Author: Alida NADÈGE THIOMBIANOPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Variabilité Climatique Et Impacts Sur Les Ressources en Eau Au Burkina Faso
Author: Alida NADÈGE THIOMBIANORéduire la vulnérabilité de l'Afrique de l'Ouest aux impacts du climat sur les ressources en eau, les zones humides et la désertification
Author: Publisher: IUCN
ISBN: 2831707838
Category : Climatic changes
Languages : fr
Pages : 96
Book Description
Variabilité climatique et ressources en eau au Burkina Faso
Author: Alida Nadège ThiombianoPublisher: Presses Academiques Francophones
ISBN: 9783838176260
Category :
Languages : fr
Pages : 140
Book Description
Au Burkina Faso, la disponibilite des ressources en eau est aleatoire compte tenu principalement de la variabilite spatio-temporelle de facteurs climatiques. Etre en mesure d'organiser la gestion durable de ces ressources dans le contexte du changement climatique mondial actuel, assurerait donc un equilibre socio-economique. D'ou l'etude de cas du bassin versant draine par le fleuve Nakanbe. L'etude combine analyses statistiques descriptives de series chronologiques de donnees meteorologiques, et approche action-participative par le biais de l'analyse de perceptions sociales. Des tendances significatives ( =0,05) annuelles a la baisse pour la pluviometrie totale, et a la hausse pour la temperature de l'air aux stations de Ouahigouya et Ouagadougou, ont ete detectees a l'aide du test de Mann-Kendall. Quant aux perceptions des populations locales, elles font egalement ressortir une baisse et une irregularite des pluies, une augmentation de la chaleur et une diminution des mois frais. Les resultats de cette etude se veulent etre un outil additionnel pour tous les acteurs usagers et gestionnaires de la ressource en eau.
Changement climatique et cycle de l'eau
Author: Isabelle La JeunessePublisher: Tec & Doc Lavoisier
ISBN: 9782743020842
Category :
Languages : fr
Pages : 325
Book Description
Variabilité Des Ressources en Eau en Afrique Au XXème Siècle
Author: Eric ServatPublisher: IAHS Press
ISBN: 9781901502657
Category : Rain and rainfall
Languages : en
Pages : 476
Book Description
Climate Variability and Change
Author: Flow Regimes from International Experimental and Network Data (Project)Publisher:
ISBN: 9781901502787
Category : Business & Economics
Languages : en
Pages : 738
Book Description
This volume contains 117 reviewed papers from over 30 countries, published in English, French and Spanish, which reflect both international dimension of FRIEND and the key challenges facing hydrologists in the 21st century.
Changez
Author: Ger BergkampPublisher: IUCN
ISBN: 9782831707549
Category :
Languages : fr
Pages : 76
Book Description
Climate Change and Water Resources in Africa
Author: Salif DiopPublisher: Springer Nature
ISBN: 3030612252
Category : Technology & Engineering
Languages : en
Pages : 521
Book Description
The focus of this book is on the key water-related vulnerabilities to climate change in Africa, particularly in its most vulnerable areas, exploring potential management responses to such vulnerabilities. The African countries are particularly exposed and vulnerable to the negative impacts of climate change, with important impacts on water resources and hydrological systems, water availability, water resource management and sea level variations. Already, under various anthropogenic pressures, the status of water resources in Africa has been changing over the past decades, with decreasing water quality, falling groundwater levels, and variability in rainfall, both in terms of timing and intensity. Climate change will further accelerate the rate of change, affecting the ability of people and societies to respond in a timely manner. It is clear that there is no quick fix to the pressures imposed on water resources by climate change. Increasing the resilience of ecosystems and communities to extreme events such as flooding and drought, and integrating climate change risks and opportunities into development decision-making is indeed a key challenge, as much a technical climate-change one, as a political and developmental challenge. The book, in this regard, intends to contribute to the debate around climate change in relation to water resources management in Africa, and in particular inform policy decisions and actions that will improve governments’ and communities’ ability to manage the challenges of climate change and variability in relation to the aquatic ecosystems that they depend on. The knowledge collected in this book will benefit policy makers, researchers, as well as other stakeholders.
Caractérisation des saisons de pluies au Burkina Faso dans un contexte de changement climatique et évaluation des impacts hydrologiques sur le bassin du Nakanbé
Author: Boubacar IbrahimPublisher:
ISBN:
Category :
Languages : en
Pages : 236
Book Description
This study aims to a description of the variability in the rainfall regime over the West African Sahel and an assessment of the impacts of this variability on the water resources in the region from a set of some hydrological models. Although, many results of some studies on rainfall variability over Sahel during the last five decades (1961-2009) show a significant decrease in the annual rainfall amount since 1970. This rainfall deficit has entailed a severe hydric stress in the region. Burkina Faso, a sahelian country, is under this situation of continuous drought condition. So, to characterize the climate condition at the scale of Burkina Faso, we analyzed the rainfall data of the synoptic network through a discretization of the rainy seasons in several characteristics relative to the season period, rainfall frequency and intensity, and the dry spells. A computation of these characteristics from observed rainfall data and from simulated rainfall data of five regional climate models (CCLM, HadRM3P, RACMO, RCA et REMO) run under scenario A1B of IPCC, helped to assess the representativeness of the simulations over Burkina Faso. Indeed, the simulated rainfall data present high frequency of low rainfalls (between 0.1 mm/day and 5 mm/day), and some heavy maximum daily rainfall. However, an application of a correction procedure, quantile-quantile, to the simulated rainfall, significantly reduced the different biases and produced some rainfall data similar to the observations over the 1961-2009 period. An analysis of the future variability of rainfall regime over the prediction period of 2021-2050 in comparison to the reference period of 1971-2000 and from the five climate models presents different tendencies in the evolution of the annual rainfall amount: two models predict significant decrease in rainfall while two others predict a significant increase in the annual rainfall amount. These significant changes come from a decrease in rainfall frequency or an increase in rainfall intensity. However, two consensuses come out from the models: a decrease in the very low rainfall (0.1 à 5 mm/jr) and a lengthening of the mean dry spell. Also, four models show an increase in the very strong rainfall (>50 mm/day). On the other hand, the five models show an increasing trend in the potential evapotranspiration (PET) over the 1961-2050 period. The impacts of these changes in rainfall regime and the increase in the PET on the hydrological regime of the sahelian part of Nakanbé basin in Burkina Faso (upstream of the Wayen gauge) are assessed from two hydrological models, GR2M and ORCHIDEE. The GR2M, calibrated and validated for the basin over the 1978-1999 period, reproduced the hydrological balance of the basin during this period. But for ORCHIDEE, a repartition procedure was elaborated in order to distribute the simulated runoff into the discharges and infiltrations. So, an implementation of these hydrological models under the climate change conditions of rainfall decrease shows an hydrological constraint with a decrease in the runoff and the water table recharge, and an increase in the evaporation rate in the hydrological balance of the basin. However, the amplitude of the hydrological impacts depends on the type of the change in the main characteristics of the rainy season: in the rainfall frequency or in the rainfall intensity. So, a decrease in the rainfall intensity is more prejudicial to water resources availability with an important increase in the evaporation rate and an important decrease in the runoff and in the groundwater recharge.
Author: Mahaman Ouédraogo