Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Keyword
-
- Physical Sciences (132)
- Biological Sciences (40)
- Tanzania (37)
- Sediments (15)
- Mathematics and Computational Sciences (11)
-
- Lake Victoria (10)
- Fish (7)
- Tectonics (7)
- Adsorption (5)
- Conservation (4)
- Ecosystem (4)
- Heavy metals (4)
- Lake Tanganyika (4)
- Pollution (4)
- Deforestation (3)
- Fisheries (3)
- Forest (3)
- Geochemistry (3)
- Groundwater (3)
- Maize (3)
- Mineralogy (3)
- Mwanza (3)
- Seismic (3)
- Soil (3)
- Zanzibar (3)
- Africa (2)
- Annual effective dose (2)
- Anthropogenic activities (2)
- Biogas (2)
- Clarias gariepinus (2)
- Publication Year
- Publication
-
- Tanzania Journal of Science (183)
- Independent Study Project (ISP) Collection (6)
- Earth and Environmental Sciences Faculty Publications (3)
- IGC Proceedings (1977-2023) (3)
- Publications and Research (2)
-
- Coal Geology & Exploration (1)
- Department of Earth and Atmospheric Sciences: Faculty Publications (1)
- Dissertations - ALL (1)
- Earth, Environmental, and Atmospheric Sciences Publications (1)
- Economics Faculty Publications and Presentations (1)
- Graduate Theses, Dissertations, and Problem Reports (ETD) (1)
- International Journal of Speleology (1)
- Publications (1)
- Research, Papers & Creative Work (1)
- School of Geosciences Faculty and Staff Publications (1)
- Publication Type
Articles 61 - 90 of 207
Full-Text Articles in Entire DC Network
Evaluation Of Petroleum Hydrocarbons Contamination In Soils And Groundwater Using Electrical Resistivity And Hydrochemical Methods-Case Study: Ayetoro, Osogbo Southwestern Nigeria, Mutiu A Fakunle, Muhydeen A Ibraheem, Wasiu B Agbaje, Luqman A Abidoye
Evaluation Of Petroleum Hydrocarbons Contamination In Soils And Groundwater Using Electrical Resistivity And Hydrochemical Methods-Case Study: Ayetoro, Osogbo Southwestern Nigeria, Mutiu A Fakunle, Muhydeen A Ibraheem, Wasiu B Agbaje, Luqman A Abidoye
Tanzania Journal of Science
The presence of Petroleum Hydrocarbons (PHCs) in hand-dug wells has become a concern to the residents of Ayetoro area, Osogbo. Consequently, the detection of PHCs was evaluated using, nine Vertical Electrical Soundings (VES) and 2D electrical resistivity tomography surveys. Soil samples collected were analyzed for porosity and permeability. Hand-dug well water samples were screened for PHCs. VES revealed that second layer had high apparent resistivity of 14415.0 Ωm, indicating presence of PHCs that had penetrated to maximum depth of 19.1 m. The highest resistivity of the control points was 48.0 Ωm, indicating absence of PHCs. The 2D resistivity revealed highest …
Determination Of Aquifer Parameters From Resistivity Data: A Case Of University Of Ilorin Campus, Northcentral Nigeria, Babatunde Onawola, Saminu Olatunji, Oluwatoyin Ologe, Razak Jimoh
Determination Of Aquifer Parameters From Resistivity Data: A Case Of University Of Ilorin Campus, Northcentral Nigeria, Babatunde Onawola, Saminu Olatunji, Oluwatoyin Ologe, Razak Jimoh
Tanzania Journal of Science
A total of twenty-one (21) vertical electrical sounding (VES) data were acquired using Pz-02 resistivity meter within the Precambrian basement area of part of Ilorin Metropolis north central Nigeria to evaluate the hydraulic characteristics of aquifers. The Schlumberger configuration with half-current electrode separation (AB/2) varying from 1 m to 60 m was used. The aquifer hydraulic characteristics such as hydraulic conductivity K and transmissivity T (Ωm2) were calculated from the interpreted VES data using the concept of Dar-Zarrouk parameters. The data, processed with computer software IPI2WIN, indicated three to four geo-electric layers, namely; topsoil, clayey (wet to dry), weathered or …
Forest Structure And Climate Change Mitigation Potential: A Case Of Wilolesi And Ikonongo Forested Hills In Iringa Municipality, Tanzania, Evarist Fundisha, Hamidu Seki, Anasia Saria
Forest Structure And Climate Change Mitigation Potential: A Case Of Wilolesi And Ikonongo Forested Hills In Iringa Municipality, Tanzania, Evarist Fundisha, Hamidu Seki, Anasia Saria
