Environmental & Physical Sciences

Research Papers/Topics in Environmental & Physical Sciences

Spatial-Temporal Changes Of Landcover Types In Response To Anthropogenic Dynamics In Yala Swamp, Siaya County, Kenya

ABSTRACTResearch in wetlands has made great progress and it is widely recognized globally that they are under threat of disappearing and degradation due to overexploitation of their products and services. The study was undertaken in Yala wetland that covers an area of 17,500 ha in an area with one of the highest population density and growth rate in Kenya. The wetland is mainly cleared for crop cultivation and settlement and about 2,800ha (Figure 4.14) have been drained for commercial agricul...

Residual Effects Of Insecticide-based Malaria Control Interventions On Malaria Vectors And The Status Of Insecticide Resistance In Western Kenya

Malaria is a human disease caused by a sporozoan from the genus Plasmodium, transmitted by a bite of Anopheles mosquitoes. Insecticides remain the major tool for control of malaria vectors in Kenya and therefore the potential of such programs to be compromised by the reported insecticide resistance is a major concern. Studies in western Kenya have reported reemergence of morbidity and malaria attributed child mortality which has been linked to reported spread of ...

Anthropogenic Impacts Of Land Use And Land Cover Changes On Mai Mahiu Ecosystem, Nakuru County, Kenya

ABSTRACTLand-use changes are the main cause of human and environmental problems especially inmany developing countries in Africa and Asia. Study was conducted in Mai Mahiu,Nakuru County, Kenya whose aim was to assess the impacts of land-use and coverchanges on the ecosystem functioning and human environment. Specific objectives were:(i) to understand the nature of land use practices (ii) to monitor impacts on soil quality;(iii) impacts on vegetation composition and structure; (iv) to ex...

Species Abundance, Composition And Colonization Behaviour Of Malaria Vectors In A Semi-arid Ecosystem Of Baringo District, Kenya.

Malaria is one of the public health problems facing people in many parts of Kenya including semi-arid areas. It is caused by an infectious bite of female Anopheles mosquitoes. To effectively implement malaria control program, the knowledge of colonization, resting behavior of the vectors and effect of distance between houses and breeding habitats on mosquito abundance is required. This research set out to determine seasonal dynamics, outdoor resting habits and coloniz...

Evaluating Payment Potential Forenvironmentalservices And Watershed Conservation Of Thika Dam, Murang’a County, Kenya

ABSTRACTPayment for Environmental Services is a concept that is increasingly being adoptedas anincentive-basedapproach in natural resource management. It links the suppliersand consumers of environmental goods and services in a way that both parties cancontribute to improved delivery. The main environmental goods and services tradedare carbon, biodiversity, aesthetics and water. The predominant attitude towardswatershed management in many parts of the world is that water will always flo...

The Impact Of Communication Of Water Quality Information On Awareness Creation Within Primary Schools In Nakuru Municipality, Nakuru County

Nakuru municipality has serious water resource problem brought about by contamination and pollution of the drinking water. The Water source within most of the schools in Nakuru municipality is from piped water mains, rain / boreholes, roof catchment, dams and pans and shallow wells. This study was on impact of communication of water quality information on awareness creation within primary schools in Nakuru Municipality. The purpose of the study was to find out whether...

Motivation And Its Impact On Workers’ Productivity In Construction Firms In Lagos, Nigeria

ABSTRACT Motivation is considered as an important tool for enhancing worker’ productivity. Construction sector is not an exception. It has been empirically established that motivation has positive impact on construction worker’s productivity. Moreover, empirical studies have shown that productivity in the sector has been decreasing globally. This study therefore aims at examining the relationship between motivation, resistance and productivity and develops a model of this relationsh...

Challenges And Opportunities Of Participatory Management Of Upland Wetland In Kiambu County, Kenya

Wetlands are continuously degraded via agricultural activities, pollution and settlement. In Lari sub-county for example, increase in population pressure, decline in soil fertility, unreliable rainfall plus quest for food security is forcing the farmers to encroach on the seemed idle Upland wetland. Opportunity for conservation of this wetland lies on the participatory approaches that can be embraced at local level helping in conservation of this vital natural resourc...

