Environmental Science Research Papers/Topics

PHYSICO-CHEMICAL CHARACTERIZATION OF KOMBOLCHA TANNERY EFFLUENT AND ITS IMPACT ON ABBA SHARO RIVER WATER DURING A DRY SEASON, SOUTH WOLLO, ETHIOPIA

Abstract: Kombolcha leather industry produces huge amounts of inorganic and organic wastes which pollute the adjacent environment including Abba Sharo River. This study was focused on characterizing the physic-chemical parameters of Kombolcha tannery effluent and evaluates its impact on the water quality of receiving Abba Sharo River water. Accordingly, two tannery effluent samples along wastewater channel at different distances have been taken and three river water samples were collected al...

IMPACTS OF Prosopis spp. ON ENVIRONMENT AND LIVELIHOODS IN EAST AFRICA: EVIDENCE FROM ETHIOPIA AND KENYA

Abstract: Most invasive alien species reengineer the host ecosystem by altering its structure and functioning so that some new ecosystem services are added and, at the same time, some existing ecosystem services are lost. Prosopis, a woody invasive tree, was intentionally introduced in dry lands of east Africa for its environmental and economic benefits. However, some 40 years later, it escaped from plantations and has invaded significant. This study investigates impacts of Prosopis on the r...

ASSESSMENT OF THE EFFECTIVENESS OF ECOSYSTEM-BASED ADAPTATION FOR LOCAL COMMUNITIES LIVING AROUND LAKE KIBARE RIPARIAN ZONE, RWANDA

Abstract: Local communities’ adaptation to climate change requires measures that simultaneously reduce poverty, protect or restore biodiversity and ecosystem services, and remove atmospheric greenhouse gases. Ecosystem-based Adaptation (EbA) involves measures for climate change mitigation and adaptation that aim to strengthen the resilience of local communities vulnerable to climate change effects. It combines measures to achieve these multiple outcomes and is particularly relevant to deve...

EFFECT OF SLOPE GRADIENT ON VEGETATION AND SOIL ATTRIBUTES OF GARA ADES PROTECTED VEGETATION IN WESTERN HARARGHE ZONE OF OROMIA REGION, ETHIOPIA

Abstract: The study was conducted at Gara Ades protected vegetation of Doba woreda, Western Hararghe Zone, Ethiopia; from October to December 2017 with the objective of analysing the woody vegetation structure, diversity and regeneration status, as well as soil status potentials under three slope gradient classes. Primarily, slope classes were set purposively; where lower slope class was (LSC: 10 - 20 %) and upper slope class was (USC: >20 - 0.05) different in the LSC, MSC and USC which is p...

FARMERS’ PERCEPTION AND ADAPTATION STRATEGIES TO CLIMATE CHANGE: THE CASE OF WOREILLU DISTRICT OF AMHARA REGION, NORTHEASTERN ETHIOPIA

Abstract: Climate change has adversely affected the livelihoods of people in developing countries where a large proportion of the population is heavily dependent on agriculture. Severe and repeated rise in temperature and rainfall failures caused loss of crops and livestock which resulted in food insecurity in Ethiopia. This study aims to investigate farmers’ perception and adaptation strategies to climate change in Woreillu District. Both qualitative and quantitative data obtained using p...

FACTORS AFFECTING SUSTAINABILITY OF IMPROVED RURAL DRINKING WATER SUPPLY: THE CASE OF MIDA-KEGN WOREDA, WEST SHOA ZONE, OROMIA, ETHIOPIA

Abstract: Universal access to and use of clean water has significant impact on improving public health, spur economic development, and reduce poverty. The main objective of this study was to investigate the rural water supply systems with case study in Midakegn woreda, in west-central Ethiopia. Both quantitative and qualitative data were collected and analyzed. Eight sample water schemes were selected from four kebeles and totally 164 representative households were identified as sample size....

HOUSEHOLDS’ PERCEPTIONS ABOUT PROSOPIS JULIFLORA AND LANTANA CAMARA: THE CASE OF AMIBARA AND TULO DISTRICTS OF AFAR AND OROMIYA NATIONAL REGIONAL STATES, ETHIOPIA

Abstract: This study explores households’ perceptions about the effects of Prosopis juliflora and Lantana camara invasions in Amibara and Tulo districts of Afar and Oromia National Regional States of Ethiopia, respectively. The study used cross-sectional data collected from 260 randomly selected households, 130 households from each district, from 15 selected kebeles through semi-structured questionnaire. To measure households’ perceptions about the invasive species, perception index was ...