Tanzania Journal of Science
Vegetation plays major roles in carbon storage and ecosystem functioning by modifying the rate of carbon fluxes thereby mitigating climate change. However, the focus of assessing the potentials for different vegetation on climate change mitigation has for so long been conducted outside cities, towns and municipalities. This study was conducted in Wilolesi and Ikonongo hills located in Iringa as representative of the Municipality forested hills in Tanzania to assess vegetation structure and their potential for climate change mitigation. Random sampling technique was employed to establish 20 rectangular plots of 20 m x 40 m (0.08 ha) in each hill to …
Seismic Attributes Analysis As A Precursor To Hydrocarbon Indicators: A Case Study Of “Ok” Field, Niger Delta, Oluwatoyin Ologe, Mary Olowokere
Seismic Attributes Analysis As A Precursor To Hydrocarbon Indicators: A Case Study Of “Ok” Field, Niger Delta, Oluwatoyin Ologe, Mary Olowokere
Tanzania Journal of Science
Seismic data volume was employed to gain more insights into the complexities of the hydrocarbon hosting units within and outside the vicinity of well control in the OK-field Niger Delta to overcome wrong deductions from complexly faulted subsurface configuration for the oilfield exploration programme. The methodology involved integration of well log with seismic data, seismic structural analysis and seismic attributes analysis. Horizons and fault interpretations were carried out to produce subsurface attribute maps. Lithologic panels derived from well log data showed that the study area is characterized by sand-shale interbedding. Two hydrocarbon bearing reservoirs were delineated within the study interval, …
Hiv/Aids Transmission Dynamics: Modelling The Roles Of Long Distance Truck Drivers, Nyimvua Mbare
Hiv/Aids Transmission Dynamics: Modelling The Roles Of Long Distance Truck Drivers, Nyimvua Mbare
Tanzania Journal of Science
A mathematical model to investigate the roles of long distance truck drivers on HIV transmission dynamics was formulated and analyzed to establish the existence of disease free and endemic equilibrium points. The results show that, the disease free equilibrium point is asymptotically stable when the basic reproduction number is less than unity and unstable otherwise. Furthermore, comprehensive analyses on the two steady states (infection free and endemic) have shown that they are both globally and asymptotically stable. Sensitivity analysis is performed on the reproduction number in order to establish the relative importance of parameters, and it shows that the truck …
Analyzing The Electricity Consumption And Costs Of Electrical-Powered Machines When There Is Orepass Failure In Underground Mine, Bartłomiej Skawina, Abubakary Salama
Analyzing The Electricity Consumption And Costs Of Electrical-Powered Machines When There Is Orepass Failure In Underground Mine, Bartłomiej Skawina, Abubakary Salama
Tanzania Journal of Science
In underground mining environment where the loss of orepasses is a dominant factor, the mine may face a challenge of improving the loading and hauling operations. Some of the options will be to rehabilitate the lost orepasses, or developing the new ones. When the rehabilitation cost is high, alternative strategies should be applied to compensate for the orepasses failure. One of the possible options is to use diesel or electric Load-Haul-Dumps (LHDs). The use of diesel-powered LHDs will increase heat and gas emissions which increase environmental concerns and ventilation costs, while adoption of electric-powered vehicles needs to be analysed. Therefore, …
Mineralogy And Geochemistry Of Shale-Hosted Copper Of The Middle Buanji Group, Chimala Area, South-Western Tanzania, Almachius Mutasingwa, Michael Msabi, Neema Jackson, Seetharamaiah Jagarlamudi
Mineralogy And Geochemistry Of Shale-Hosted Copper Of The Middle Buanji Group, Chimala Area, South-Western Tanzania, Almachius Mutasingwa, Michael Msabi, Neema Jackson, Seetharamaiah Jagarlamudi
Tanzania Journal of Science
