International Journal of
Water Resources and Environmental Engineering

  • Abbreviation: Int. J. Water Res. Environ. Eng.
  • Language: English
  • ISSN: 2141-6613
  • DOI: 10.5897/IJWREE
  • Start Year: 2009
  • Published Articles: 332

IJWREE Articles

Climate compatible development in Ethiopia: A policy review on water resources and disaster risk management of Ethiopia

September 2021

Climate Compatible Development (CCD) is an emerging development approach which seeks to minimize the threat posed by climate change while maximize the opportunities for development. In view of the adverse impact of climate change on the general development of the country, Ethiopia, a number of polices which constitute climate change mitigation and adaptation strategies have been adopted and established. Among such...

Author(s): Melaku Asmare and Mulugeta Alemu

Lactic acid from food waste enhances pathogen inactivation and urea stabilization in human urine

September 2021

In areas where conventional sewer systems are not possible, innovative and low-cost methods are needed to get rid of pathogens in human urine. Treatment through acidification is a reliable method. In this study, the effect of fresh cabbage waste, potato peel, and teff flour water as substrate for lactic acid treatment of source-separated urine was investigated. Laboratory scale batch experiments were conducted to...

Author(s): Zerihun Getaneh, Nancy G. Love, Adey Desta and Agizew Nigussie

Assessment of the physico-chemical and bacteriological quality of the waters of the quaternary aquifer of the city of Mao in Chad

August 2021

The objective of this work is to characterize the quality of drinking water in the city of Mao and its surroundings. This study is based on 20 water samples collected in the city of Mao and its surroundings between 2018 and 2020. The parameters considered are the physicochemical parameters (pH, T°, Electrical conductivity), major chemistry and bacteriological. The chemical analysis made it possible to highlight...

Author(s): MAHAMAT NOUR Abdallah, ABDERAMANE Hamit, MOUSA Abderamane and MOUSSA Batrane

Estimation of stream discharge of ungauged basins using NRCS-CN and remote sensing methods: A case study of Okhuwan and Okhaihe catchments, Benin City, Edo State, Nigeria

August 2021

The study aims to utilize the NRCS-CN and remote sensing methods in estimating streamflow of Okhuwan and Okhaihe catchments. Remote sensing data, coupled with GIS techniques were used to estimate seasonal rainfall and streamflow. Measured rainfall data was collected from the Nigerian Meteorological Service, while field measurement of streamflow was carried to generate baseline data. Measured rainfall and streamflow were...

Author(s): Isagba E. S., Izinyon O. C., Emeribe C. N., Uwadia N. O. and Ezeh C. U.

Current methodologies and algorithms used to identify and quantify pollutants in sub-basins: A review

May 2021

Over the past few years, water quality has been threatened and is vulnerable to various pollutants and climate variables. The deteriorating state of water resources/bodies has been further exacerbated by the impacts of climate change patterns in Southern Africa. Therefore, modelling and predicting the quality of water in sub-basins has become important in controlling water pollution. Remote sensing techniques gained...

Author(s): Noluthando Kheswa, Rimuka Bloodless Dzwairo, Thokozani Kanyerere and Sudhir Kumar Singh  

Water supply interruptions in Umzinto Water System: Ugu District, South Africa

April 2021

The Constitution of the Republic of South Africa states that all citizens have a right to access adequate food and water. However, water services provision has remained one of the biggest challenges faced by most municipalities. The Umzinto water supply system under the auspices of the Ugu District Municipality (Ugu DM) was selected as the study area to evaluate the water supply interruption frequency. Data range for...

Author(s): Lorraine Thulisile Mwelase and Rimuka (Bloodless) Dzwairo

Intensity duration frequency relationship of maximum rainfall in a data scarce urbanized environment: A case study of the Guma Catchment in Sierra Leone

April 2021

Rainfall intensity for a particular frequency and duration is one of the most important parameter for the hydrologic design of dam, reservoirs, storm sewers, culverts and many other hydraulic structures. This can be obtained from Intensity-Duration-Frequency (IDF) relationship, which is determined by frequency analysis of rainfall data. The goal of this research is to develop rainfall intensity-duration frequency...

