The surface-water resources of a nation are the water in the rivers, streams, creeks, lakes, wetlands and reservoirs which is vitally important to our everyday life. It is an important source of drinking water and is used for the irrigation, industrial and as well as other public uses. The availability of surface water varies depending upon the precipitation, storage capacity (lakes, wetlands and artificial reservoirs), permeability of the soil, runoff characteristics of the land, timing of precipitation and the local evaporation rates etc.
Information of surface water and availability in a single platform is a prerequisite for resources planning. India-WRIS web portal collects data regarding surface water from varied sources, stores and manages the data and also make it available to download in a report format for easy access to users. This information is also used for derived information in Water Audit module.
The modules containing surface water data are:
- Reservoir level: The information of live daily data on reservoir level and storage capacity of monitoring reservoirs is available.
- Minor irrigation tanks: The information of live daily data on the total capacity and total storage of minor irrigation tanks is available. The data is APWRIMS and currently only available for AP state.
- Reservoir Sediment Study: It offers the result of sediment study done using remote sensing method and hydrographic survey in different reservoirs spread across India.
- Surface Water Bodies: It offers the visualization of mapped water bodies across nation and State-District and Basin-Subbasin wise number of waterbodies under different area classes.
- Rivers points (hydro-observation stations) data: The live daily data of river water level and river flow time series data is available.
- Snow Glacial Lakes: It contains information of glacial lakes and water bodies of Himalayan regions for the years 2011 to 2019 covering the major river basins namely, Indus, Ganga and Brahmaputra. The glacial lakes/water bodies have been mapped based on the visual interpretation of AWiFS satellite images.
- Wetlands: It provides the spatial extent of wetland and its sub categories for pre-monsoon and post-monsoon comparisons of two years i.e. 1994 and 2005.
- Surface water quality: The data on 66 parameter measured for water quality is available on a monthly level from aug-1963 to march,2020.