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(4) Develop a database for compiled data and for new data gathered under this project, with access to <br />selected data through a GIS-based web page (Tasks 6 and 7), <br />(5) Conduct a quantitative descriptive analysis of new data gathered under this project (Task 8), and <br />(6) Prepare a synthesis and evaluation of existing and new data and recommendations for enhanced and <br />expanded data collection for system characterization and model support (Task 9). <br />Task 1: Data Needs Assessment and Compilation of Existing Data <br />A broad literature review will be conducted and dialogue will be held with up to a total of 15 to <br />20 individuals and up to about 8 to 121oca1, state, and federal agencies to identify data needed to <br />adequately describe and model the stream-aquifer system in the UARB and LARB. To gain <br />farniliarity with the general conditions in the field, to formulate the right questions regarding data <br />needs, and to identify the best persons and agencies for further dialogue, up to 4 reconnaissance <br />field trips will be made to representative regions of the UARB and LARB. Attention will be <br />given to descriptors of essential water-related properties of the basin and to the significant <br />components of the water balance. Special consideration will be placed in this study on water <br />quality characteristics, including concentrations and loads of important constituents in ground <br />water and surface water. Input will be sought regarding data requirements for the calibration, <br />testing, and support of existing models of the stream-aquifer system and of models planned for <br />future development [e.g., the proposed Arkansas River Decision Support System (DSS)]. A list <br />of priority data needs, along with a brief rationale, will be prepared as a product. <br />Available existing datasets will be compiled, their nature and extent will be briefly described in <br />written form, and quality will be evaluated. This evaluation will consist of a brief written <br />professional opinion (with references where possible) of the quality of the materials and methods <br />used for dataset collection and associated reliability of the data. Such data will likely include <br />flow rates at existing gauging stations; trans-basin diversions; precipitation and snowpack <br />records; pumping well records; water quality samples; topography and hydrography; reservoir <br />features, storages and releases; crop surveys and yields; natural vegetation inventories; geologic, <br />lithologic, and soils characteristics; climatic data; satellite imagery; and evapotranspiration <br />estimates. Documents, maps, and electronic data files, along with brief descriptions and <br />evaluations, will be prepared as a product. Available data that are deemed adequately reliable <br />will be converted into an appropriate format and incorporated into a database as described in <br />Task 6 below. <br />The type, location, and timing of data to be gathered in existing and new representative regions <br />under the proposed project will be planned and refined over the course of the project in light of <br />what is learned from existing data. Existing data will be supplemented, particularly within the <br />new study region in the UARB, to better characterize patterns of streamflow accumulation and <br />loss within the Arkansas River Basin system as outlined in Tasks 2 through 5. <br />2