Author(s): Amadu Barrie and Melvin B. D. Scott

Influence of a quasi-delegated management framework on sustainable distribution of quality drinking water in Umoja Innercore Estate, Nairobi

April 2021

Managing drinking water in its distribution pathways is one of the main indicators of the quality of service provided to the consumer. Its quality management is important since human health and livelihoods depend on adequate, clean, reliable water supplies. Unfortunately, this is not true to many neighborhoods in developing countries and the quality of water distributed in Umoja Innercore is no exemption. This research...

Author(s): Nyakundi Victor, Munala Gerryshom, Makworo Micah, Shikuku James and Ali Muhammad

Potential of Moringa oleifera seeds and fuel wood ash as adsorbent of dye and organic matter in wastewater from batik producing enterprises

April 2021

Treatment of effluents from batik producing enterprises to removal dyes and other impurities is inevitable as these enterprises are becoming ubiquitous in many cities in Tanzania. Wastewater from batik production processes are discharged haphazardly without treatment. In this study, preliminary results on adsorption potential of defatted Moringa oleifera crude seed extract (DMOCSE) and fuel wood ash (FWA) for dye and...

Author(s): Nancy Jotham Marobhe, Fredrick Salukele and Shadrack Mwita Sabai

City scale water audit of a pilgrimage town in South India

March 2021

The water need of a religious pilgrimage town in South India would typically be much larger than a regular town where religious  pilgrims  and  ritual  activities  do not add  to the water burden of the municipality. To understand this added water burden, a city scale audit was carried out to estimate the water supply, demand and deficit at Guruvayoor, which is a pilgrimage town in South...

Author(s): Merin Mathew, Sunny George, Ratish Menon and John Tharakan  

Water quality assessment of Ntawogba Stream in Port Harcourt metropolis, Rivers State, Nigeria

March 2021

Ntawogba stream is one of the natural water bodies that drain the marshy swamp forest water from Port Harcourt municipality into Amadi Creek which empties into the Bonny estuary. Water quality assessment was carried out for three consecutive months (July - September) across three sampling points (upstream, midstream, and downstream). The physical parameters pH, temperature, EC, and turbidity were measured in-situ. The...

Author(s): Kalagbor Ihesinachi A., Echem Ogbonda G. and Banwo Elechi  

Impacts and uncertainties of climate change on stream flow of the Bilate River (Ethiopia), using a CMIP5 general circulation models ensemble

February 2021

The impact and uncertainty of climate change on stream flow of the Bilate River Watershed was assessed. Ensemble of 20 Coupled Model Intercomparison Project Phase 5 (CMIP5) general circulation models (GCMs) under two Representative Concentration Pathways and six GCM structures were selected to form 24 future climate scenarios for the watershed. Soil and Water Assessment Tool (SWAT) model was selected to simulate stream...

Author(s): Getahun Garedew Wodaje, Zewdu Eshetu Asfaw and Mekuria Argaw Denboba  

Assessment of soil and water characteristics and land cover changes along the Tigris River in Baghdad

February 2021

Land cover changes impact the soil and water quality which are critical for environmental and human health. The goal of this study is to evaluate whether the land cover change along the Tigris River, one of the largest rivers in the Middle East, is causing any heavy metal contamination. The objectives of this study were: (1) To analyze the metal concentrations in the water and soil samples along the Tigris River and (2)...

Author(s): Hanan H. Ali, Jason A. Rosenzweig, Shishir Shishodia, Daniel Vrinceanu, and  Balaji Bhaskar Maruthi Sridhar    

Indigenous knowledge assessment on irrigation water management practices at Western Showa Zone, Ethiopia

February 2021

Farmers practices in irrigation water management mostly from indigenous knowledge but the potential of such knowledge is not much understood in terms of irrigation water management in West Showa. Therefore, this study was carried out based on the objective to identify the indigenous knowledge on irrigation water management of the West Showa. The survey was conducted at West Shoa Zone, Dandi, Ambo, Toke Kutaye, Liban...

