). Final results must be delivered as a study report and calibrated Community Hydrologic Prediction System models in stand-alone configuration capable of running a single warmstate simulation (T0-5 days to T0) of the entire calibrated basin from headwaters to the most downstream point. The stand-alone configuration workflows must be consistent with the typical West Gulf River Forecast Center workflow templates, where upstream flows are routed downstream, local flows are computed and combined, flows are adjusted to observed flows, and stages are computed (see Appendix A, Attachment 2 as a template/example).