![]() We then estimate water level maps and surface water storage (SWS) in floodplains, lakes, rivers and wetlands of the CRB, over the period 2003-2007, using a multi-satellite approach, which combines the GIEMS dataset with the water level measurements derived from the ENVISAT altimeter heights. At an interannual time scale, we show that SWE variability is influenced by ENSO and the Indian Ocean dipole events. ![]() Analyzing the Global Inundation Extent Multi-Satellite (GIEMS) time series, we first show that surface water extent (SWE) exhibits marked seasonal patterns, well distributed along the major rivers and their tributaries, and with two annual maxima located: i) in the lakes region of the Lwalaba sub- basin and ii) in the "Cuvette Centrale", including Tumba and Mai-Ndombe Lakes. In this context, remote sensing observations provide a unique opportunity to better characterize those dynamics. In the Congo River Basin (CRB), due to the lack of contemporary in situ observations, there is a limited understanding of the large-scale variability of its present-day hydrologic components and their link with climate. Satellite-based estimates of surface water dynamics in the Congo River Basinīecker, M. In these tropical rainforests live people of several cultures whose lives and livelihoods are. Forests of this region have been called Earth's "second lung" (after the Amazon Basin forests) and harbor an immense diversity of invertebrates. One of the entomologically richest, yet least studied, regions of Africa is the interior Congo River Basin. The ecological and cultural functions of invertebrates in the Congo River basin. Moreover that wakes also the project of junction by a canal of the Congo and Chari basins for fighting against the hydrological decline of Lake Chad. For the Congo basin, the situation is worrying because that affects the inland waterway transport. This phenomenon was emphasized especially these last years and is founded in others rivers of Central Africa, where it reflects the variations of de rainfall patterns and the surfaces features. Within the bi-modal hydrological regimes of Sangha and Congo river, because they are equatorial, we also observe since many years a small decline of the secondary flood of april-june. For Ubangui and Sangha, the flows remain weaker since 1970. However, a return to normal conditions is recorded from 1995. For Congo River, in comparison with its secular average, after an excess flow noted during the sixties, a significant drop of 10% occurs in the eighties. ![]() In the absence of long, reliable and available flow series in the whole Congo basin of 3,8 106km2 area, the present study concerns only the Congo River at Brazzaville/Kinshasa and two of the main tributaries of its right bank, Ubangui at Bangui and Sangha at Ouesso, with hydrologic data available from the first half of the 20th century. As in West Africa, 1970 was the year of the major hydroclimatic event announcing a weaker flowing period. The last studies concerning some main Congo basin rivers allowed to subdivide their multi-annual flows into several homogeneous phases. Hydrological trends in Congo basin (Central Africa) ![]()
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