Malicki Zorom

• Institut International d'ingénierie de l'eau et de l'environnement

In most situations where entities interact by sharing limited resources, controlling population density is crucial for maintaining ecosystem sustainability. Mathematical models have been widely used to explain systems arising from the interaction between populations and nature, particularly regarding resource utilization. The objective of our work...

In borehole siting within the basement rock aquifers of West Africa, lineament analysis has traditionally been the primary hydrogeological target, where lineaments may indicate the presence of deep geological structures. However, the limited success of groundwater borehole drilling projects suggests limitations to this approach, calling for a reass...

In this article, we present a mathematical model for the transmission of HIV with the compartment of individuals in remission and vertical transmission describing the dynamics of the spread of the HIV/AIDS epidemic in a community. In the mathematical analysis of the model, we compute the basic reproduction number R0 and study the existence and stab...

This study investigates the vulnerability of Burkina Faso to climate change, focusing on rain-fed agriculture, which is crucial for many African nations. Burkina Faso’s heavy reliance on climate-dependent livelihoods, along with the presence of armed terrorist organizations in the Sahel, heightens its vulnerability. There is limited knowledge about...

Ouagadougou, the capital city of Burkina Faso, is facing significant economic and social damages due to recurring floods. This study aimed to develop a flood susceptibility map for Ouagadougou using a logistic regression (LR) model and 14 flood conditioning factors, including elevation, slope, aspect, profile curvature, plan curvature, topographic...

Supplemental irrigation based on runoff harvesting is a sustainable solution in the current context of water scarcity that is prevalent in Sahelian countries. Runoff water harvesting ponds (RWHPs) are increasingly being utilized for vegetable cultivation by producers. This study aims to analyze the cropping choices of producers benefiting from RWHP...

Waste electrical and electronic equipment (WEEE) is defined as “urban mines” due to the various recoverable minerals they contain. However, current WEEE classification methods are mostly limited to their physical characteristics, focusing on collection, transport, and treatment purposes rather than on valorization. In the present study, our aim is...

The review discusses the advancements in vermifiltration research over the last decade, focusing on pollution removal mechanisms, system performance, the fate of filter components, and by-products. Vermifiltration has demonstrated remarkable capabilities, particularly in treating highly contaminated wastewater with Chemical Oxygen Demand (COD) leve...

Obtaining accurate values of saturated hydraulic conductivity (Ksat) is very important for managing all natural or artificial processes involving water flow into soils. Double-ring infiltration (DRI) is one of the easiest-to-work-with techniques commonly used for Ksat determination. Unfortunately, when improperly used, it leads to important variati...

Since the droughts of the 1970s–1980s, populations in the Sahel region have opted for a mass exodus to more humid urban or rural centers. Migrations or exoduses have accelerated in recent decades due to environmental degradation and unfavorable climatic conditions. Insufficient harvests are the main reason for migration for the majority of migrants...

Specific consumption is a key parameter in estimating the water demand and further optimising the sizing of Drinking Water Supply Systems (DWSS) infrastructure. DWSS are globally used to provide safe drinking water in urban and rural settings, and their design cost is critical for water authorities, especially in low-income countries. In this study...

One of the first environmental crises to attract interest in development initiatives and aid was the great drought of the 1970s in the Sahel. This study investigates the extent of damage caused by natural disasters from one of the most widely used databases—EM-DAT—with a sample size of 16 Sahelian countries over the period 1960–2020. These countrie...

The increase in violence has created an unprecedented crisis in the Sahel, particularly the Central Sahel, with massive displacement of populations already vulnerable to climatic hazards. This paper aims to propose a mathematical model of the ordinary differential equation system that will reflect the dynamics of terrorism and internal displacement...

The increase in violence has created an unprecedented crisis in the Sahel, particularly the Central Sahel, with massive displacement of populations already vulnerable to climatic hazards. This paper aims to propose a mathematical model of the ordinary differential equation system that will reflect the dynamics of terrorism and internal displacement...

The increase in violence has created an unprecedented crisis in the Sahel, particularly the Central Sahel, with massive displacement of populations already vulnerable to climatic hazards. This paper aims to propose a mathematical model of the ordinary differential equation system that will reflect the dynamics of terrorism and internal displacement...

The dry spells are severe obstacles to rainfed agriculture in Sahelian countries. The farmers believe supplemental irrigation is an excellent way to adapt rainfed agriculture to dry spells. In this study, we analyzed the contribution of supplemental irrigation to food security and compared the profitability of different types of ponds constructed b...

Background Dry spells are serious obstacles to rainfed agriculture in Sahelian countries. Various water harvesting techniques are used by farmers to reduce the impact of climate variability, but are not sufficient in the case of a prolonged drought lasting 2–3 weeks. The farmers believe supplemental irrigation is a good way to adapt rainfed agricul...