The mineralogical and geochemical assessments are presented in this paper to constrain the mineralogy and copper concentrations of the shale-hosted copper in the Middle Buanji Group of the Upper Paleoproterozoic (1.67 Ga). The XRD analysis revealed that illite and chamosite are the major clay minerals present in the shales together with pseudomalachite, quartz, and muscovite that constitute over 95% by proportion of the sample. The minerals biotite, birnessite, ferroselite, bearsite, chloritoid, and anatase are present in association with shale-hosted copper in low amounts (i.e., <5% by proportion of the sample). The pseudomalachite [Cu5(PO4)2(OH)4] is considered as ore mineral of copper in the shales of the Middle Buanji Group. Field observations revealed the presence of different shale layers within the Middle Buanji Group such as red, grey and green/blue in which copper mineral is distributed. On average, the copper concentrations in the shale layers were unevenly distributed throughout the red-grey-green shales layers with values of 0.31 wt%, 5.2 wt% and 13.19 wt%, respectively. A noticeable amount of copper mineralization up to 25.7 wt% was restricted within the green shale layer as compared to red (0.31 wt%) and grey (10.9 wt%) layers. Keywords: Pseudomalachite; Supergene enrichment; Shale-hosted copper; Green shale layer
Climate, Vegetation, And Weathering Across Space And Time In Lake Tanganyika (Tropical Eastern Africa), Sarah J. Ivory, Michael M. Mcglue, Cara Peterman, Patrick Baldwin, Joseph Lucas, Andrew Cohen, James Russell, Justina Saroni, Emma Msaky, Ishmael Kimirei, Michael Soreghan
Climate, Vegetation, And Weathering Across Space And Time In Lake Tanganyika (Tropical Eastern Africa), Sarah J. Ivory, Michael M. Mcglue, Cara Peterman, Patrick Baldwin, Joseph Lucas, Andrew Cohen, James Russell, Justina Saroni, Emma Msaky, Ishmael Kimirei, Michael Soreghan
Earth and Environmental Sciences Faculty Publications
Climate and vegetation influence weathering rates and processes; however, evaluating the effects of each and feedbacks between systems, has yet to be accomplished for many types of landscapes. A detailed understanding of how these processes interact to shape landscapes is particularly crucial for reconciling future scenarios of changing climate, where profound alterations to both the biosphere and geosphere are anticipated. In the tropics, ecosystem services, such as soil and water quality, are linked to both vegetation and weathering processes that form a strong control on natural resources that are the foundation of many communities’ daily subsistence. This understanding is further …
Synthesis And Ftir Characterization Of Mg-Hydroxylapatite Derived From Dolostone With High Dolomite Mineral Content, Wilson L. Mahene, Charles Gervas, Askwar H. Hilonga, Revocatus L. Machunda
Synthesis And Ftir Characterization Of Mg-Hydroxylapatite Derived From Dolostone With High Dolomite Mineral Content, Wilson L. Mahene, Charles Gervas, Askwar H. Hilonga, Revocatus L. Machunda
Tanzania Journal of Science
We present the synthesis of magnesium-substituted hydroxylapatite starting from locally available dolostone. The apatite was prepared by a reaction between heat pre-treated dolostone powder with phosphoric acid, maintained at the pH of 12.5 using sodium hydroxide. The resultant material was then calcined at 500 °C, 600 °C, 700 °C, 800 °C and 900 °C. The precursor dolostone was characterized by organic elemental analyser (CHNS-O analyser), X-ray fluorescence (XRF) and Fourier transform infrared spectroscopy (FTIR), while the synthesized material was characterized by using FTIR. Results indicated that the dominant mineral in the carbonate rock materials was near-stoichiometric dolomite, while the synthesized …
Geological And Geochemical Characterisation Of Pegmatites Around Olode, Southwestern Nigeria, Razak O. Jimoh, Akinade S. Olatunji
Geological And Geochemical Characterisation Of Pegmatites Around Olode, Southwestern Nigeria, Razak O. Jimoh, Akinade S. Olatunji
Tanzania Journal of Science