Author(s): Oli Frrisa Kuli and Kalkidan Degefa  

Impact of land use/land cover change on hydrologic processes in Dijo watershed, central rift valley, Ethiopia

January 2021

The aim of this study was to assess the impact of land use / land cover changes on the hydrological process in the central valley basin of Ethiopia, from 1985 to 2018 and evaluate historical land use/land cover change using satellite image. Satellite images were classified by supervised classification technique with maximum likelihood. SWAT model were used to simulate hydrological processes in the watershed. The result...

Author(s): Ashenafi Nigusie and Mihret Dananto  

Flood frequency analysis of River Niger at Lokoja, Kogi State using Log-Pearson Type III distribution

January 2021

This study applied Log-Pearson Type III probability distribution to model time series annual peak flow records of River Niger recorded at Lokoja gauging station. This was necessitated by the need to provide reliable data for safe and economic hydrologic design for security of lives and property at downstream of river Niger basin. Though several methods have been adopted in the study area for flood mitigation, however,...

Author(s): Ahuchaogu Udo E., Ojinnaka O. C., Njoku R. N. and Baywood C. N.  

Statistical downscaling (Delta method) of precipitation and temperature for Bilate watershed, Ethiopia

January 2021

It is important to investigate potential changes in temperature and precipitation for assessing the impacts of future climate change on agricultural production for specific regions. In this study, climate scenarios of precipitation and temperature for the bilate watershed were generated. Statistical downscaling techniques of the Delta method analysis protocol of the Agricultural Intercomparison and Improvement...

Author(s): Getahun Garedew Wodaje, Zewdu Eshetu Asfaw and Mekuria Argaw Denboba  

Raw, activated and modified biosorbents for the speciation of C. I. acid red 2 from aqueous solutions: An adsorption study

January 2021

Adsorptive removal of C. I. Acid Red 2 dye in the aqueous solution has been carried out on the various surfaces. This study describes the comparative adsorption of dye using mustard cakes (MC), sugarcane bagasse ash (SBA) and leaves of water hyacinth (WH) in different forms. The effects of initial adsorbate concentration, contact time, adsorbent dosage, temperature and pH of the medium on the adsorption of C. I. Acid...

Author(s): Richa Sharma, Soami P. Satsangee, Sudhir K. Verma  

Dynamics of microbial communities in co-digestion of water hyacinth (Eichhornia crassipes) with ruminal slaughterhouse waste under mesophilic conditions

November 2020

Co-digestion of water hyacinth (WH) (E. crassipes) with ruminal slaughterhouse waste (RSW) has the potential for improving biogas production by complementing process parameters. This study evaluated microbial communities in co-digestion of WH with RSW at 32ËšC by isolation, phenotype analysis, DNA extraction and PCR amplification of the 16S rRNA genes. Digestion of WH and RSW separately exhibited lag times of 5 to 20...

Author(s): Omondi E. A., P. K. Ndiba, P. Gikuma-Njuru and D. Abuga  

Estimation of Mg, Cd, and Ni levels in urban waterfront using one-dimensional transport model

October 2020

Accurate quantification of heavy metals is essential for optimizing remedial efforts at polluted waterfronts. Although surface water quality models can be helpful tools for rapid quantification of heavy metals in streams, they cannot be extrapolated to other water bodies. This study estimated Mg, Cd, and Ni levels in one of the polluted urban waterfronts in the Niger Delta Province, Nigeria (5.317°N, 6.467°E)...

Author(s): Asinyetogha H. Igoni, Tuebi B. Tegu, , and Reuben N. Okparanma  

The need for integrated flood management approach from social, economic and environmental perspectives: The case of Upper Awash River Basin

September 2020

Flooding has been a critical problem in our globe causing huge damage on human lives as well as socio-economic and environmental assets. The upper Awash river basin in Ethiopia, which is the target of this study, is one such region that is affected by recurrent flooding. Thus, there is a need to develop appropriate and sustainable management mechanisms to mitigate flood impacts. An integrated flood management approach...