ASSESSING VULNERABILITY OF SMALLHOLDER FARMERS’ TO CLIMATE CHANGE AND ADAPTATION STRATEGIES IN DOBA DISTRICT, WEST HARARGHE ZONE, ETHIOPIA

Abstract: Agricultural sector plays a key role in Ethiopia’s economy, but the sector and smallholders farmers are susceptible to climate change due to high dependence on erratic rainfall. This study therefore sought to assess vulnerability of smallholder farmers to climate change and adaptation strategies in Doba district, West Hararghe Zone, Ethiopia. Long-term rainfall and temperature data were obtained from National Meteorological Agency (NMA) of Ethiopia. Rainfall and temperature data ...

PESTICIDE APPLICATION PRACTICES AND THEIR LEVEL OF TOXICITY ON HONEYBEE (Apis mellifera bandasii) AT LEMO DISTRICT, HADIYA ZONE, SOUTHERN ETHIOPIA

Abstract: In Ethiopia, the need for pesticides in improved agriculture is increasing but unwise application it has a subsequent effect on honeybees. Hence, the study was aimed to assess beekeeping and pesticide application practices and to identify the toxicity of pesticides on honeybee (Apis mellifera bandasii) at Lemo district, Hadiya Zone, Southern Ethiopia. Questionnaires were organized to collect survey data. Toxicity of pesticides were identified using laboratory via feeding, contact a...

Manufacture of fly ash based coagulants for use in water treatment

Abstract: Fly ash was explored as a raw material for the production of three fly ash-based coagulants being raw, calcined and calcined– sodium hydroxide complex coagulants. Calcined fly ash and calcined fly ash – sodium hydroxide complex coagulants were prepared by calcining raw fly ash at a temperature of 800ºC and all three were acid washed with hydrochloric acid before being used as coagulants. A fly ash sample from a local coal fired power plant was characterization by means of an X...

Carbonate-silicate inclusions in garnet as evidence for a carbonate-bearing source for fluids in leucocratic granitoids associated with granulites of the Southern Marginal Zone, Limpopo Compl

Abstract: We present a study of carbonate-bearing polyphase inclusions in garnets from leucocratic granitoids intruding metapelitic granulites of the Southern Marginal Zone (SMZ) of the Neoarchean Limpopo high-grade complex, South Africa, during the post-peak stage (2710–2650 Ma; U-Pb ages for zircons and monazites). Ternary feldspar thermometry suggests that the granitoid magma cooled from temperatures 800–900 °C at a pressure of ca. 6.5 kbar. Abundant CO2 fluid inclusions in quartz an...

Multistage gold mineralization events in the Archean Tati greenstone belt, northeast Botswana: constraints from integrative white mica Ar/Ar, garnet U-Pb and sulfides Pb/Pb geochronology

Abstract: The Tati Greenstone Belt (TGB) in northeastern Botswana hosts numerous Au deposits (Shashe, Mupane and Signal Hill) associated with sulfides, garnet and white mica. In this study, integrative white mica Ar/Ar, garnet U-Pb and sulfides Pb/Pb dating techniques were combined with whole rock and sulfide Pb isotope characteristics to track the source(s) of gold and constrain the timeframes of gold mineralization events. All sulfides and arsenopyrite samples from the TGB yielded overlapp...

Surface water demand and supply of Gaborone city and surrounding areas under climate change and population growth

Abstract: The adequate supply of the ever-increasing demand of fresh water continues to be a global challenge due to increase in population. The anticipation for better lifestyles and improved water supply has resulted in an increase in migration from rural settlements leading to an increase in the populations of many cities globally. This study therefore investigates the variability and trends in the surface water demand and supply of the city of Gaborone and surrounding areas in respon...

Corrosion resistance of AA2036 and AA7075-T651 in contaminated acid chloride environments

Abstract: In the present study, an assessment on corrosion resistance of aluminium alloys type AA2036 and AA7075-T651 in varying solution consisting of acidic, saline and in contaminated acid-chloride environments was investigated using weight loss and electrochemical techniques. The as-received samples were sectioned into corrosion coupons polished, degreased and weight taken. Solutions containing 3.5 % NaCl, 0.5 M HCl, 0.5 M H2SO4 were prepared as corrosion media and combination of these s...

Provenance of Garnet in the neoarchaen verbaard granitoid gneiss:complexity of characterizing granitoids in high-grade terranes

Abstract: Neoarchean granitoids are commonly exposed along Archean high-grade metamorphic terranes, where they occur as granitoid gneisses. A number of issues, including the effect of overprint event(s), can complicate the characterization of these granitoids in Archean terranes. A case study is presented here highlighting the complexity of characterizing Neoarchean granitoid magmatism from the Limpopo Complex high-grade terrane in southern Africa. Neoarchean granitoids occurring within the ...


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