To accomplish the task of developing robust, useful simulations of hydrology across a broad range of landscape and climatic characteristics in the Red River basin, a multi-model approach will be used to address the goals of the National Water Census. A monthly water balance model, as well as a statistical daily streamflow model will be used to constrain the calibration of a daily time step Precipitation Runoff Modeling System (PRMS) hydrologic model for all watersheds in the Red River basin. The data products from these models will include flow characteristics – magnitude, timing, duration, rate of change, and frequency – for a range of configurations (current and future climate and landscape) which can be used to inform management decisions.
The Precipitation Runoff Modeling System (PRMS) team will construct a daily time-step PRMS model (Markstrom and others, 2008, 2015) of streamflow for all of the Red River Basin, which would augment an ongoing project Hydrologic Response Units (HRUs) and hydrologic simulations with the Gulf Coastal Plains and Ozarks (GCPO) Lower Conservation Cooperative (LCC) for reaches downstream of Lake Texoma. Therefore, about half of the model that would be needed for this project (lower half) has been built through the GCPO LCC initiative and a framework and starting parameter set have been developed for the upper half of the modeled area (above Lake Texoma).
The objectives of this initiative are as follows:
The rainfall-runoff model and results that are compiled during the study will archived according to USGS policy. A USGS Scientific Investigations Report (SIR) that documents the PRMS model and the simulation of current and projected water budgets in the Red River basin will be published.