Author(s): Addisalem Bitew Mitiku, Berhanu Woldyohanes, Sharew Anteneh Mekonnen, Kirubeal Mekonnen and Abel Tadesse  

Influence of bed roughness on near-bed turbulent flow characteristics

July 2020

Influence of bed roughness on near-bed flow characteristics is of considerable importance, especially in turbulent flows over rough beds. This experimental study is devoted to insight various turbulent flow characteristics such as velocity distributions, Reynolds shear stresses (RSS) and velocity power spectra at the groove, lee and crest level of carrier fluid in an immobile gravel bed stream. Uniform round shape...

Author(s): Ratul Das and  Sinan Nizar  

Watershed delineation and morphometric analysis using remote sensing and GIS mapping techniques in Qena-Safaga-Bir Queh, Central Eastern Desert

May 2020

The development of drainage basins to raise aquifer potentiality is considering the major target in Qena-Safaga-Bir Queh (central Eastern Desert). It is attributed to drought, scarce groundwater resource, expansion of agriculture, growth population, infrastructures, and civilization. Geological, hydrogeological, and morphometric information is used to prepare the drainage development plan and strategy. The morphometric...

Author(s): Mohamed ElKashouty,  

Probability functions of road failures in a typical basement complex region, South-western Nigeria: A case study of Akure - Oba Ile Airport Road

April 2020

In this study, effort has been made to achieve a comprehensive geophysical investigation on immediate and remote causes of structural/foundation failures, specifically highway(s) within the southwestern basement complex region of Nigeria. Geophysical survey involves the use of Very Low Frequency Electromagnetic method (VLF-EM) which was complemented with electrical resistivity method using two techniques; 2D Electrical...

Author(s): Oyedele Akintunde Akinola, Bawallah Musa Adesola, Ozegin Kesyton Oyamenda, Ilugbo Stephen Olubusola, Ajayi Christopher Ayodele and Aigbedion Isaac  

Post drilling investigation for prolific groundwater aquifer using geoelectric logging at Nigeria LNG base, Port Harcourt

March 2020

Post-drilling investigation for prolific groundwater aquifer was conducted in a well at the Nigeria LNG Base, Port Harcourt using geoelectric logging. Resistivity (Short Normal and Long Normal) and Self-Potential (SP) logs were employed. Two zones (A and B) were tested to determine the porosity (ɸ), permeability (k) and the total dissolved solids (TDS) in the aquifer. Results show that the inferred lithology in the...

Author(s): G. I. Alaminiokuma and T. Warmate  

Estimate of bed load transport and scour depth in Kwadna watershed in Minna, Niger State, Nigeria

November 2019

Knowledge of sediment transport has been used to determine whether erosion or deposition will occur beneath the hydraulic structures, especially the magnitude of this erosion or deposition, and the time and distance over which it will occur. This paper, utilizes the stream gauging by wading method in estimating the bed load transport and scour depth in Kwadna Basin. The estimate of bed load transport enhances the...

Author(s): Adesiji A. R., Gbadebo O. A., Musa J. J., Asogwa E. O., Odekunle M. O. and Mangey J. A.  

Spatial and temporal fluctuation of groundwater depth in Amibara, middle Awash, Ethiopia

November 2019

Soil salinity is a  threat  for agriculture under irrigation as it affects the growth and development of plants and the problem is widespread in middle Awash where Amibara irrigated farms are present. Therefore, Measurements of groundwater depth were taken from thirty piezometers in the months of August, September, October, November and December to investigate spatial variability and temporal fluctuation of...

