This study was undertaken in the Irhambi/Katana grouping. The purpose is to inventory sources for to determine the flow or theirs spatial distributions, to liberate the correlation between water quantity and household also presenting state source that is to say source hawk and not hawk also those dying up the grouping. The direct observation method and interview was used as a stopwatch and the global positioning system (GPS) for the geographic coordinates and the measurement of flow.
The results of this work demonstrate that geographically, sources are unevenly distributed across the grouping. From a quantities point of view most of sources in Irhambi/Katana produces little water. And according to altitude, the finding is that there are fewer sources upstream (high altitude) and more sources downstream, the shores of lakes –Kivu.
Water supply sources are very affected by seasonal variation of their flow during the year and this explains occasionally the use of water stream and Water Lake in spite of the latter condition that is polluted and therefore undesirable consumption.