Dissertations/Theses - Department of Water Resources Engineering
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Item Water resources planning for regional development of Bangladesh(Department of Water Resources Engineering, 1974-07) Liaquat Hossain; Rahman, Prof. GolamFor abstract please the full textItem Effect of size and unit weight of materials in bank protection(Department of Water Resources Engineering, 1975-01) Ain-un-Nishat; Abdul Hannan, Dr.A study to determine the suitability of a lighter material, such as 'burnt clay lump' which is can be made available localy, to replace stone in bank protection work was taken up. The effect of size and unit weight of materials in bank protection was studied in laboratory in a straight channel using cubical blocks made of sand-cement morter and brick. Saturated sand-cement bJ.ock had a specific gravity of 2.68 resembleming that of stone and brick blocks had a specific gravity of 2.18. Critical velocity at faiJ.ure of the blocks used as bank protective material was determined on four different side slopes. The volume of blocks was found to vary with the velocity at failure as the 6th and 7th power for sand-cement blocks and brick blocks respectively. The weight of blo.cks was found to vary with the velocity at failure as the 4.75th and 5.5th power for sand cement blocks and brick blocks respectively. It was observed that interlocking of the blocks and the waves in the channel are also major factors in the determination of proper size. of bank protective materials. It was also concluded that on a flatter side slope blocks of much less weight are required.Item Determination of deep tubewell spacing using aquifer characteristics an irrigation requirement(Department of Water Resources Engineering, 1977-08) A.K.M. Jahir Uddin Chowdhury; Khan, H.R.Relationship between deep tube well spacing in square grid tube well layout ?nd aquifer characteristics has been studied using unsteady ground water flow equations. Both constant discharge and variable discharge conditions were considered and unsteady ground water flow equations were solved with the help of an IBM 360 digital computer. Comparison was made between spacing of wells subjected to mutual interference and spacing of wells without interference. Discharge coefficient of transmissibility, storage coefficient, time of pumping, static lift and peak monthly irrigation water requirement has been used as variable parameters. The storage coefficient should be the determining factor in selecting deep tube well spacing when aquifer characteristics are considered. Some amount of mutual interference is allowable in selecting deep tube well spacing and non-interference spacing is not always practicable. It is not important to consider the variability of well discharge due to increase in drawdown at the well with time. A design chart has been developed for the selection of deep tube well spacing considering aquifer characteristics and irrigation water requirement, in square 'grid tube well layout.Item Determination of deep tubewell spacing using aquifer characteristics and irrigation requirement(Department of Water Resources Engineering, BUET, 1977-08) Jahir Uddin Chowdhury, A. K. M.; Khan, Dr. Hamidur RahmanRelationship between ~eep tubewell spacing in square grid tubewell layout and ~quifer characteristics has bsen studied using unsteady ground water flow equations. Both constant discharge and variable discharge condition,s were considered and unsteady ground water flow equations were solved with the help of an IB1 360 di~it81 computer. Comparison ~msmade between SP:1cinrc:of ~Iells subjected to mutual interference ann spacin{; of wells wj.thout interferenrJ8. Discharge, coefficient of tr~nsmissibility. stor~ge coefficient, time of pumping, static lift and peak monthly irrigation water requirement have been used as variable parameters. The ~tor~ge coefficient should be the determining factor in selecting deep tubewell spacinG whon ~Tlifer characteristics are considered. Soma amount of nutual interference is allowable in seJ..ectin~deAp tube"el:l spf'.cingf'r.dnon_interference spacing is not always practic~ble. It is not important to consider the variability OI well discharge due to increase in drswdown at the well with time, A design chnrt has boen devoloped for the selection of deep tc:;:;~:211 ~:"ncj n" f'''nRi deri n.CCflquifnr charr.cteristias rmd irrigation water requirement in square grid tubewell layout.Item Study on river course shifting pattern in Bangladesh(Department of Water Resources Engineering, 1977-09) Monayem Dad, Md.; Khan, H.R.For abstract please see full textItem Study on the erosion of the river Padma(Department of Water Resources Engineering, 1978-06) Kazi Sayedur Rahman; Khan, H.R.For abstract please see full textItem Irrigation water distribution process in spatially stratified areas of the Ganges-Kobadak project of Bangladesh(Department of Water Resources Engineering (WRE), BUET, 1978-07) A.S.M. Imdadul Islam; Arbhabhirama, AnatA study was conducted in the Ganges-Kobadak (G-K) irrigation project of Bangladesh during the ,Kharif-I (dry) season of 1978. Different aspects of water use for lowland rice and the corresponding irrigation water supply in the selected areas of the project were studied. , Results of the study revealed that seepage and percolation 'losses varied from 3.88 to 6.96 mm/day and the net water use i.e. evapotranspiration plus seepage and percolation