Author(s): Lemma Mamo, Bobe Bedadi and Solomon Tamiru  

Geographic Information System (GIS) based soil loss estimation using Universal Soil Loss Equation Model (USLE) for soil conservation planning in Karesa Watershed, Dawuro Zone, South West Ethiopia

October 2019

Soil erosion is the most challenging and continuous environmental problems resulting in both on-site and off-site effects in the world particularly in Ethiopia. Karesa watershed is one of the most erosion-prone watersheds which received little soil conservation attention. This study was conducted to estimate average annual soil loss rate using Geographic Information System and Universal Soil Loss Equation Model adapted...

Author(s): Bagegnehu Bekele, Alemayehu Muluneh and Nigatu Wondrade  

Enhancing the adsorption of Pb(II) and Fe(II) in the reactor by the thermally treated alluvial clay from Far North Cameroon

August 2019

The objective of this work was to investigate the influence of the thermal treatment of alluvial clay on the ad-sorption capacity of Pb(II) and Fe(II) to reduce clogging during adsorption phenomenon. The chemical,  X- ray  diffraction  (XRD),  Fourier  transform  infrared  spectroscopy  (FTIR),  scanning  electron microscope (SEM) and transmission electron microscopy...

Author(s): Adjia Zangué H., Nga B., Kamga R., Villiéras F. and Ebio Nko’o G.  

Evaluation of the current water quality of Lake Hawassa, Ethiopia

July 2019

The research aimed to evaluate the current wáter quality of Lake Hawassa in order to identify potential pollution sources and suggest appropriate measures. Physico-chemical water quality parameters have been determined by taking duplicate samples from seven sampling sites and the results were compared with WHO and FAO standards. The findings of the study revealed that the concentration of metals such as manganese...

Author(s): Haile Melaku Zigde and Mohammed Endale Tsegaye  

Finite difference method to design sustainable infiltration based stormwater management system

July 2019

Infiltration based stormwater best management practices bring considerable economic, social and ecological benefits. Controlling stormwater quantity and quality are primarily important to prevent urban flooding and minimizing loads of pollutants to the receiving waters. However, there have been growing concerns about how the traditional design approach contributes to the failure of infiltration based BMP’s that...

Author(s): Thewodros K. Geberemariam

Evaluation of sand-dam water quality and its suitability for domestic use in arid and semi-arid environments: A case study of Kitui-West Sub-County, Kenya

June 2019

Sand dams are one of the most successful rainwater harvesting methods, adopted in most of arid and semi-arid lands (ASALs) of Kenya to secure domestic water supply and micro-irrigation. Their ability to maintain acceptable water quality, under extreme climatic conditions of recurrent drought and floods, is therefore of paramount public health concern as various pollutants find easily their way into them. This study...

Author(s): Ndekezi Moïse, James W. Kaluli and Patrick G. Home  

Prototype of a control system for trickle irrigation systems considering distributors’ flow rate variation

May 2019

A prototype of a real-time closed loop automatic control system has been successfully developed to suit trickle irrigation systems management. The control system was designed to manage the irrigation system based on collecting data through soil moisture sensors located at three different locations acting each third of the lateral to put the effect of emitters’ flow rate variation along laterals on soil moisture...

Author(s): Elnemr Moataz  

Efficiency of empirical methods for reference evapotranspiration estimation in the district of Vilankulo, Mozambique

April 2019

Precise quantification of reference evapotranspiration (ETo) is crucial for calculating crop water demand. Eight empirical methods based on temperature and six on solar radiation were evaluated against Penman-Monteith FAO 56 method based on: Mean Bias Error (MBE), Root Mean Square Error (RMSE), Willmott coefficient (“d”), determination coefficient (R2) and the Student’s t-test. The meteorological data...

Author(s): Bartolomeu Félix Tangune and Catine António Chimene  

Design, fabrication and evaluation of bio-digester for generating bio-gas and bio-fertiliser for Auchi polytechnic demonstration farm

April 2019

A 4000 L bio-digester was designed and fabricated using 5 mm mild steel plate with the main purpose of generating biogas and bio-fertiliser for Auchi Polytechnic Demonstration Farm. To achieve this, a varying ratio of 1.155 m3: 2.310 m3 mixtures of cow dung and water were anaerobically digested in the batch digester. The experiment lasted for 33 days during which the quantity of gas generated were evaluated. The volume...