Olode is prolific in terms of pegmatites, occurring in different ways as large intrusive bodies, as veins and dykes, discordantly intruding the host rocks of mica schist, gneiss and granite. This study is aimed at the geological and geochemical characterisation of pegmatites around Olode. Field investigation was undertaken to determine the occurrences and relationships of the pegmatites with the host rocks. Fresh pegmatite samples were studied petrographically and geochemically. Two main lithologically and chronologically different groups of pegmatites were distinguishable in the study area. These were the tourmaline pegmatites associated with the Older Granite rocks and the NE-SW trending beryl-bearing …
Coal Exploration Using Electrical Resistivity Method In Some Parts Of Benue Trough, Nigeria, Saminu Olatunji, Abdulgafar T. Jimoh
Coal Exploration Using Electrical Resistivity Method In Some Parts Of Benue Trough, Nigeria, Saminu Olatunji, Abdulgafar T. Jimoh
Tanzania Journal of Science
Geoelectrical resistivity sounding technique was used to delineate the occurrence and extents of coal seam. Fifteen points were sounded with Schlumberger configuration in the suspected coal deposit site bounded by longitudes 7.344° E and 7.366° E, and latitudes 7.318° N and 7.33° N. The vertical electrical sounding (VES) data were analyzed and the corresponding geo-electric parameters at various depths were modeled. The earth model within the study area was correlated with available lithology of a nearby mine site. The sounding signatures are KQHK and KHK curve types which revealed five to six distinct geo-electrical equivalent layers. The wet to dry …
Sensitivity Analysis And Uncertainty Parameter Quantification In A Regression Model: The Case Of Deforestation In Tanzania, Thadei Sagamiko, Nyimvua Shaban, Isambi S. Mbalawata
Sensitivity Analysis And Uncertainty Parameter Quantification In A Regression Model: The Case Of Deforestation In Tanzania, Thadei Sagamiko, Nyimvua Shaban, Isambi S. Mbalawata
Tanzania Journal of Science
In this paper a multiple regression model for the economic factors and policy that influence the rate of deforestation in Tanzania is formulated. Sensitivity analysis for parameters of explanatory variables using one-at-a time and direct methods is carried out and the model is fitted by classical least square (LSQ) and Markov Chain Monte Carlo (MCMC) methods. Uncertainty quantification of parameters by adaptive Markov Chain Monte Carlo methods is performed. The coefficient of determination indicates that 87% of deforestation rate is explained by explanatory variables captured in the model. Household poverty rate is found to be the most sensitive factor to …
Solar Irradiance And Enso Affect Food Security In Lake Tanganyika, A Major African Inland Fishery, Michael M. Mcglue, S. J. Ivory, J. R. Stone, A. S. Cohen, T. M. Kamulali, J. C. Latimer, M. A. Brannon, I. A. Kimirei, M. J. Soreghan
Solar Irradiance And Enso Affect Food Security In Lake Tanganyika, A Major African Inland Fishery, Michael M. Mcglue, S. J. Ivory, J. R. Stone, A. S. Cohen, T. M. Kamulali, J. C. Latimer, M. A. Brannon, I. A. Kimirei, M. J. Soreghan
Earth and Environmental Sciences Faculty Publications
Food security in a warming world is a grave concern for rapidly growing impoverished populations. Low-latitude inland fisheries provide protein for millions of rural poor, yet the impacts of high-frequency climate oscillations on these aquatic ecosystems are unknown. Here, we present a sub-annual-to-annual resolution paleolimnological reconstruction of upwelling, productivity, and algal composition at Lake Tanganyika, one of Africa's largest landlocked fisheries. The data reveal increases in diatom production at centennial-scale solar irradiance maxima, and interannual variability in upwelling linked to La Niña. Our study shows that interactions between global climatic controls and El Niño-Southern Oscillation teleconnections exert profound influences on …
Monitoring Impervious Surface Area Dynamics To Assess Urbanisation Of A Catchment: Msimbazi River Valley Dar Es Salaam, 1989 - 2015, Befrina Igulu, Elisante Mshiu