ranged from 7.82 to 10.90 mm/day in different areas. Water supplied through the canals was found to be much more than the actual requirement and comparatively higher water supply was observed at the upstream areas. Also, no definite schedule.of water supply was found to exist in the system. High water use efficiency was found at the downstream areas compared to the upstream areas.indicating excessive loss of the supplied water at the upstream areas. On the other hand, the water adequacy was observed to be higher in 'the -areas nearer to the source of water.Item Development of unit hydrograph for the Halda river basin(Department of Water Resources Engineering, 1978-07) Md. Badiuzzaman; Khan, H.R.For abstract please see full textItem Effect of withdrawal of upland discharge on salinity intrusion in Gorai-Madhumati-Sibsa-Pussur river system(Department of Water Resources Engineering, 1979-07) Saleh Ahmed Wasimi; Khan, H.R.For abstract please see full textItem Study on the water utilization in some areas under tubewell irrigation(Department of Water Resources Engineering, 1979-11) Md. Mirjahan Miah; Khan, H.R.For abstract please full textItem Effect of supplementary irrigation on the yield of HYV rice Dacca area(Department of Water Resources Engineering, 1981-04) Abul Fazal Md. Saleh; Hamidur Rahman, Khan, Dr.Although Aus and Aman rice cover 89% of the total cropped ar'ea and yield 83.7% of the total rice output, these two crops are still grown under 'providence' methods ~ that is, by impounding rainfall inside the cropped area and depending entirely upon rainfall as a soil moisture source. The high uncertainty involved regarding availability of rainfall during transplanting and during the crop growing periods of these two predominantly rainfed crops has often meant that investments made in these crops were lost, although the mean annual rainfall in the country varies from 1400 mm in Rajshahi to over 5000 mm in Sylhet and 80% of this rainfall occurs during theAus and Arnan crop growing periods. andanaly'sing the risks associated with rainfed Aus and Arnan cul tivatidns. Exper,imental plots were taken at the farm of Bangladesh Rice Research Institute, Joydebpur. There were in all five treatments ranging from totally rainfed'plots to 25 mm to,SO mm standing water on the plots. The water balance method was applied for determining the crop water requirement with provisions for measuring rainfall, evaporation and seepage and percolation. From the study, it was observed that with supplementary irrigation increase in yield varying from 8% to 71% over rainfed condition occured during the study period for different treatments. The amount of supplementary irrigation varied from 69 mm in Aus season to 573 mrn in Aman season for the treatment of 25 to 50 mm standing water on the plots. For the saturated plot treatment a 57% higher yield over rainfed condition was observed during the Aman season and required 14.4 mrn of water from irrigation. From the analysis of rainfall data it was observed that rainfall during the crop growing period has to be supplemented by irrigation to meet the crop water requirement and to ensure a dependable yield during the Aus and Aman seasons. From probability analysis of rainfall it was found that the Aus crop requires supplementary irrigation in one out of four years and in case of Aman crop the supplementary irrigation is required in three out of four years. The amount of supplementary irrigation required varies from 0 to 67 mm for Aus season and 67 mm to 309mm for Amah season with rainfall probabilities varying from 50 to 75 percent and 25 to 75 percent for Aus and Aman seasons respectively.Item Water utilization efficiency of irrigation project - a case study of Dacca-Narayangaj-Demra project(Department of Water Resources Engineering, 1981-06) Md. Ghulam Rabbani; Khan, H.R.For abstract please full textItem Study of river bank stabilisation in a bend by groin(Department of Water Resources Engineering, 1981-07) Md. Monowar Hossain; Hamidur Rahman, KhanFor abstract please see full textItem Study of performance characteristics of some manual methods of irrigation(Department of Water Resources Engineering, 1982-01) Kamal Uddin Ahmad; Abul HannanFor abstract please see full textItem Experimental investigation of the effect of location and projection of single groin in a bend(Department of Water Resources Engineering, 1983-08) Abu Obaida Ansari Khan, Md.; Abdul Hannan, Dr.For abstract please full textItem Non-equilibrim destribution of suspended sediment(Department of Water Resources Engineering, 1983-10) Md. Abul Khair; Shahjahan, Dr. M.For abstract please see full textItem Evaporation from surfaces exposed to a thermally-stratified atmosphere(Department of Water Resources Engineering, 1984-06) Muhamed Ali Bhuiyan; Halim, Dr. M. A.For abstract please see full textItem Analysis of rainfall data for estimating the intensity duration-frequency relationship for the north-eastern region of Bangladesh(Department of Water Resources Engineering, 1984-07) Md. Abdul Matin; Mohib Uddin Ahmed, Dr. SyedFor abstract please see full textItem Investigation of local scour around bridge piers(Department of Water Resources Engineering, 1984-08) M.R. Kabir; Shahjahan, Dr. M.For abstract please full textItem Study of tidal characteristics of the Meghna delta(Department of Water Resources Engineering, 1984-08) Iqbal Matin; Chowdhury, Dr. A. K. M. Jahir UddinFor abstract please see full text