Effects Of Commercial Chemical Products On Maize Yield In Different Agro-Ecological Zones In Kenya

ABSTRACTCrop production in Central and Western Kenya is mainly restricted by nitrogen (N) and phosphorus (P) deficiency and limited investment capacity in N and P inputs by smallholder farmers. Nutrient inputs to the soil are often utilised inefficiently due to environmental factors, soil related factors (e.g., P fixation by sesquioxides) and management factors. Integrated soil fertility management (ISFM) practices aim at maximizing the use efficiency of applied nutrients. This study sought t...

Consumption And Conservation Of Drylands’ Indigenous Fruit Trees For Rural Livelihood Improvement In Mwingi District, Kenya

AbstractAt present, fruit consumption in Kenya is well below Food and Agriculture Organization (FAO) recommendations, and promotion of a diversity of indigenous fruit tree species could thereby bring significant enhancements in nutritional security, especially in rural areas. Despite the importance of IFTs in the livelihoods of rural communities and wide natural occurrence in dry areas of Kenya, their promotion has not been adequately fostered. Consequently, they remain underutilized. A surve...

Attitudes Influencing Adoption Of Biogas Fuel Among Workers And Learners In Selected Christian Based Training Institutions In Nandi County, Kenya

ABSTRACT Over-dependence on unsustainable wood fuel and other forms of biomass energy as the primary source of fuel to meet household energy needs has contributed to environmental drawbacks. Adoption of biogas as alternative source of energy has many advantages including conserving trees, being cheap and clean. Biomass energy contributes 68% of the national energy requirements and is expected to remain the main source of energy in the foreseeable future. The main purpose of the study was to a...

Challenges And Opportunities Of Incorporating And Teaching Environmental Education In Adult Literacy Curriculum In Kisau Division, Makueni County, Kenya

ABSTRACT This research was carried out to investigate the challenges and opportunities of incorporating and teaching Environmental Education in adult literacy curriculum in Kisau Division in Mbooni-East District. The study was extended to the entire Makueni County to acquire comprehensive data regarding general administrative and management practices of the curriculum. A total of 100 adult education learners, 18 adult literacy teachers, 10 Division Adult Education Supervisors, and 3 Dis...

Suitability Of Waste Water Sludge For Agricultural Use: A Case Study Of Ruai Sewage Treatment Plant, Nairobi, Kenya

AbstractInformation on heavy metals in sewage sludge is important as it forms a vital baseline for among others the detection of undesirable effects when used in agriculture as a fertilizer. The aim of this study was to determine the suitability of waste water sludge from Ruai waste water treatment plant for agricultural use. The study was carried out over a period of four months from November 2012 to February 2013. The objective of the study was to find out the levels and variations of heavy...

The Effect Of Organic And Mineral Fertilizers On Soil Microbial Communities In Kabete Long-Term Experiment, Kenya

ABSTRACT Soil micro-organisms play a key role in determining soil quality. Over 70% of small holder farmers in the central high lands of Kenya are using crop manure, animal wastes and mineral fertilizers to increase their farms fertility and subsequent productivity. The dilemma with these practices is that less is known on the impact of these resources on the below ground biodiversity particularly the microbial communities. A field study was conducted at a site in Kabete where a lon...

Effectiveness Of Natural Wetland In Waste Water Treatment: A Case Study Of Tibia Wetland, Limuru Municipality, Kenya.

ABSTRACTInformation on wetland function in waste water treatment is very important as theinformation can be used to detect undesirable qualities of water. The aim of thestudy was to assess the effectiveness of natural wetlands in the treatment of wastewater. The study was carried out for a period of four months (November 2012 toFebruary 2013). The objectives of the study was to find out the physico-chemicalparameters of water from Limuru water and Sewerage Company and Bata ShoesCompany ...


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