Monitoring Impervious Surface Area Dynamics To Assess Urbanisation Of A Catchment: Msimbazi River Valley Dar Es Salaam, 1989 - 2015, Befrina Igulu, Elisante Mshiu
Tanzania Journal of Science
This work examined the effects of land use and cover change on the impervious surface as a measure of urbanisation together with its driving factors such as population growth and economic development. The spatial and temporal variations of the impervious surface area were extracted from the Landsat images of the years 1989, 1995, 2005, and 2015. Data analyses involved the selection of the endmember through Minimum Noise Fraction (MNF) and Linear Spectral Mixed Analysis (LSMA) on the images. Four dominant land cover types were mapped as results, which are forest, non-forest vegetation, bare-land, and built-up area. The non-forest vegetation and …
Short Wavelength Infrared Spectral Characterization Of The Mineralogy Of Gokona And Nyabigena Andesite-Hosted Gold Deposits In North Mara, Tanzania, Emmanuel Kazimoto
Short Wavelength Infrared Spectral Characterization Of The Mineralogy Of Gokona And Nyabigena Andesite-Hosted Gold Deposits In North Mara, Tanzania, Emmanuel Kazimoto
Tanzania Journal of Science
The mineralogy of Gokona and Nyabigena gold deposits in Tanzania have been studied using Short Wavelength Infrared (SWIR) Spectrometry technique with an aim to fingerprint hydrothermal system responsible for the formation of the deposits and establish pertinent mineralogical signatures for gold deposition. Gokona and Nyabigena deposits are hosted in porphyritic andesite to basaltic andesite that contains plagioclase phenocrysts, pyroxene, hornblende and Fe-Ti oxides as primary minerals. Other minerals are actinolite, chlorite, epidote, albite and hematite, which indicate metamorphism of the rock under greenschist facies conditions. Hydrothermal alteration of the rock produced chlorite, sericite, carbonates (ankerite, siderite and calcite), pyrite and …
1-D Transport Behaviour Of Emerging Contaminants In The Unidirectional Flowing Surface Waters Of The Msimbazi River, Hossein Miraji, Eunice Mureithi, Othman Othman, Faustin Ngassapa
1-D Transport Behaviour Of Emerging Contaminants In The Unidirectional Flowing Surface Waters Of The Msimbazi River, Hossein Miraji, Eunice Mureithi, Othman Othman, Faustin Ngassapa
Tanzania Journal of Science
The primary objectives of this investigation of environmental pollution were to assess spatio-temporal concentrations and predictions of transport behaviour of pollutants in aqueous media. In order to attain these goals for the Msimbazi river, the analytical and numerical solutions to the 1-D advection-dispersion equation (ADE) implemented the first-type inlet condition. The MATLAB software was used to solve the analytical equation resulting from the ADE equation. The solution to the ADE model enabled effective prediction of contaminants’spatial distribution within a distance of 200 m from a point source in the direction of flowing water. Among the first and third-types inlet conditions, …
Soil-Plant Nutrient Cycling In Old Cocoa Farms In A Part Of South Western Nigerian Forest Belt, Olusola Afolayan
Soil-Plant Nutrient Cycling In Old Cocoa Farms In A Part Of South Western Nigerian Forest Belt, Olusola Afolayan
Tanzania Journal of Science
Apart from pests and diseases, a vital issue in the early mature of cocoa crop in Nigeria is soil nutrient degradation in relation to the ageing of the farms and annual mining of nutrients via yield harvests. Indigenous production of cocoa in southwest Nigeria has been on without fertilizer applications. This is the basis for the reduction average lifespan and productive years of the plantation. The aim of this study was to quantify the rates of soil nutrient losses via cycling channels in old cocoa farm using cocoa beans, leaves, litters, and pod husks in south western Nigeria forest belt. …
Structural, Mineralogical And Quantitative Characterizations Of Compositions Of Products Linked To Explosive Volcanic Eruption At Haleakala, Usa, Aderemi Alabi, Ibukun Akinsola, Saminu Olatunji, Comfort Ogunyinka1, Oluwatoyin Osanyinlusi
