Introduction
The World Bank has assigned Deltares and its partners AECOM India and FutureWater to carry out the project ”Analytical Work and Technical Assistance to support Strategic Basin Planning for Ganga River Basin in India”.
The Ganges is the most populated river basin in the world and is home to half the population of India including two-thirds of the nation’s poor people. The basin provides over one-third of the available surface water in India and is the focus of over half the national water use – 90 percent of this being in irrigation.
The ecological health of the Ganga River and some if its tributaries has deteriorated significantly as a result of high pollution loads (from point and non-point sources), high levels of water abstraction for consumptive use (mostly for irrigation but also for municipal and industrial uses), and other flow regime and river modifications caused by water resources infrastructure (dams and barrages for diverting and regulating the river and generating hydropower).
Setup
The viewer is the platform for dissemination of data inserted in a database and or in other manners made available to the project. The picture below shows a schematized setup of the data management system which is currently hosted at Deltares
The left side of the schema shows the overall architecture of the Ganga WIS. Via OGC web services data from the database are disseminated to the Information layer (displayed as Ganga Dashboard). Data will partially be imported using a stand alone version of FEWS. FEWS enables easy loading and validation of time series data which can be imported via automated procedures. Other types of data will be loaded manually since they are highly heterogeneous.
On the right side (the blue part) the project website is mentioned. This site has to be developed.
The dashboard will have strong link with the data stored in database and THREDDS server.
The viewer
The Viewer is for now a means of dissemination of results and data.The viewer can be reached by its technical name (http://1220123.openearth.eu). Credentials are necessary and provided to you by email.
The viewer consists of various parts. Below a screen dump of the viewer.
On the right hand site the so called canvas, in this case populated by background maps of OpenStreetMap. In the canvas on the upper left three zoom levels are defined:
- Extent Ganga
- Regional extent
- National Extent
On the upper right site + and - buttons are available for zoom in and zoom out actions. This can also be done by respectively scroll wheel forward and backward.
On the left hand side the so called table of contents with the logo's of the contributing parties. Directly below that three items are available, which are presented as tabs, these are:
- time series (gets available time series data)
- misc data (displays available static layers)
Time Series
The Time series tab fires a process (a Web Processing Service) which harvests a list of parameters form the database. The result is a list of available parameters in the database, like the following picture.
These time series data are inserted via FEWS and stored is a specific part of the database.
As soon as a user has given some dates of interest in the time period section of the table of contents of the time series tab the corresponding data (locations) are harvested from the database and visualized by the viewer. A user can then click a location and a third WPS is fired that get's the time series. This is presented as a time series plot over the viewer. For instance for the daily automatically harvested precipitation of rainfall data.
Future plans
For now this is the first version available. For 2016 it is planned to enter more information that is used by modellers. For time series data this should be directly visible in the graphs, more time series data will be made available through data ingestion via FEWS.
WPS Hymos functionality will be added from end of this year.
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