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    Proceedings of NCWRE 2018
    (Department of Civil and Water Resource Engineering (CWRE), CUET, 22-Mar-2018) Department of Civil and Water Resource Engineering (CWRE), CWRW, CUET
    ABSTRACT Hydrologic models have emerged as a basic tool for studying real processes in a watershed hydrologic system responding to various climatic forcing. Bangladesh has been formed as the greatest deltaic plain at the confluence of the Ganges, Brahmaputra and Meghna and is highly vulnerable to climate changes. For this reason, study on hydrologic model is very important for Bangladesh. To set up a hydrological model and to determine discharge of the outlet of Dharla river basin using Satellite Estimated precipitation data are the main objectives of this study. In this study, hydrologic model of Dharla river basin with drainage area of 6120 sq.km is developed using HEC-HMS. Flash flood, Monsoon flood and bank erosion are some common issues with this river basin. A lumped hydrological model is developed using HEC-HMS to simulate precipitation-runoff process. SRTM 90m resolution DEM is used for delineation of basin which is downloaded from CGIAR-CSI. River network is digitized by Google Earth. Arc map 10.1 is used for watershed delineation. In place of gauge rainfall, satellite estimated rainfall data is used. The Japan Aerospace Exploration Agency (JAXA) provide hourly data of precipitation in 0.1× 0.1-degree resolution observed by satellite. The simulation result is checked after real time data provided by BWDB at Kurigram station. The value of correlation coefficient (R2) for calibration period (2009-2012) and validation period (2013-2014) are 0.71 and 0.81 respectively. From six-year model simulation, it is found that peak discharge occurred at 2 August, 2014. The value of peak flow is 4515.4 cumec. At the time of peak flow, volume passes through outlet is 38928 million m3.From calibration and validation graph we can see that the model gives satisfactory result at dry period. At the time of high discharge, model result shows more deviation from observed data. So, GSMaP is more reliable at dry season
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    FEASIBLE AND SUSTAINABLE COASTAL PROTECTION AND ADAPTATION STRATEGIES FOR COASTAL AREAS OF BANGLADESH
    (Dept. of CE, CUET, 19-Dec-2018) Khan, R. T.; Das, P
    Bangladesh has about a 710 km long coastline with the Bay of Bengal at the southernmost part of the country. Due to the dynamic characteristics of the Meghna estuary, geographic location and climatic conditions, the coastal regions of Bangladesh are subjected to a number of challenges every year including coastal erosion, sedimentation, salinity intrusion, tropical cyclone, storm surge, tidal bores etc. This study focuses on formulating a combination of protection and adaptation strategies to mitigate and counteract the current as well as future aggravated coastal challenges due to climate change impacts. The protection strategies include structural interventions such as coastal embankments, hydraulic structures such as regulators, sluice gates, breakwaters, afforestation and bank protection works and soft adaptation measures such as rainwater harvesting, cyclone shelters, etc. The effectiveness of the existing natural protection such as hilly elevated terrain in the southeast coast, mangrove forest in the west, natural forests in the islands at the estuary as well as of the artificial measures such as coastal polders, hydraulic structures, bank protection works, etc. are assessed in this context. The results of this study will be helpful for the policy makers to adopt suitable strategies to counteract the coastal hazards and thus reduce risk to human life, livelihood, agriculture, ecosystem and biodiversity.