NATIONAL HYDROLOGY PROJECT CENTRAL WATER COMMISSION River Basin

NATIONAL HYDROLOGY PROJECT CENTRAL WATER COMMISSION

River Basin Planning

Basin for Study Central water Commission has divided the country into 20 rivers basins comprising 12 major and 8 composite river basins

PROPOSED BASIN STUDY River Basin Catchment Packag area (Sq. Km) e Indus Brahmaputra-Meghna (a) Brahmaputra (b) Barak & others Minor Rivers draining into Myanmar (Burma) and Bangladesh 321289 Godavari Krishna Subernarekha Mahanadi 312812 258948 29196 141589 I II 194413 41723 36302 III IV V

PROPOSED BASIN STUDY River Basin Catchment Package area (Sq. Km) Cauvery 81155 VI Pennar 55213 Mahi 34842 VII Sabarmati 21674 Narmada 98796 Tapi 65145 West Flowing Rivers from Tapi to Tadri 55940 VIII West Flowing Rivers from Tadri to Kanyakumari 56177 East Flowing Rivers between Mahanadi and 86643 Pennar East Flowing Rivers between 100139 Pennar&Kanyakumari West Flowing Rivers of Kutch and Saurashtra 321851 including Luni

Period/phases of the Consultancy Phase I- Development of the comprehensive model/ suite of models. -2 year Phase II-Maintenance, updating and Running of the models in real time during warranty period. -2 year

Scope of Consultancy Phase-1 (Development Phase- 2 years) � Understand the catchment yield and how this varies in time and space, particularly in response to climate variability: seasonally, inter-annually, and inter-decadally. � Estimate the relative contributions of individual catchments to water availability over a much larger region, e. g. valley or basins scale. � Estimate how this catchment yield and water availability might change overtime in response to changes in the catchment, such as increasing development of farm dams, or changes inland-use and land management. � Development of the comprehensive model/ suite of models for, creation of basin wise plan, including integration of models with input data, creation of dissemination web based GIS portal and dissemination of model output in defined platform. � Scenario analysis with climate change impacts for present as well as future � Development of Dashboard for IWRM plan and its linkage with existing portals like WRIS, NWIC etc.

Scope of Consultancy Phase-2 (Warranty period- 2 years) 1. Updating models and data as and when required. 2. Addressing problems faced by stakeholders. 3. Debugging of models and dashboards 4. Ensure dissemination of outputs/results to all stakeholders and updation of dashboards if needed. 5. Ensure linkages with existing portals such as WRIS, NWIC etc and with the micro models developed by states in that basin.

Objectives �To prepare a long-term Integrated Water Resource Management (IWRM) plan for the river basins, taking into account the State's socioeconomic development plan; �To develop both demand management and supply management options, and encourage water-use efficiency through nonregulatory and regulatory mechanisms, particularly to increase efficiency in irrigated and dry land area and engaging the community in the management of the basin's resources, elaborate, monitor and review the River Basin Management Plan so as to; �Develop, and update a Water Master Plan through public information and participation; �Strategic planning in setting long-term goals for water management in the basins covering issues, priorities, management actions, costs and benefits, and risk assessment.

Objectives �Identification of existing and Potential problems in the basins. �Facilitation for the formulation of planning and management strategies using the information generated by the Models. �Multi-scale environment flow assessment �Formulating framework for climate change impact assessment on water resources and adaptation option studies in future �Scenario generation �Generating problem specific scenarios �Capacity building of state government and CWC officials Learning on the job while working with models of their own basin as well as bottom up approach to planning and management in the real sense �To establish multi stakeholder engagement processes for strategic basin planning

Benefits/Outcomes � Scenarios based on varying efficiencies across sectors, including agriculture water use and industrial water use. � Assessment of point and non-point source pollution. � Assessment of the Impacts Of climate change on hydrologic extremes of floods and droughts in terms of likely changes in frequencies and magnitudes � Assessment of System performance in terms of implications on multireservoir systems operation including implications on water sharing among states � Options for inter-sectoral water allocations, long term and over-year reservoir operating policies, enhancing water use efficiencies, possible decreases in water demands by adjustments of cropping patterns, conjunctive use of surface and ground waters, enhancing recharge to ground water through artificial recharge, modifications in design requirements of hydraulic structures, change in irrigation practices, Ecological Management Practices (EMP) for sustainable development and any other innovative adaptive responses

How States will be involved in the study? ? ?

�Capacity building of state government and CWC officials through o Learning on the job while working with models of their own basin as well as bottom up approach for planning and management in the real sense. o Trainings/Workshops �To establish multi stakeholder engagement processes for strategic basin planning �Ensure linkages with existing portals such as WRIS, NWIC etc and with the micro models developed by states in that basin. �Addressing problems faced by stakeholders. �Sharing of Data on real time basis by both state and central Government

Data Requirement Irrigation and cropping areas: �All major and medium project and their area/ command areas(shape file) �Time series crops by seasons �Time series how much is irrigated with ground water and how much with surface water (by season by crop) �Periods of Kharif and Rabi (specific dates) �Sowing and harvesting dates of the crops for the different seasons (peak water usage).

Data Requirement �Specific of ground water �Yield-how many mega liters of water per meter of bore well depth? (with location and time period) �Number of ground water pumps in a district �Districts areas: �Project boundaries in shape file format for the basin/sub-basin Storages/ Barrages �Inflow and water levels – Daily �Elevation - Area Capacity tables [and year of the data] �Releases from the dam - from Power house, from Spillway, canals (left and right separately), gates– Daily �Releases for power (and power generated Kwh), industry, crops urban, etc. – Daily �Rating curves of canal - head regulators

Hydrodynamic models for Real Time Flood Forecasting coupled with weather forecast including Inundation modeling in Indian rivers

Basin for Study �Ganga upto downstream of confluence of Ghagra including all tributaries �Tapi and Mahi basin �Ganga from d/s confluence of Ghagra upto Farakka (including all tributaries) �Subarnarekha &Burhabalanga �Brahmaputra upto downstream of confluence of Subansiri including all tributaries �Mahanadi (including all tributaries) �Brahmaputra d/s of confluence of Subansiri including all tributaries �Godavari(including all tributaries)

Scope of the Consultancy Phase I- Development of the comprehensive model/ suite of models for, creation of online inundation map library, real time flood forecasting (level/ Inflow/inundation maps) including integration of models with input data, creation of dissemination web based GIS portal and dissemination of model output in defined platform. (15 months) Phase II- Maintenance, updating and Running of the model in real time during warranty period of 2 years. Phase. III- Providing comprehensive Annual Maintenance, updating and Running of the model in real time for period of 3 years after warranty.

Objectives of consultancy � To develop, calibrate and operate comprehensive model/ suite of models for real time flood forecasting. � To create Inundation map library for various return periods of rainfall events/ flood events including different scenarios of embankment breach at identified vulnerable location. � To integrate all processes for data management, forecast models and dissemination methodology etc. , in a single system in GIS environment to run models and generate forecast in fully automatic mode for short term period (3 days or more)with desired accuracy. � To develop web based Integrated Flood Warning System with customized GIS tool for real time dissemination of forecast, inundation maps library including development of dashboard for query based generation flood warning/flood inundation maps for all stakeholders. � Development of interface for real-time display of results of flood warning system on India-WRIS/ e-SWIS site for disseminating the forecast/inundation maps. � Training and Capacity building.

Model scenarios NWIC Modelling centre CWC Regional Modelling Centre Model scenarios advisory State Data Centre Modelling Unit Running additional scenarios, if required