http://rulrepository.ru.ac.bd/handle/123456789/123 Tue, 07 Apr 2026 21:42:57 GMT 2026-04-07T21:42:57Z http://rulrepository.ru.ac.bd/handle/123456789/940 Study of Some Environmental Parameters at Rajshahi City Keka, Ishrat Ara Environmental parameters such as humidity, rainfall, temperature, bright sunshine hour, wind speed, dew tempe~ature and soil temperature of Rajshahi City were studied for the period 1995 to 1999. This was performed in order to interpret the climatic pattern of this City . Also trace elements including heavy metals in different winter vegetables grown around Rajshahi City were determined using PIXE technique. Results of some biologically important elements are discussed in detail. This Thesis is Submitted to the Department of Physics, University of Rajshahi, Rajshahi, Bangladesh for The Degree of Master of Philosophy (MPhil) Fri, 01 Jan 1999 00:00:00 GMT http://rulrepository.ru.ac.bd/handle/123456789/940 1999-01-01T00:00:00Z http://rulrepository.ru.ac.bd/handle/123456789/939 Study of groundwater conditions in the western part of grenter Rajshahi distric Haque, Md. Nozibul With the phenomenal increase in the use of groundwater in recent years, nee9 for helter understanding of the functioning of groundwater reservoirs in response to natural and man-made conditions in the system has come to the fore. The objective of groundwater exploration is to locate aquifers capable of yielding water of suitable quality and eco11om1c quantities for different purposes. Groundwater resource, although replenishable, is not inexhaustible. But the un·controlled exploration of this limited · resource has caused many environmental degradation which calls for the need to adopt scientific use of this natural resource. The wide and uneven distribution of underground water thus necessitates detailed study in specific areas for the conservation of this vital resource. The present study area- a part of Barind Tract- which is one of the ma.1or physiographic unit of Bangladesh- lies in the Western part of greater Rajshahi district. In recent years, the groundwater crisis of this area is highlighted. The present work attempts to study the feasibility of groundwater development in this region. Lithological data are an important source of hydrogeological investigation. The borehole data of Bholahat, Shibganj, Gomastapur, Nachole, Nawabganj, Godagari, Tanore and Niamatpur o.f greater Rajshahi district are processed, analyzed and .interpreted for the evaluation of groundwater condition. A Fence diagram has been prepared which clearly shows that the area mainly consists of three sub-surface geological formations: a top clayey layer, sandy layer of different grain size and at the bottom an impermeable clay zone. Computer aided groundwater maps have been prepared for qualitative and quantitative assessment of the aquifer system. The transmissivity and specific draw down maps prepared with their estimated values support the Eastern and Western sides favorable for well development. Maps of composite sand thickness and yield index have been presented for qmilitative study of groundwater potentiality in different regions of the area investigated. Interfacing planes between different geologic formations have been prepared m1cl presented for the necessaty assessment of the variation of individual subsurface stratum in different parts of the study area. Some representative cross-sectional views have fl lso been illustrated. The natural groundwater flow directions have been determined and the flow rate in different parts of the area has also been estimated. It is observed that the groundwater course is influenced by the topography and the upper surface of the impenneable zone. The fluctuation of groundwater level from 1986 to l 995 has been studied. The hydrographs show a gradual fall of water level since 1992. During this period the total amount of water discharged from and recharged to the aquifer system has been estimated and a negative balance is observed. finally, relc1ting to the investigated area, a few potential zones have been identified for groundwi1ter development. This Thesis is Submitted to the Department of Physics, University of Rajshahi, Rajshahi, Bangladesh for The Degree of Master of Philosophy (MPhil) Wed, 01 Jan 1997 00:00:00 GMT http://rulrepository.ru.ac.bd/handle/123456789/939 1997-01-01T00:00:00Z http://rulrepository.ru.ac.bd/handle/123456789/938 A Study of Bonding and other Related Properties of Some Rutile type Oxide Crystals. ISLAM, MD. KHADEMUL A theoretical analysis of the interionic potential in four rutile-type oxide crystals has been made within the framework of ionic model using eight repulsive interactions including one proposed in this work. The sui tabi 1 i ty of the new £-nteraetion, potentia 1 as applied to these system is discussed. A new complete set of polarizability values of the ions concerned has also been derived. The lattice energy and pressure derivative of bulk moduli are evaluated for the entire family of crystals under study. The resulting values are compared with the available ex~erimental data and other recent theoretical calculations. We have also considered the question of the degree of ,ionicity of the compounds under study as there seems to be some controversy regarding these in literature.The present study indicates that the bonding in rutile although some covalent contri is predominantly ionic, bution is present. This Thesis is Submitted to the Department of Physics, University of Rajshahi, Rajshahi, Bangladesh for The Degree of Master of Philosophy (MPhil) Sun, 01 Jan 1989 00:00:00 GMT http://rulrepository.ru.ac.bd/handle/123456789/938 1989-01-01T00:00:00Z http://rulrepository.ru.ac.bd/handle/123456789/907 Climate Change and It's Impact on Ground Water Resources in Northwest Bangladesh Rahman, Md. Moshiur Northwest region of Bangladesh is one of the most water stressed region of the country. All the rivers and cannels of the area dry up during the dry season and make the people completely dependent on groundwater. Cultivation of dry season rice which is the lifeline of the livelihood in the most part of the region completely relies of groundwater supply. Scarcity of groundwater for irrigation during the recent years has hampered the agricultural production in the area. Prolonged absence of groundwater within the operating range of shallow tube-wells during the dry season is a growing concern in the area. It is anticipated that climate change will aggravate the situation in near future. A study has been carried out in the present research to identify the causes of groundwater scarcity, estimate the groundwater demand, project the future climate, and to assess the impacts of climate change on groundwater scarcity in the northwest districts of Bangladesh. Long-term groundwater hydrographs are analyzed and correlated with standardized precipitation index to identify the probable causes of groundwater scarcity in the region. Climate models are run with IPCC B2 SRES scenario to project the future change of climate in the region. The projected climatic parameters are then used to estimate the change in irrigation demand in the context of climate change. Finally, the impacts of changing irrigation demand on groundwater level are assessed. The study revealed that recurrent droughts, rapid expansion of groundwater based irrigation and cross-boundary anthropogenic interventions are the main causes of groundwater scarcity in the area. The climate models project an average increase of temperature and rainfall in the region. This will cause an increase of water requirement for land preparation, evapotranspiration and effective precipitation during irrigation period. However, there will be no appreciable change in overall irrigation water requirement as the irrigation period will be substantially shortened by the increased temperature. The study revealed that the climate change will cause an increase in daily use of water for irrigation in the end of this century. As groundwater is the main source of irrigation, higher abstraction rate of groundwater for irrigation will cause a negative impact on groundwater level which in turn will negatively affect the prevailing situation of groundwater scarcity in the area during the dry season. This Thesis is Submitted to the Department of Physics , University of Rajshahi, Rajshahi, Bangladesh for The Degree of Master of Philosophy (MPhil) Sat, 01 Jan 2011 00:00:00 GMT http://rulrepository.ru.ac.bd/handle/123456789/907 2011-01-01T00:00:00Z