Department of Biological and Environmental Sciences: Recent submissions
Now showing items 41-60 of 82
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Biodegradation of carbofuran in soils within Nzoia River Basin, Kenya
(Journal of Environmental Science and Health, 2015-04-06)Carbofuran (2,3-dihydro-2,2-dimethylbenzofuran-7-yl methylcarbamate) has been used within the Nzoia River Basin (NRB), especially in Bunyala Rice Irrigation Schemes, in Kenya for the control of pests. In this study, the ... -
Antimicrobial Coumarins from the Oyster Culinary-Medicinal Mushroom, Pleurotus ostreatus (Agaricomycetes), from Kenya
(International Journal of Medicinal Mushrooms, 2016-01-01)Pleurotus ostreatus has been widely used as food because of its nutritional and medicinal properties. These have been attributed to the presence of macronutrients, minerals, vitamins, and amino acids, among other secondary ... -
Stochastic drought forecasting exploration for water resources management in the upper Tana river basin, Kenya
(IGI Global, 2016)This chapter presents the trend of drought as a stochastic natural disaster influenced by the climate variability for the upper Tana River basin in Kenya. Drought frequency, duration and intensity in the upper Tana River ... -
Detection of spatial, temporal and trend of meteorological drought using standardized precipitation index (spi) and effective drought index (edi) in the upper Tana river basin.
(Scientific Research Publishing, 2018-07-17)Drought events across the world are increasingly becoming a critical problem owing to its negative effects on water resources. There is need to understand on-site drought characteristics for the purpose of planning mitigation ... -
Evidence of hydrological extremes primarily driven by human land use changes in tropical African basins
(2018-04)The sensitivity of basins to human alterations on land and their associated hydrological impacts is a subject of on-going research and is particularly poorly understood especially in tropical African basins. Oftentimes ... -
Simulation of the hydraulics and treatment performance of horizontal subsurface flow constructed wetland treating greywater
(Science Publishing Group, 2018-05-10)Constructed wetlands (CWs) have evolved as some of reliable wastewater treatment technologies. Various types of CWs differ in their main design characteristics and in processes responsible for pollutant removal. Classification ... -
Determination of discrete particles optimum design parameters for surface irrigation system settling basin
(2018-06-05)Irrigated agriculture is faced with challenges that include sediment loading in the river basins and dams. The management of sediments in river basins and waterways has been an important issue for water managers throughout ... -
Drought forecasting under climate change scenarios using artificial neural networks for sustainable water resources management in upper Tana river basin, Kenya
(Elsevier, 2018-07-10)Climate change has continued to impact negatively on water resources globally. For instance, extreme weather conditions especially the drought phenomena have become frequent in Africa. This has prompted water engineers and ... -
Bathymetric survey of lake Naivasha and its satellite lake Oloiden in Kenya; using acoustic profiling system
(wileyonlinelibrary.com/journal/lre, 2018-10-23)Lakes and reservoirs play important roles as freshwater sources for domestic, indus-trial, agricultural, fisheries and recreational purposes. However, for the lakes to be sustainably exploited, there is need to understand ... -
Comparative assessment of the effect of climate change and human activities on streamflow regimes in central rift valley basin, Ethiopia
(Science and Education Publishing, 2019)Climate change and anthropogenic activities are the main driving factors for changes in hydrological processes of a given watershed. This research was conducted to assess the relative contribution of climate change and ... -
Geochronological and spatial distribution of heavy metal contamination in sediment from lake Naivasha, Kenya
(Taylor & Francis, 2019-01-02)Sediment cores hold large information on the history of human interactions with lakes and surrounding environments. Hence, this study investigated the geochronological and heavy metals characteristics of sediment from Lake ... -
Assessment of water flow and sedimentation processes in irrigation schemes for decision-support tool development: a case review for the Chókwè irrigation scheme, Mozambique
(Multidisciplinary Digital Publishing Institute, 2019-02-28)Water flow and sedimentation processes have been significantly erratic at the Chókwè Irrigation Scheme (CIS) and have affected its hydraulic performance. Given its expansion there is need to understand these processes ... -
Sanitation challenges in learning institutions: the case of Nakuru municipality, Kenya
(WEDC, Loughborough University, 2009-05-27)Sanitation challenges in learning institutions: the case of Nakuru municipality, Kenya. IN: Shaw, R.J. (ed). Water, sanitation and hygiene - Sustainable development and multisectoral approaches: Proceedings of the 34th ... -
Analysis of spatial and temporal drought variability in a tropical river basin using palmer drought severity index (PDSI)
(Academic Journals, 2017-08-31)Analysis of spatial and temporal drought variability in the upper Tana River basin using Palmer Drought Severity Index (PDSI) was conducted. The drought is critical for formulation of mitigation measures in the river ... -
Analyzing the Mara river basin behaviour through rainfall-runoff modeling
(Scientific Research Publishing, 2017-09-14)Hydrological models are considered as necessary tools for water and environmental resource management. However, modelling poorly gauged watersheds has been a challenge to hydrologists and hydraulic engineers. Research done ... -
Analysis of drought and wet-events using SWSI-based severity-duration-frequency (SDF) curves for the upper Tana river basin, Kenya
(Science Publishing Group, 2018-06-12)Drought and wet-event patterns in the Upper Tana River basin have significantly been changing due to variation of climatic and human-induced factors. This paper presents the analysis of drought and wet-events using ... -
The effect of climate change on loss of lake volume: case of sedimentation in central rift valley basin, Ethiopia
(Multidisciplinary Digital Publishing Institute, 2018-12-11)Evaluating the impact of climate change on sediment yield has become one of the major topics in climate research. The purpose of this study was to investigate sediment yield contribution to lake volume change under ... -
Soil erosion management at a large catchment scale using the RUSLE-GIS: the case of Masinga catchment, Kenya
(WIT Press, 2004-08-23)Kenya is one country suffering heavily from land degradation due to increasing anthropogenic pressure on its natural resources. As is common to many tropical countries, Kenya suffers from a lack of financial resources ... -
Evaluating performance of vertical flow constructed wetland under various hydraulic loading rates in effluent polishing
(IWA Publishing, 2011-06-01)The discharge of untreated wastewater or partially treated effluent and runoff from agricultural fields into water bodies is a major source of surface water pollution worldwide. To mitigate this problem, wastewater treatment ... -
Characterization of greywater from urban and peri-urban areas of Nakuru municipality, Kenya
(Loughborough University, 2009)Kenya faces serious challenges regarding water and sanitation services. Despite many years of government investment, existing facilities continue to deteriorate and have also failed to meet the demand of increasing ...