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Introduction Decision Support
System (DSS)


Information System

The applications developed for the Information System allow the visualization of geo-referenced information, being this information stored on a server database. You can access not only to the detailed views of the river network, but also the management system for monitoring data (meteorological, hydrometric and water quality). The easy access to the georeferenced information is always crucial in any tool of a System Modeling.

Web applications developed for the Information System:


In a geographic information system for each theme is assigned a set of alphanumeric data, stored on a database, information that allows the user get detailed understanding of the selected structure. On the platform presented here, the georeferenced information is organized in a Geographic Information System using an auxiliary tool - the software Arcview. The map service is available through the Web with the help of GeoClient software, to which have been added some extra features.

Figure 1

Figure 1 - Main structure of the application that offers the Web-SIG service.

The composition of the map to be displayed to the user is defined from a form with the available themes on the database, built automatically at the query time (Figure 1). It's also possible to use some predefined maps set by the administrator of the database. The final map presented in the Geoclient interface (Figure 2) is the result from the choices made in the form mentioned above.

Figure 2

Figure 2 - General appearance of the GeoClient interface.

At the top of the window you will find a toolbar that allow you to show more or less details, identify visible structures on the map, place labels on graphical entities, export themes to GoogleEarth, among other features.

On the right side of the window you will find the mini-map (useful for locate the visible area of the map) and the legend which lists the themes that are part of the map. The list of themes allows the user to define which themes should be visible, besides allowing other types of configurations, such as the color to be used for each theme or if you prefer, set classes of value.

These interactive maps allow you to explore information concerning various subjects, visually exploring the territory and doing queries to certain information, presenting these results on a table or graph format (Figure 3).

Figure 3

Figure 3 - A query on the GeoClient interface (Web-SIG application).

Thus, among the main features of this interface we highlight the following:

  • Presentation of themes of different types (point, line or polygon);
  • Possibility of navigation on the map (change scale and translations);
  • Query information associated with graphical entities;
  • Manual or automatic placement of labels on graphical entities;
  • Presentation of a configurable legend;
  • View information organized by classes;
  • Query results on graphical or tabular format;
  • Possibility to export themes to GoogleEarth (KML extension);
  • Includes a location map (mini-map);
  • Multiple options viewing.


The viewing of georeferenced information can also be done through the interface of presentation of detailed information about water lines. This interface allows the identification over orthophotomaps and administrative boundaries, the axis of the water lines with their banks, as well as the location of relevant infrastructure: water abstractions, wastewater discharges, dams, weirs, riverside buildings, industrial buildings and monitoring stations . For each of the structures it is possible to consult associated information, existent on the Database.

So not only it's possible make a virtual tour to the water lines, but also locate relevant infrastructures for the knowledge of hydraulic operation and water quality of the rivers. The navigation on the river network is driven by the water lines. From an initial map you select the water line you want to access and subsequently it becomes available to the client several navigation tools and an interactive legend that allows you to enable / disable the themes (Figure 4). It also allows you to see all the alphanumeric information associated with each of the available entities and visualize photos, when they are available. Such as the application developed for Web-GIS, in this case, all the operations of information management should be performed on the database.

Figure 4

Figure 4 - Appearance of the web interface that makes possible to see detailed information about the water lines.

On the right side of the window you will find the mini-map and the legend. The mini-map serves to locate the area displayed on the map, while the legend allows you to enable / disable the display of the various themes. On the right side are also located the buttons that let you change the viewing scale. On the left side is presented the main map where the user can navigate and select the structures / objects on which he wants to get information.

Structures / objects represented in the interface:

  • Weirs;
  • Bridges;
  • Wastewater Treatment Plants (WWTP);
  • Water Treatment Plants (WTP);
  • Monitoring stations;
  • Hydropower generation;
  • Water abstractions;
  • Industrial buildings;
  • Other structures;
  • River axis;
  • Left bank;
  • Right bank;
  • Administrative boundaries;
  • Orthophotomaps.

Most of the objects represented on the main map has associated information. To access this information simply click with the left mouse button over the respective icon that appears along the water line on the map (Figure 5).

Figure 5

Figure 5 - Section of the water line that contains hydraulic structures with associated information.

Figure 6

Figure 6 - View detailed information relating to a hydraulic structure.

In the information window, for each structure it's possible to know for example, its dimensions, its location and purpose as well as the level of interference and state of preservation (Figure 6) or even to see photos (Figure 7).

Figure 7

Figure 7 - Three photos of a hydraulic structure.


The infrastructures interface relating to the geometry of the cross sections provides a set of information associated to the shape, size and position of all cross sections of the adductors which integrates the infrastructures of a specific water system. The interface provides a listbox where you can select the desired cross section and kilometer. While the frame on the right side shows the location in the plan view, the frame on the left shows the geometry of the cross section and some information about it (Figure 8).

Figure 8

Figure 8 - Mains view of the Geometry of Hydraulic Infrastructures's interface.

For example, in the presence of a trapezoidal section, it's possible to know (if this information is registered on the database), the height and the width, the dimension of its base and the embankment slope (Figure 9).

Figure 9

Figure 9 - Geometry of a trapezoidal section.


The data from hydrometric and monitoring stations of water quality constitute crucial information required to the evaluation of the water quality status and to the definition of modeling scenarios, useful to predict the evolution of the water quality on differents water resources. In the presence of such data, it becomes important to have applications that allows you to analyze and process these kind of data. It's in this context that we present this interface (Figure 10).

Figure 10

Figure 10 - Application framework responsible for providing the monitoring data in a web environment.

The service provided by this tool includes among others, the following features:

  • station selection through a map or a list of stations;
  • graphic visualization of the data series for the selected parameter into a particular station;
  • table visualization of the data series and the possibility to export to MS Excel;
  • statistical analysis of the active data series.

Figure 11

Figure 11 - Web service description - Data monitoring.

The interface also makes available a useful feature that allows you to generate a short report with information about the represented data. This report can be considered a compilation of all the information that is available in the interface, containing not only information about the station, but also the data series in chart and table (Figure 12).

Figure 12

Figure 12 - Partial content of the report automatically generated by the application.

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