Structural, Mineralogical And Quantitative Characterizations Of Compositions Of Products Linked To Explosive Volcanic Eruption At Haleakala, Usa, Aderemi Alabi, Ibukun Akinsola, Saminu Olatunji, Comfort Ogunyinka1, Oluwatoyin Osanyinlusi
Tanzania Journal of Science
This research focused the analysis vis-à-vis structural, mineralogical and quantitative characterizations of the samples which appeared to be formed from leftover of volcanic eruption sourced from basaltic magma obtained from Haleakala Hill, USA. The results show the presence of natural minerals like pyrolusite, zincite, magnetite, quartz, and diopside with their compositional concentrations in the samples. The geophysical analysis done corroborates the results obtained from the Scanning Electron Micrograph, which confirms the porosity of one of the samples. The X-Ray Diffraction results reveal the average grain sizes of the samples to range between 16 nm and 25 nm. Sample 'A' showed …
Sedimentology And Paleocurrent Study Of The Early Triassic Rocks In The Ruhuhu Basin, Sw Tanzania, Audax Kiwango, Diwakar Mishra
Sedimentology And Paleocurrent Study Of The Early Triassic Rocks In The Ruhuhu Basin, Sw Tanzania, Audax Kiwango, Diwakar Mishra
Tanzania Journal of Science
The sedimentary succession ranging in age from Permian to Early Triassic in Ruhuhu basin was subdivided into eight informal lithostratigraphic units, identified by the symbols from K1 to K8. Manda Formation (K8) belongs to Early Triassic age and comprises two Members, i.e., Lower Kingori Member and Upper Lifua Member (150-200 m thickness). The implications of present study relate to inter and intra basinal correlations which may provide regional depositional framework from a mass of local details. Present investigation connoting the lithofacies studies in conjunction with palaeocurrent and grain size analysis of the early Triassic strata aims at interpreting the depositional …
Variability Of Selected Mineral Contents In Marine Fish From Local Markets In Tanzania, Stella Shija, Matobola Mihale, Daniel Shilla
Variability Of Selected Mineral Contents In Marine Fish From Local Markets In Tanzania, Stella Shija, Matobola Mihale, Daniel Shilla
Tanzania Journal of Science
Mineral contents (K, Na, Ca and Mg) in selected marine fish species (Alectis ciliaris, Lethrinus harak, Rastrelliger kanagurta and Siganus canaliculatus) from local fish markets were analysed in wet and dry seasons. The processing methods (frying and boiling) were also assessed for their influence on the mineral contents. Samples were randomly collected from Tanga, Bagamoyo, Dar es Salaam and Mtwara seaports, analysed using established methods and determined by Graphite Furnace Atomic Absorption Spectrometry. Mean mineral contents in individual and all analysed fish species were high during dry season compared to wet season except Ca and the difference was statistically significant …
A Survey Of Fish Parasites From Pangani Catchment And Lake Kitangiri In Singida, Tanzania, Fred D. Chibwana, Johnson G. Mshana, Jestina V. Katandukila
A Survey Of Fish Parasites From Pangani Catchment And Lake Kitangiri In Singida, Tanzania, Fred D. Chibwana, Johnson G. Mshana, Jestina V. Katandukila
Tanzania Journal of Science
Inland water fisheries are a significant source of dietary protein to human populations, and consequently they are essential economic activities worldwide. However, both natural waters and aquaculture systems, which form the freshwater fisheries are faced with a problem of fish parasitic diseases which may result in reduced productivity and market value. The present study, therefore, carried out a survey on fish parasites from the Pangani catchment (Nyumba ya Mungu dam and Lake Jipe) and Lake Kitangiri in Singida Region in Tanzania to seal the gap of occurrence, diversity and abundance of helminths. Three species of fish viz. 111 African sharptooth …
Density And Aboriginal Uses Of Wild Tree Species In Milawilila Forest Reserve In Morogoro Region, Tanzania, David Sylvester Kacholi
Density And Aboriginal Uses Of Wild Tree Species In Milawilila Forest Reserve In Morogoro Region, Tanzania, David Sylvester Kacholi
