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design with existing data. Stored procedures will be made available to RTi to access the <br />HydroBase data. <br />106.2 Corrections to HydroBase Water Source Data. The updated HydroBase from Task <br />106.1, in conjunction with available NHD data, will be used to evaluate the quality of and <br />correct the HydroBase data. It is expected that the NHD linework will not exactly match the <br />physical streams referenced as HydroBase water sources. Therefore, the original NHD layer <br />may need to be processed in some (ideally automated way) to produce a layer consistent with <br />HydroBase and its water sources. RTi staff will utilize the existing HydroBase data and <br />NHD linework to suggest corrections to the existing water source data, in particular the "trib <br />to" connectivity for streams, and will provide data to link the water source records in <br />HydroBase to NHD data. Because water source data are used throughout the state, all <br />HydroBase water source data will be reviewed and corrected. However, links to NHD data <br />will only be made for the SPDSS study area, for which data will be available from SPDSS. <br />HydroBase data changes will be made by the State's HydroBase DBA. The resulting <br />HydroBase will be provided to RTi in order to complete the remaining subtasks. This task <br />will focus on surface streamflow water sources. Springs and other water sources will not be <br />reviewed, other than to correct cases where water sources are misrepresented as streams. <br />Data other than streamflow may be reviewed in a future task as data quality issues and <br />linkages to spatial data are determined. <br />106.3 Update WIS Software. Update the CWRAT WIS software features to use the updated <br />stream connectivity data in HydroBase. The current CWRAT WIS tools use a HydroBase <br />"stream" table that will be eliminated when the water source information is updated. Update <br />CWRAT to use the new water source data. <br />106.4 Update CWRAT WIS Data. The availability of updated water source data will allow <br />existing WIS data to be updated by replacing old water source identifiers with updated <br />values. This effort will be accomplished by coordinating the State HydroBase DBA's efforts <br />with review of WIS by RTi. Because these data are used throughout the state, all WIS for the <br />state will be updated. <br />106.5 Documentation. Update the StateView/CWRAT documentation to reflect the WIS <br />enhancements and include in a standard software update. <br />Deliverables: <br />106.1 A design memorandum will be prepared describing changes to the HydroBase design <br />necessary to correct existing design problems related to the water source data, and to allow <br />linkage with the NHD data for the stream network. RTi will prepare the memorandum in <br />conjunction with the State's HydroBase DBA. The design will be implemented in <br />HydroBase utilizing existing data. Stored procedures to access the data will be written by the <br />State's HydroBase DBA. <br />106.2 Corrections to the HydroBase water source data and linkages to the NHD data will be <br />determined by RTi and provided to the State's DBA to load into HydroBase. Corrections <br />will be for the entire state but NHD linkages will only be determined for the SPDSS study <br />area using the NHD data from the GIS contractor. The State's HydroBase DBA will update <br />HydroBase and will provide the contractor with an updated database for further development. <br />