of NCA for Hydrological Forecasting in Narmada
Availability of reliable data such as water levels and rainfall coupled with inflow forecasts for existing/on-going projects in the basin is essential for taking right decisions on water management, for optimum utilization of water resources. It was in this context that Narmada Water Disputes Tribunal (NWDT) directed that, "---- stream and other gauging stations equipped with automatic recorders, wherever necessary, discharge, silt, and evaporation observation stations and measuring devices be installed, maintained and operated in the Narmada basin". The present conventional method of manual data observations and transmission results in a considerable time lag between data observation in field and its receipt at decision-making level which sometimes leaves very little time for issue of flood forecast and
taking remedial measures for the dam safety and also evacuation of population in the downstream flood zone. The planned computerized network operating in real time environment and free from such snags will improve efficacy, accuracy and also warning time round the year for efficient integrated reservoir operation, dam safety and the flood management. To comply with the directives of NWDT, Narmada Control Authority has set up a high-tech Real Time Data Acquisition System in Narmada basin, which is in monsoon, 2007.
Real Time Data Acquisition System in Narmada Basin
international / state boundaries and coastline, authoritative survey
of India maps may be referred to:)
Hydromet Network in Narmada Basin (Click here to
view enlarged image)
Real-Time Data Acquisition System [RTDAS] comprising of 96 remote stations and a Master Control Centre for the acquisition of real-time hydro-meteorological data has been planned to be implemented in two phases for the purpose of study, formulation and monitoring of reservoir regulation and also regulation of water releases from
Tawa, Bargi & Indira Sagar Projects in Madhya Pradesh and Sardar Sarovar
Project in Gujarat and also regulated releasesof water to SSP ex-Maheshwar
project as per directives of NWDT. The initial phase of implementation comprises of 26 representative remote stationsspread in the Narmada basin and a Master Control Centre (MCC) at Indore in Madhya Pradesh. The initial phase of RTDAS network
is being facilitating :
- Automated real-time data communication through Data Relay Transponder (DRT) on board KALPANA-I under interrogation-answer back protocol’ at a pre-programmed interval of 15 minutes.
- Transfer of e-mail among projects and key stations within the network.
- Flood forecast / lean flow assessment for four projects.
- Water level forecast at two locations in Madhya Pradesh.
- Integrated reservoir operation.
- Water accounting and budgeting
- Creation & maintenance of user-friendly hydro-meteorological database for the basin.
Master Control Centre
Master control centre at Indore uses a 3.6 metre dish antenna with INSAT earth station system and GPS time code receiver for communication control of data and e-mail transfer as well as time synchronization of the network (block diagram of MCC is given at Plate-III). The data collected at remote stations is transmitted on real-time mode over WAN to a Pentium server and associated work stations installed in MCC. Appropriate application software viz. Datawise and HEC-DSS for validation & analysis of hydromet data, maintaining the archive, Water Management Software viz Sacramento Soil Moisture Account (SSMA), Channel Routing Model & HEC5 shall be used to fulfill different objectives.