Author(s): Onuoha S. N., Unuigbe O. M., Suleiman I. A., Chukuwendu U. M. and Ogie-Aitsabokhai L.Y.  

Comparative study of physico-chemical parameters with national and international standard and the insect community of Erelu Reservoir in Oyo town, Oyo State, Nigeria

March 2019

Assessment of water bodies is very crucial to determine its quality and proffer solution before it has an adverse impact on its biota and direct users of the water body. Insect communities and physico-chemical parameters in comparison with national and international criteria of Erelu Reservoir were investigated to determine their impacts on insect community of the reservoir. Water and insect macro-invertebrates sampling...

Author(s): Popoola K. O. K, Sowunmi A. A. and Amusat A.I.  

Detection of hydrological impacts of climate change in Benin by a multifractal approach

February 2019

This study analyzed the hydrological impacts of climate change over Bénin synoptic stations from 1951 to 2010 using multifractal approach. This method is based on the study of temporal evolution of fractal dimension (D_f), multifractality index (α), co-dimension (C_1) and probable maximum singularity (γ_s). The comparison of the average values of yearly fractal dimension ((D_f)) Ì… obtained over the...

Author(s): Medard Agbazo, Gabin Koto N’Gobi, Eric Alamou, Basile Kounouhewa and Abel Afouda  

Assessment of water resources management and past works on water points development in Borana Rangelands, Southern Oromia, Ethiopia

February 2019

Water is the principal resource for all living to prosper but a major limiting factor when mismanaged. The wide spread clearing of trees has caused soil erosion that is resulting silt accumulation in the reservoirs 40 to 50% /year. Purposive selection techniques have deployed for this study to gather information.  Borana community has been managing water and pasture using its customary institutions called...

Author(s): Demisachew Tadele and Abiyot Lelisa

Preference for water boreholes to odor stream harnessing at Amaopkara

February 2019

The paper focuses on provision of sustainable portable water to Amaokpara community in Orumba Local Government Area of Anambra State, using “Decision Tree Analysis” which involves two options of water boreholes and odor stream harnessing. This is to achieve one of the key targets of millennium development goals by 2015, which is aimed at the proportion of people without sustainable access to safe drinking...

Author(s): Victor I. Otti and Ezenwaji E. E.  

Tannery wastewater treatment using two-stage anaerobic sequence batch reactor (ASBR) at mesophilic and thermophilic phase

January 2019

Industrialization has resulted in the formation of huge amount of waste products, which are released into the environment in the form of wastewater leading to environmental pollution and deterioration. Tannery effluent is among one of the dangerous pollutants of the industry. Most of the leather industries in Ethiopia discharge their effluent partially or without any treatment to the nearby water bodies. This creates a...

Author(s): Messay Emana and Mekibib Dawita  

Effect of first watering month on water requirement of sugarcane using CROPWAT Model in Finchaa Valley, Ethiopia

January 2019

This study investigates the optimum water requirements of Sugarcane planted in different months under rainfall and irrigation management, using CROPWAT model at Finchaa Valley in view of the importance of efficient water use as a key to grow crops and satisfy water demand. Analysis of soil physical properties was performed following the standard field and laboratories procedures and methods. The result of investigation...

Author(s): Chala Daba Geleta

Potential contaminant runoff from California’s dairy concentrated animal feeding operations (CAFOs): A geospatial analysis

January 2019

Concentrated animal feeding operations (CAFOs) contain large quantities of dairy cows and therefore have the potential to contribute significant amounts of harmful waste products to the environment. Although previous studies have used geospatial tools to assess potential contaminant runoff, the results from these studies are dependent on the unique geographical characteristics of specific regions. This study...

