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PROJECT APPROACH <br />Riverside will evaluate whether previous integration efforts, such as on the Instream Flow DSS <br />and CDSS, are still applicable or whether a new approach is required. Riverside envisions that <br />templates for graphical products can be developed using the TSTooI software, which is a CDSS <br />component used previously for integrating time series analysis and display with GIS. The <br />templates can be used in the operational system for standard graphical data products. Riverside <br />will: <br />• Determine an overall design that will produce required data products. <br />• Determine whether analysis that is more complex is needed (e.g., performing simple routing <br />and flow accumulation to estimate flows at critical ungaged locations). <br />• Determine whether additional external data are needed to make operational decisions (e.g., <br />flow, climate, and snow data that are not currently tracked by the SMS, or new products such <br />as those generated from SNODAS). <br />System development will occur over several iterations as described in Section 4.3.1. In the past, <br />Riverside has utilized the real-time data provided on the State's ftp site to populate data in <br />HydroBase running at Riverside. This approach can also be used for the Flood DSS. A <br />component will be implemented to access or compute historical streamflow statistics and real- <br />time streamflow to annotate a stream gage layer with current (or last reported) streamflow value, <br />corresponding date and time, and percentile of historical values. A similar feature that was <br />implemented in the prototype will need to be updated to function in a dynamic web environment <br />where streamflow data are updated on a regular basis. One challenge is the handling of: <br />snapshots of the map layer attributes that will change over time. Figure 4-8 illustrates a map <br />layer with color-coded circles indicating streamflow conditions.. This layer is similar to the view <br />available on the USGS website; however, it contains all of the data being maintained by the <br />State, which may contain points that are not available on the USGS site. The procedure to <br />produce the statistics can be the same as or similar to the USGS procedures. <br />DNR RFP PDA-923 45 R ~ V E R S I ~ E <br />