This work on the impact of pollution of Lake Kivu waters on its biodiversity by considering the section of the Independence Square - Kazingo Bukavu led us to make a finding on the decrease in the quantity and quality of fish, as a consequence direct pollution of Lake waters with negative impact on its biodiversity. This pollution of Lake Kivu by streams and rivers results from industry and household waste. Industrial waste is channeled there and households use streams and rivers as a dump. The waters of the Kawa River that cross the entire Greater Kadutu Commune from the West to the East are highly polluted and are of no use without serious treatment beforehand. The most polluted points are downstream of industrial wastewater discharges and all along rivers and streams where all forms of spilled waste end up in Lake Kivu. This water pollution causes olfactory nuisance on a large part of the population who complains of water-related diseases such as typhoid fever, cholera, etc. People settled in the bed of rivers and streams are well aware of floods by the waters that return to their natural bed in the rainy season. These floods are indeed true sources of contaminations because of their high level of pollution. The creation of an Integrated Watershed Management Committee and the construction of a waste treatment plant bringing together all the watershed stakeholders around a table for information and awareness raising for change in behavior, could reduce the flow of waste dumped in Lake Kivu.

The exploration of the Central sedimentary basin in Democratic Republic of Congo, focused on geological, geochemical and geophysical studies, as well as well drilling, started early in nineteen fifty with several foreign organizations including the Belgian firm REMINA. Coupled with field work carried out by the Congolese national oil company, this work resulted in the confirmation of the surface index at several sites, as well as the recognition of the potential mother rocks, reservoir rocks and cover rocks. In this work we contribute to the development of a geological model of the petroleum system of this sedimentary basin based on the interpretation of Bouguer anomalies. After analysis the results are represented in the form of maps. Apart from the surface index, mother rocks, reservoir rocks and cover rocks already confirmed in this area, these results have enabled the identification of places with large sediment thicknesses or central deposits and areas likely to trap hydrocarbons in this basin. Our model of this sedimentary basin allows to locate the maturation zones of the mother rocks, gives an idea of the direction of hydrocarbon migration, help identification and the location of the probable geological structures favourable to the accumulation of oil in this area.

The disaster wich occurred in Tchigoma (a village located at about 25km from the city of Bulambika) in the chiefdom of Bunyakiri was investigated. The disaster caused the death of 3 people and some of them just survived. The accident was caused by the exposure to the high concentration of two gases during the digging of a toilet pit. The following concentrations were recorded in the hole considered as the epicenter: the carbon dioxide (CO2) at 93.8% and the carbon monoxide CO at 2031 parts per million, using GA2000 equipment. Although the exact value of the lethal concentration for humans is uncertain, these recorded values are too high for mammals’ survival .The mortality caused by these gases is a function of the inhaled concentration and duration of exposure. From the observations on the site, we had concluded that the gas were generated the peat covered by the alluvium layer considered as a roof.

This study carried out in the cheap one of Bukavu, precisely in the southern part, on water of the sources. It was carried out under two aspects: aspects quantitative and qualitative. The first aspect consisted with the taking away of the flows on the various sources to compare them from/to each other. It was noted that the flows vary from a source to another: the Kabangere source is most significant, with an average of 29,87.10-5 m3/S, followed by Brigignon 10,89. 10-5 m3/S, Hewa Bora 8,93. 10-5 m3/S, Mushununu 7,75. 10-5 m3/S, Swimming pool 3,83. 10-5 m3/S and, finally, Kaba T ate 3,15. 10-5 m3 / S. L be five last sources have medium flows varying from 3,15 to 10,89.10-5 m3/S. the second aspect which was limited on the qualitative analysis consisted in measuring the contents of chemical elements dissouts in water of the sources to compare them with their relative concentrations recommended for a drinking water by the standards of WHO (World Organization of L has Santé) and supplemented by the measurement of the physicochemical parameters such as the pH, conductivity, the temperature. This study proved that water of our sources is all drinkable, and thus, clean and without danger to consumption.

In this study, we have established the relationship between the seasons and the rate of flow of the Congo river during two periods of observations, the first from 1990 to 1999 and the second period from 2000 to 2009. It was observed a pluviometrical increase form the first period to the second. This fact should be correlated to the climate change characterized by the dry and wet seasons associated with low water and flood periods, respectively. This climate change has a real impact on temperature which is increasing.

The impacts of climate change of Osse-Ossiomo River Basin in the South-West of Nigeria under different climatic Scenarios were investigated using information on rainfall - temperature for forty years (1961 - 2000). Discharge information of Osse and Ossiomo rivers was collected for the period from 1989 to 1994. A number of water resources development schemes including hydroelectric and water supply projects have been planned in the southwestern of the river system of Nigeria. Results revealed fluctuating rainfall pattern with great uncertainties in the mid-1980s. Temperature shows an increasing trend and the highest temperature of 37oC was obtained in 1998 during the 40-year period. There is a strong evidence of global warming using the index of temperature in the drainage basin. River discharge also indicated fluctuating trends from year to year in the decades with records. It was concluded that the river discharge pattern of Osse-Ossiomo River Basin exhibited similar behaviors as other drainage basins of the world. Climate change has impacted on the river discharge of Osse-Ossiomo. This has implication on water security, sanitation and health of the inhabitants in the river basin. Most people were forced to resort to various sources for the numerous uses of water. Statistical tests had shown that the changes in rainfall temperature and rainfall discharge were significant at the 5% level.

This study is showing different types of energy in D.R. Congo where hydraulic is most exploited followed timidly by solar energy. According from many power cut of energy in our country, others types of energy cannot be neglected. For each energy we have presented: the definitions, uses, inconvenient and environmental impacts. The cartography of these energies represented in a map for each province was very useful to their distribution. It was found a big disparity in the energies distribution, because of environmental factors in each provinces.

Since its accession to the independence, the Democratic Republic of Congo knew a succession of the disorders and wars with negative impacts on its economic tissue, its social and cultural development. The succession of wars which the R.D. Congo especially in its East part knew maintained a climate of insecurity in the National Park of Kahuzi-Biega and its periphery, more precisely in Health area of Cibumbiro in the health Zone of Miti-Murhesa and much more in its littoral part with the National Park of Kahuzi-Biega. The war of Rwanda and the massive arrival of the Rwandan refugees in RDC involved wars known as of "release", the creation of the militia and groups armed and conflicts between the ethnos Congolese Groups. This conflict generated many cases of plundering, rapes and massacres, which generated the disappearance of domestic fauna. Plundering themselves make lose 49 % of the domestic cattle and the fear of future plundering made the disappearance of its 51% ; such are the principal causes of the disappearance of domestic fauna in the health area of Cibumbiro.