L'objectif de ce travail est d'étudier les effets positifs du polyacrylate de potassium sur la diversité floristique herbacée à Ouagadougou (Burkina Faso). Pour la conduite de l'étude, un protocole expérimental composé de 24 répétitions réparties en deux essais de 12 bacs chacun a été mis en place. Les bacs des deux essais, 1 et 2, contiennent chac...

The main objective of this paper is to address the following question : are the containment measures imposed by most of the world governments effective and sufficient to stop the epidemic of COVID-19 beyond the lock-down period? In this paper we propose a mathematical model which allows to investigate and analyze this problem. We show by means of t...

We extend an ordinary differential equation (ODE) model for the meningococcal meningitis disease to a partial differential equation (PDE). This extension istwofold: (i) consideration of two modes of contamination, namely through a direct transmission (human to human) and an indirect transmission (via free‐living bacteria). (ii) consideration of the...

Ex ante evaluation of supplemental irrigation in a Sahelian context: coupling biophysical and economic models. Description of the subject. In Sahelian countries, irregular spatial and temporal rainfall distribution remains a threat for rainfed agriculture despite the use of a wide range of techniques for soil conservation. Objectives. To analyze se...

Policy makers need to predict the socio-economic vulnerability of their populations to climate change. The method proposed in this paper links the outputs of five regional climate models (CCLM, HadRM3P, RACMO, RCA and REMO) to a compartmental model. The method was applied to a representative village in the Sahelian region of Burkina Faso. The integ...

This study highlights the perception and the option value of climate information in the sahelian and sudano-sahelian agro-climatic zones of Burkina Faso. From the sampled farmers only 21.78% have access to climate information, while 93% of them need climate information to guide through their decision in planning agricultural activities. Option valu...

This study analyzes farmers' practices and willingness to adopt supplemental irrigation on rainfed crops in the Sahelian and Sudano-Sahelian areas of Burkina Faso. A survey of 629 farmers revealed a diversity of farming practices within and between two agro-climatic zones. Over 65% of farmers believe that supplemental irrigation is a good way to mi...

This study highlights the perception and the option value of climate information in the sahelian and sudano-sahelian agro-climatic zones of Burkina Faso. It shows that the climate information is asymmetrically distributed to a minority (21.78 %) of the sampled farmers. The analysis reveals that the majority (93%) of the farmers need climate informa...

We update the recent rainfall evolution in Senegal.We highlight different changepoints showing the necessity to integrate recent period.Detecting changepoints increases assumption about the return to a wetter climate.Improving the analysis of rainfall contributes to a better awareness of land use.

Sahelian farmers tend to diversify their activities to reduce their vulnerability to external shocks. It is important to distinguish between farmers’ types response to these shocks as well as to policy incentives. To develop a typology of farmer adaptation strategies, evaluate the level of vulnerability and assess perceptions of policies, two detai...

We propose a metapopulation model for malaria with two control variables, treatment and prevention, distributed between n different patches (localities). Malaria spreads between these localities through human travel. We used the theory of optimal control and applied a mathematical model for three connected patches. From previous studies with the sa...

Rural development in the Sudano-Sahelian region during the past 20 years and future scenarios of change were studied using meta-analysis of case studies, household interviews and scenario assessment. Households have generally increased their wealth, especially when they diversify out of agriculture. Rain-fed crop cultivation is more sensitive to cl...

The Sudano-Sahelian zone of West Africa has experienced recurrent droughts since the mid-1970s and today there is considerable concern for how this region will be able to adapt to future climate change. To develop well targeted adaptation strategies, the relative importance of climate factors as drivers of land use and livelihood change need to be...

Coping strategies are generally based on financial resources, human capital for labour, quality of soils, rainfall and knowledge of the environment, but there is no single model of adaptation. This study develops a typology of adaptation strategies based on economic data collected in five Sahelian countries (Burkina Faso, Mali, Niger, Nigeria and S...

Depuis les sécheresses des années 1980, les populations du Sahel ont choisi un exode massif vers les centres urbains et les zones humides. Ces déplacements (migrations et exode) se sont accélérés au cours de ces dernières décennies en raison de la dégradation de l’environnement et des conditions climatiques défavorables. L’insuffisance des récoltes...

The Sudano-Sahelian zone of West Africa has experienced recurrent droughts since the mid-1970s and today there is considerable concern for how this region will be able to adapt to future climate change. To develop well targeted adaptation strategies, the relative importance of climate factors as drivers of land use and livelihood change need to be...

In this study, the authors investigate farmers' vulnerability to climate variability and evaluate local adoption of technology and farmers' perceptions of adaptation strategies to rainfall variability and policies. A survey was conducted in a community in northern Burkina Faso following the crop failure of 2004. In 2006, following a better harvest,...