RMSI: Development News

In India, flood is a major concern due to loss of life and infrastructure. The primary cause of flooding is excess of flood in river than its carrying capacity. Generally, in the hydrologic process of draining the rainfall from the catchment, sediments generated from eroded uplands & channel boundaries also get tagged in the natural channels. These sediments carried along get settled when the driving velocity of flow is unable to carry their weight, resulting in siltation and sedimentation. This deposition in the channel section directly affects the carrying capacity of the river systems which may be one of the causes for flooding. Integration of sediment generation, transportation and deposition would give a picture of sediment flow in rivers and would be useful in sediment management.

Objective: RMSI has been commissioned to study the issue of siltation and flooding in River Ganga and its major tributaries joining river Ganga from Buxar to Farakka due to Farakka Barrage in Bihar. This will also help in suggesting remedial measures for mitigation of devastation during floods.

Flood Plain Zoning in Meghalaya

Meghalaya is the wettest region of India recording an average of 3,000 mm of rainfall in a year. While the northern part of this plateau merges with the plains of Assam, the southern portion drops down abruptly to meet the plains of Bangladesh.

This physical feature of the State combined with heavy rainfall and subsequently high runoff rate, makes the regions of the State bordering the plains of Assam in the north and Bangladesh in the south prone to flooding during the peak monsoon months.

The hilly areas of the State, on the other hand, are affected by flash flooding, particularly at bends or meanders when the flow exceeds the carrying capacity of the river channel. The areas in urban parts of the State like Shillong, Williamnagar, Tura, Nongstoin, Baghmara, etc. are also subjected to flooding due to reduction in the carrying capacity of river or stream channels.

Objective: To reduce the flooding impact in an efficient manner, flood plain zoning of Wahumkhrah, Umtrew, Nonbah and Myntdu rivers was initiated along with preparation of feasibility study report for flood mitigation in the areas with human settlements.

Recent Wins

Study on Issue of Flood and Siltation in River Ganga and its Tributaries due to Farakka Barrage, Bihar

Flood Plain Zoning in Meghalaya

In Focus

Building Climate Resilient Livelihood in Gambia Using Geospatial Technology

Current Development Projects

Study on Risk Management & Resilient Infrastructure Development of Inland Water Transport (IWT), Assam

Hazard Mitigation & Resilience Plan, U.S. Virgin Islands

Events

Expert in Focus


<< back Recent Wins Study on Issue of Flood and Siltation in River Ganga and its Tributaries due to Farakka Barrage, Bihar Client: Central Water Commission In India, flood is a major concern due to loss of life and infrastructure. The primary cause of flooding is excess of flood in river than its carrying capacity. Generally, in the hydrologic process of draining the rainfall from the catchment, sediments generated from eroded uplands & channel boundaries also get tagged in the natural channels. These sediments carried along get settled when the driving velocity of flow is unable to carry their weight, resulting in siltation and sedimentation. This deposition in the channel section directly affects the carrying capacity of the river systems which may be one of the causes for flooding. Integration of sediment generation, transportation and deposition would give a picture of sediment flow in rivers and would be useful in sediment management. Objective: RMSI has been commissioned to study the issue of siltation and flooding in River Ganga and its major tributaries joining river Ganga from Buxar to Farakka due to Farakka Barrage in Bihar. This will also help in suggesting remedial measures for mitigation of devastation during floods. Solution: Identify possible models, suitable methodology for model development, data inputs for the model, expected output, methodology for calibration and validation of model. The modelling should consider the scenarios of pre and post Farakka Barrage. Carry out backwater study of Farakka Barrage to establish its impact on river in the scenario of different return period of flood Identify impact of Farakka Barrage with reference to operating policy on flooding and siltation in river Ganga and its aforesaid tributaries in Bihar Assess silt load and sedimentation with respect to different return period of floods and to identify the adverse effects emerging from flood peak on account of sedimentation in the river Ganga. Flood Plain Zoning in Meghalaya Client: Water Resources Department, Government of Meghalaya Meghalaya is the wettest region of India recording an average of 3,000 mm of rainfall in a year. While the northern part of this plateau merges with the plains of Assam, the southern portion drops down abruptly to meet the plains of Bangladesh. This physical feature of the State combined with heavy rainfall and subsequently high runoff rate, makes the regions of the State bordering the plains of Assam in the north and Bangladesh in the south prone to flooding during the peak monsoon months. The hilly areas of the State, on the other hand, are affected by flash flooding, particularly at bends or meanders when the flow exceeds the carrying capacity of the river channel. The areas in urban parts of the State like Shillong, Williamnagar, Tura, Nongstoin, Baghmara, etc. are also subjected to flooding due to reduction in the carrying capacity of river or stream channels. Objective: To reduce the flooding impact in an efficient manner, flood plain zoning of Wahumkhrah, Umtrew, Nonbah and Myntdu rivers was initiated along with preparation of feasibility study report for flood mitigation in the areas with human settlements. Solutions: Carry out river cross section survey as required for hydraulic modelling Suggest an optimal augmentation of network of water level gauges and rain gauges for calibration and validation of flood inundation models (number and locations) Carry out installation and data collection to meet the requirement of model calibration and validation in a satisfactory manner Prepare floodplain zoning maps for the four rivers Prepare feasibility study report for measures to reduce flood losses Organize trainings for officers of the department and other implementing agencies of the National Hydrology Project In Focus Building Climate Resilient Livelihood in Gambia Using Geospatial Technology Read more... Current Development Projects Study on Risk Management & Resilient Infrastructure Development of Inland Water Transport (IWT), Assam Read more... Hazard Mitigation & Resilience Plan, U.S. Virgin Islands Read more...	Events RMSI acknowledged as 'Partner of the Year - ISV Solution' by Esri India RMSI Webinar on Flood Forecasting & Early Warning Systems, June 2021 International Conference on Disaster Risk Management, July 2021 Expert in Focus Dr. Pratap Singh Water Resources Expert & VP - Sustainability, RMSI Read more...
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