Minimum and Maximum Temperature Trends in Congo-Brazzaville: 1932-2010

Samba, Gaston; Nganga, D.

doi:10.4236/acs.2014.43040

Cited by 9 publications

(8 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, 20% of catchments showed negative trends while 80% of catchments showed positive trends in their diurnal temperature range. Samba & Nganga 16 analyzed maximum and minimum temperatures time series of Congo-Brazzaville, where the temperatures series showed an irregular increase. Moreover, 5 reported that in future the whole Zambezi River Basin is expected to become hotter, drier and more variable, experiencing more prolonged drought periods and more extreme floods.…”

Section: Literature Reviewmentioning

confidence: 99%

Variability and trends of rainfall, precipitation and discharges over zambezi river basin, southern africa: review

Banze¹,

Guo²,

Shi³

2018

IJH

View full text Add to dashboard Cite

Variability and trends of rainfall, precipitation and discharges over zambezi river basin, southern africa: review Submit Manuscript | http://medcraveonline.com IntroductionHuman influence on the climate system is clear, and recent anthropogenic emissions of greenhouse gases are the highest in history. Their effects, together with those of other anthropogenic drivers, have been detected throughout the climate system and are extremely likely to have been the dominant cause of the observed warming since the mid-20th century. Recent climate changes have had widespread impacts on human and natural systems. Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia. 1 according to Res & Trenberth,2 there is a direct influence of global warming on precipitation. Increased heating leads to greater evaporation and thus surface drying, thereby increasing the intensity and duration of drought. The African continent has been identified as particularly vulnerable to the changing climate due to its envisaged low adaptive capacity and vulnerability and the southern African region is regarded as one of the most vulnerable regions in Africa.3 This affects the water resource in terms of quality and quantity of water.4 Africa is highly vulnerable to the impacts of climate change and numerous climate change models predict that the continent's weather patterns will become more variable, and extreme weather events are expected to be more frequent and severe, with increasing risk to health and life. 1,4,5 The droughts and floods will increase in their frequency leading to more water stress. Alterations in agricultural, livestock and fisheries productivity will occur and Africa will face further food insecurity as well as possibly the spread of water-related diseases.According to Swain et al.,6 Zambezi basin is already experiencing drastic changes to its climate. In recent years the annual rainfall in the region decreased considerably and affected the annual flow levels. Over 128 million inhabitants that are part of the Zambezi River Basin are dependent on this river directly or indirectly as a source of food and water. In total the countries along the Zambezi Basin have 2.17 million km 2 of agricultural land, of which just 202,900 km 2 is arable. But as a consequence of increased agricultural land, there is also an increased need for irrigation. The Intergovernmental Panel on Climate Change (IPCC) has categorized the Zambezi as the river basin exhibiting the "worst" potential effects of climate change among 11 major African basins. Over the next century, climate change is expected to increase this variability, and the vulnerability of the basin and its hydropower dams. 5 The Zambezi River Basin has one of the most variable climates of any major river basin in the world and the runoff is highly sensitive to variations in climate, as small changes in rainfall pattern produce large changes in runoff. The hydrology of the basin is very important for hydropo...

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Variability and trends of rainfall, precipitation and discharges over zambezi river basin, southern africa: review

Banze¹,

Guo²,

Shi³

2018

IJH

View full text Add to dashboard Cite

show abstract

“…The climate is tropical with a rainy season from October to May, and dry seasons between January-February and June-September. The annual rainfall oscillates among 1250 mm and 1350 mm/year [22]. The hydrogeological group is part of the Bateke's water table, with an area of 270 km 2 .…”

Section: Study Areamentioning

confidence: 99%

Prediction of the Strength Behaviour of the Sandy Soil by using Collapse Potential in the Kintele Site-Congo

Adolphe

Mbilou

Bissombolo

et al. 2022

AREES

View full text Add to dashboard Cite

This work aims to evaluate the water effect on the soils collapse potential. The laboratory tests based on the soils samples preparation determined the soils properties. Parameters such as water content, dry unit weight, degree of saturation, voids ratio and particles size distribution were determined. The collapse potential was analysed indirectly according to various researchers criteria. The results confirmed the high vulnerability of the study area to collapse. The oedometer tests determined the values of the collapse potential showing the conventional relationship between the collapse potential and the water content. It is noted that increasing water content leads to decrease soils strength to collapse, and the increasing progress of collapse poses a risk to constructions on silty sand. The collapse potential decreases with the increase in the relative density keeping the water content constant. This collapse potential caused by soil water content variation can be reduced from compaction.

show abstract

“…The study area has a tropical climate with a rainy season from October to May, and dry seasons between January-February and June-September. The annual fluctuation of rainfall is among 1250 mm and 1350 mm/year [18]. The hydrogeology is part of the Bateke's water table, with an area of 270 km 2 .…”

Section: Study Areamentioning

confidence: 99%

Stability Evaluation of Reinforced Slope Soil with Vetiver Grass against Erosion and Landslides Hazards by Using Finite Element Method

Noël

Adolphe²,

Harmel³

et al. 2022

IJPSS

View full text Add to dashboard Cite

This work studied slopes with different geometric situations. The purpose is to select types of soil for embankment construction to stabilise the site by using nearby accessible filling materials. Then, PLAXIS-2D software was used including five (6) phases of sequential calculation such as soil, structure, mesh generation, conditions of flow and construction stage and the use of Vetiver grass for embakment stability reinforcement. Choices were made on soil properties, loading, water table effect, embankment geometry and reinforcement actions of vetiver grass. The method is based on using diverse filling materials and varied slope gradients with different heights. So, the slope analyse involves homogeneous soils, in addition to slope section by various soils strata. Results obtained showed that the increase in soil shear strength is related to the mechanical effects of vetiver roots and make the soil able to resist shear stress due to the presence of roots density within the soil mass and the root tensile strength. It is also noticed that the soil suction effects and roots reinforcement increased the apparent cohesion of the soil, showing an important role played by vetiver grass in stabilising shallow-seated slopes failure with significant effect on slopes stability.

show abstract

Minimum and Maximum Temperature Trends in Congo-Brazzaville: 1932-2010

Cited by 9 publications

References 33 publications

Variability and trends of rainfall, precipitation and discharges over zambezi river basin, southern africa: review

Variability and trends of rainfall, precipitation and discharges over zambezi river basin, southern africa: review

Prediction of the Strength Behaviour of the Sandy Soil by using Collapse Potential in the Kintele Site-Congo

Stability Evaluation of Reinforced Slope Soil with Vetiver Grass against Erosion and Landslides Hazards by Using Finite Element Method

Contact Info

Product

Resources

About