Author(s): Sunghoon Baek and Charlotte D. Smith  

Performance evaluation and economic analysis of solar photo-voltaic water pumping systems: Case of Abakore borehole water supply system in Kenya

September 2018

A solar photovoltaic (PV) water pumping system was investigated to determine performance and economic viability. An in-built data logger was used to collect real time data on key performance parameters. Performance indicators were defined and determined, while economic viability was analyzed using life-cycle cost (LCC) method and these costs were compared with a diesel generator pumping system. Solar irradiance varied...

Author(s): James Origa Otieno, Christian Thine Omuto and Antony Ayub Gitau  

Evaluation of canal water conveyance and on-farm water application for a small-scale irrigation scheme in Ethiopia

September 2018

This study was conducted to identify and understand the current level of canal water conveyance and on-farm water application efficiency of Lemchek-Sewur small-scale irrigation scheme in Ethiopia. The water conveyance efficiency of canals was determined by estimating discharge at different segments. On-farm water application efficiency was evaluated from the amount of water actually applied and from soil moisture...

Author(s): Alebachew Shumye and Ing Pratap Singh  

Quantifying the impact of integrated watershed management on groundwater availability in Gerduba watershed, Yabello district, Ethiopia

August 2018

Integrated watershed management has a positive impact on groundwater balance. However, most parts of the study area particularly, Borana is the one which is suffering from severe rangeland degradation. Among others, heavy grazing, bush encroachment, gully expansion, topsoil fertility loss, sedimentation and less adequate water availability account for the greatest noticeable rangeland degradation phenomena. Due to...

Author(s): Demisachew Tadele and Mihret Dananto  

The effect of variation of dimensions of solar reflectors on solar enhanced model pond

August 2018

Waste water stabilization pond is a simple way of treating waste water but one of its limitations is that it requires large area of land to be efficient. This study employed the use of solar reflectors to improve the efficiency of waste water stabilization pond by investigating the effect of variation of solar reflectors on the physical, chemical and biological properties of the pond. To achieve this, three model ponds...

Author(s): Onuchukwu O. J. C., Agunwamba J. C. and Shimbayev M. A.  

Towards equity in water pricing in small water systems: An Alberta case study

July 2018

Small water systems have water technology that has a higher cost structure than those of large cities. Consequently they cannot enjoy “comparable” consumption patterns. It is shown that full cost pricing is not compatible with achieving equity for small system residents and marginal cost pricing would not cover the capital costs. Therefore, provinces could seek legal recourse for higher federal transfers,...

Author(s): Gopal Achari , Mohammed H. I. Dore and Aaron Janzen    

Effect of climate variability on the yield of crops in Ondo State, Nigeria

June 2018

Climate change influences crop yield vis-à-vis crop production to a greater extent in countries like Nigeria where agriculture depends largely on natural circumstances. This study assesses the effect of observed climatic variables (rainfall, temperature and relative humidity) on yield of major crops which are divided into two groups, tuber crops (cassava and yam) and fruits (pepper and tomatoes) in Ondo State...

Author(s): Obafemi O. Olubanjo and Adebolu E. Alade

Reference evapotranspiration in São Paulo State: Empirical methods and machine learning techniques

May 2018

Reference evapotranspiration (ETo) is a key factor for water management and irrigation scheduling. In this paper, eight empirical methods, including four temperature-based (Benevides-Lopez, Hamon, Blaney-Criddle Original and Hargreaves-Samani: HS), four radiation-based (Abtew: AB, Jensen and Haise, Makkink and Irmak) and machine learning techniques (MLT) were tested against Penman Monteith FAO 56 method. The MLT...

Author(s): Bartolomeu Félix Tangune and João Francisco Escobedo

Wastewater treatment strategies of selected Zimbabwean food industries

May 2018

This survey aimed at identifying the current practices and experiences of industrial wastewater treatment in Zimbabwe. In this study, questionnaires were used to assess various companies located in Gweru Kwekwe, Bulawayo and Harare. The information collected identified a gap in the treatment of wastewater from food processing industries in Zimbabwe. Current results indicate that about 86% of the food processing...

Author(s): Manhokwe, S., Zvidzai, C., Mareesa, W. and Marume, P.

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