Flood Studies at IWFM Saiful Islam Associate Professor Institute of Water and Flood Management (IWFM) Bangladesh University of Engineering and Technology February 24, 2009

Floods and IWFM Institute of Flood Control and Drainage Research was established in 1974 and later renamed as the Institute of Water and Flood Management (IWFM) in The Institute pursues research and capacity development in the field of water and flood management that is vital for economic development and social prosperity of the country.

IWFM Vision IWFM is a premier institute for the advancement of knowledge and development of human resources in water and flood management. Mission To promote integrated water resources management.

Recent Studies on Flood Improving Flood Forecasting of Bangladesh using Artificial Neural Network (ANN) and Remotely Sensed Rainfall Data. Hydrologic Aspects of Flood _2007.pdf _2007.pdf Investigation of Hydrological Aspects of Flood-2004 with Special Emphasis on Dhaka City. %202004%20study-%20final%20report.pdf %202004%20study-%20final%20report.pdf

Some of the past studies at IWFM Performance evaluation of FCD/FCDI projects during 1998 flood. Effects of Coastal Phenomena on the 1998 Flood. Modalities for Environmental Assessment: Flood Loss Control in Bangladesh in Integrating Environmental Considerations into economic policy Making Processes. Hydrologic Characteristics of 1998 Flood in Major Rivers

Performance Evaluation of FCD/FCDI Projects during 1998 Flood Review of Flood Management Practices with respect to 1998 Flood: A Thematic Study. Impact of 1998 Flood on Dhaka City and Performances of Flood Control Works. Flood Control in a Floodplain Country: Experiences with Bangladesh. Flood Frequency Analysis, Component of the Study on Revision of Flood Danger Levels in Bangladesh

Flood Study on Dhaka City A study was carried out immediately after flood 2007 with the following objectives:  to explore the causes of the flood 2007  to investigate the hydrologic aspects of flood 2007  to compare Flood 2007 with major historic floods  to determine the extent of flood 2007  to evaluate the performances of flood control structures around Dhaka city

River System surrounding Dhaka City

Hydrographs

Flood Stats ParametersRiverGauge Station Height of peak flood level in meter above Danger Level BurigangaDhaka TuragMirpur Tongi KhalTongi BaluDemra BurigangaDhaka Duration of flood in days above Danger Level TuragMirpur Tongi KhalTongi BaluDemra20---

Flood Control Works

Performance of Flood control works around Dhaka city

Rampura temporary pump station shows negligible impact on drainage congestion

Temporary pumps near Hazaribag discharge untreated waste water which cause serious pollution of Buriganga river

Dredging in Turag river filsl wetlands of Dhaka west. Serious thread to retention ponds of Goran chatbari pumping stations.

Encroachments gradually increases and reduces retention pond area of Kallayanpur pump station

Floating mat of waste on Dholai khal indicates poor solid waste management of the Dhaka city

Water hayacintih grows due to polluted water comes from the pumping of untreated drainage water inside embankment

Improving Flood Forecasting of Dhaka Using Artificial Neural Network Ganges-Brahmaputra-Meghna Basins

Boundary Stations as Input Node

Measured Versus Predicted

Goodness Fit Time (days) Goodness-of-FitWater Level R2R2 RMSE (m) MAE (m) Maximum Error (m) Error Standard Deviation (m)