Scope and Limitations of Urban Water Information System (UWIS)

Scope:

Urban Water Body Information System may be used by urban local bodies (ULBs) of the concerned departments to shortlist water bodies for rejuvenation under the AMRUT 2.0 program.
This portal provides information extracted through remote sensing satellite data on temporal Water Spread Area (WSA) and water quality parameters for all water bodies within town boundaries for 500 AMRUT cities.
This portal also provides a platform to incorporate field information, such as ownership, utility/usage, etc., enabling a single point source for urban water bodies information.
Land Use / Land Cover (LULC) information within a 100m buffer around shortlisted water bodies is provided for two time periods with a gap of around 10 years.
This LULC information is a valuable input for ULBs, useful for calculating LULC change analysis around water bodies to inform rejuvenation measures.

Satellite-derived information is subject to the availability of cloud-free optical satellite data.
The scale of mapping is 1:10,000.
Mapping classes are limited to urban areas only.
Water body boundaries are based on one of the following:
- Full Tank Levels (FTLs)
- Maximum water spread area during the study period
GT corrected LULC outputs from National projects like AMRUT and SISDP will be utilized.

Groundwater Prospect- Health & Sustainability are key input for aquifer mapping, resource estimation, and future groundwater development planning to provide groundwater based supply in urban agglomeration.
Assessing the aquifer capability to provide safe groundwater based supply in case surface water based schemes are un-available.
Maps are based on the availability of recharge conditions (e.g., rainfall, depth to water table, water in water bodies during the mapping period). Depth and yield may vary.
Aquifer sustainability layer help identify groundwater over-exploitation zones and groundwater conservation zones (wetlands, water bodies), aiding in planning, restricting further urban development, restoration of urban water bodies for suitable recharge structures to improve groundwater development conditions.
Groundwater Quality (GWQ) point observations represent the ‘Pre and Post Monsoon’ water quality of the habitation.

Groundwater being a hidden resource, it is difficult to dig out information without proper understanding. In urban built-up areas, the task is further challenging as the lithology, geomorphology, lineaments are often reclaimed or masked due to urban development. To overcome the limitation, thematic layers derived from Very High Resolution (VHR) satellite data and systematic gridded (1 Km X 1 Km) field observations collected and integrated to understand and interpret the urban aquifers.
The scale of mapping is 1:10,000.The spatial accuracy of the derived or interpreted layers are as per the accuracy limit of the input satellite images and DEM.
The water level observations are collected from both observational and exploitation wells, with varied abstractions conditions. Thus the derived aquifer health is dynamic and may vary in space and time.
Artificial recharge zonation is provided in aquifer sustainability layer, demonstrating, possible artificial recharge measures/ structures. Due to the rapid dynamic nature of the urban areas, the actual indicative structure needs to be techno-economically analyzed before construction. Thus, zonation and possible indicative recharge structures are provided to eliminate these dynamic and urban complexities.