Tanzania Journal of Science
This study assessed density and local uses of wild tree species in Milawilila forest reserve, Morogoro rural district. A total of six transects were set in the forest for assessing density and diversity of trees. In each transect, three plots of 20 m x 20 m were established and all trees with Diameter at Breast Height (DBH) ≥ 10 cm were identified, counted and DBH recorded in each plot. A semi structured questionnaire was used to obtain data on the use of tree species by the locals. Data were analyzed using Microsoft Excel and Statistical Package for Social Science software. …
Mapping Of The Geological Structures Using Digital Elevation Model (Dem)-Derived Flow Direction: A Case Study Of Rungwe Volcanic Province, Southwest Tanzania, Elisante Elisaimon Mshiu
Mapping Of The Geological Structures Using Digital Elevation Model (Dem)-Derived Flow Direction: A Case Study Of Rungwe Volcanic Province, Southwest Tanzania, Elisante Elisaimon Mshiu
Tanzania Journal of Science
This study aimed to assess the potentiality of Digital Elevation Model (DEM)-derived flow direction in mapping geologic structures, specifically in areas with thick overburden of soil or volcanic materials such as in the Rungwe Volcanic Province, SW Tanzania. Clustering of flow directions based on trends of structure sets found in the study area was applied and it successfully revealed a large number of geological structures through demarcated tectonic blocks from patterns created by flow directions. Northwest–southwest (NW-SE) and NE-SW- trending lineaments are the dominant structural sets in the area whereas N-S and E-W-trending lineaments constitute the minor sets. Moreover, the …
Altitudinal Distribution And Monthly Occurrence Of Butterflies In The Kihansi Gorge Forest, Tanzania, With A Checklist Of Species, Devolent Mtui, Colin Congdon, Ivan Bampton, Parson Kalenga, Haule Leonard
Altitudinal Distribution And Monthly Occurrence Of Butterflies In The Kihansi Gorge Forest, Tanzania, With A Checklist Of Species, Devolent Mtui, Colin Congdon, Ivan Bampton, Parson Kalenga, Haule Leonard
Tanzania Journal of Science
The goal of this project was to establish a checklist of butterflies occurring in Kihansi gorge to serve as baseline for monitoring of gorge ecosystem health. The key questions were what and how many species of butterflies occur in the gorge with respect to time and space. The study was conducted between October 2005 and February 2007. Butterflies were recorded twice a week, along a walking trail, using malaise traps and sweep net. The traps were located at upper (> 750 – 1100 m), mid (> 580 – 750 m) and lower (300 – 580 m) gorge. A total of …
Mammals Inventory Of The Kihansi River Gorge In Udzungwa Mountains, Tanzania, Dennis K. Ikanda, Samuel N. Mtoka, Mustafa Hassanali, Anna Mshanga
Mammals Inventory Of The Kihansi River Gorge In Udzungwa Mountains, Tanzania, Dennis K. Ikanda, Samuel N. Mtoka, Mustafa Hassanali, Anna Mshanga
Tanzania Journal of Science
The Kihansi gorge montane forest in Udzungwa Mountains forms part of the Eastern Arc Mountains (EAM) which contain some of the most biologically diverse and endemic montane ecosystems in all of Africa. The Kihansi river gorge was opened up for hydroelectric development in the late 1990s, attracting hundreds of farming communities whose activities lead to environmental degradation and hence presumed biodiversity loss in the montane forest which is not understood. Using camera traps, an inventory of mammals of the area was conducted for 24 consecutive days. About 14 mammal species were photo captured, indicating diverse assemblage of large and medium …
Crop Pests, Control Measures And Potential Impacts In Kihansi Catchment Area, Beatrice Pallangyo, K. Mdily, C. Mkondo, A. Kibola
Crop Pests, Control Measures And Potential Impacts In Kihansi Catchment Area, Beatrice Pallangyo, K. Mdily, C. Mkondo, A. Kibola
Tanzania Journal of Science
A baseline survey which covered 349 households in Bomang’ombe and Masisiwe (Kilolo district), Kibengu and Mapanda (Mufindi district) and Chita and Chisano (Kilombero district) was conducted to identify major pests, control measures and potential impacts in Kihansi catchment area. Maize was the most predominant crop being cultivated by 55% of the total respondents in all the study districts. Pests and diseases were the major constraints to crop production, whereby cereal stem borers were the most serious pests being reported by 88.2% of respondents. Application of synthetic pesticides was the major pest control measure, being applied by 66% of the respondents. …
Understorey Bird Communities 8 And 18 Years After River Diversion In Kihansi Gorge, Udzungwa Mountains In The Eastern Arc Mountains, Tanzania, Chacha Werema, Charles A. Msuya
Understorey Bird Communities 8 And 18 Years After River Diversion In Kihansi Gorge, Udzungwa Mountains In The Eastern Arc Mountains, Tanzania, Chacha Werema, Charles A. Msuya
Tanzania Journal of Science
On the most south-western slopes of the Udzungwa Mountains in Tanzania lies Kihansi River. The river was diverted underground in 2000 to run electric turbines for electricity generation. Using mist netting, pre-diversion (in 1998 and 1999) and short term post-diversion (in 2001) effects of the river diversion on understorey birds were undertaken before and year after river diversion, respectively. Intermediate and long-term effects of river diversion on understorey birds at the same transects are non-existent. In September 2008 and August and September 2018, using mist nets, birds were surveyed at the same transects to assess whether or not there have …
Research Work And Conservation Initiatives In The Kihansi Catchment Ecosystem, Tanzania, Cl Nahonyo
Research Work And Conservation Initiatives In The Kihansi Catchment Ecosystem, Tanzania, Cl Nahonyo
Tanzania Journal of Science
Keynote Address for the Scientific Conference on Research and Conservation Initiatives in the Kihansi Catchment Ecosystem: Successes, Challenges and Way forward held at the National Carbon Monitoring Centre (NCMC), Sokoine University of Agriculture (SUA) on 24 – 27 July 2017.
Land Cover Change Detection In The Urban Catchments Of Dar Es Salaam, Tanzania Using Remote Sensing And Gis Techniques, Philip Mzava, Joel Nobert, Patrick Valimba
Land Cover Change Detection In The Urban Catchments Of Dar Es Salaam, Tanzania Using Remote Sensing And Gis Techniques, Philip Mzava, Joel Nobert, Patrick Valimba
Tanzania Journal of Science
In this study, the Maximum Likelihood (ML) classification, Normalized Difference Vegetation Index (NDVI) and Artificial Neural Network (ANN) methods were applied to three (3) Landsat images collected over time (1979, 1998 and 2014), that contained historical land cover features for the urban catchments of Dar es Salaam. Five major land cover classes were identified, mapped, and the land cover changes investigated. The major land cover changes observed from post-classification comparisons of the classified images are: the forest land losing 17.09% of its area in the period 1979-1998 to other land covers, mainly turning to grassland, and from 1998 to 2014, …
Phytoremediation Potential Of Four Heavy Metals In Soil By Chromolaena Odorata (L.) King & Robinson At The Phytotoxicity Screening Benchmarks, Gloria O. Omoregie, Beckley Ikhajiagbe, Geoffery O. Anoliefo
Phytoremediation Potential Of Four Heavy Metals In Soil By Chromolaena Odorata (L.) King & Robinson At The Phytotoxicity Screening Benchmarks, Gloria O. Omoregie, Beckley Ikhajiagbe, Geoffery O. Anoliefo
Tanzania Journal of Science
The remediative capacity of Chromolaena odorata with respect to heavy metal induced growth-stress was investigated. This was with a view to providing information on the adaptive mechanisms adopted by the test plant during the phytoremediation of selected heavy metals such as copper, manganese, zinc and cadmium. Stems of C. odorata were planted in soils polluted with Mn, Zn, Cd, and Cu at the ecological screening benchmark (ESB) of 50 mg/kg (Mn and Zn), 4 mg/kg (Cd) and 100 mg/kg (Cu) of metal per kilogram of soil, in varying concentrations of 0 ESB (control), 1 ESB, 3 ESB and 5 ESB. …