The attenuation of the natural disasters supposes the reduction of the vulnerability concerning human lives, goods and activities. The objective is to inform the public on the nature, the consequences of the disasters on the man, the natural habitat and agricultural of the basin of the Lake Kivu of 2011 - 2013. It is beforehand about identifying the factors of vulnerability, of measures the range of it and to localize in the space the most sensitive sectors. The level of appreciation of the factors will make itself by free observation by one visit of the Neuman sites, (2011). Through a transverse walk (transect walk) for the identification of the different environmental problems, Dery and al., (1999). This method is going to permit to know the major environmental problems in the zones of intervention.
The analysis of the landscape can serve to value human actions on soil in the Lwiro region. The approach of the indicators bound to the management of soil in the region is not well stocked enough. These criteria had been verified by the direct observation of the intervention sites in relation with geology by simple and open questions to people of the village met for enlightenments on the state of soil by a transverse walk. The species indicator of infertile soil represents a negligible percentage (Imperate cylindrica 0,5% Guizotia scabra 0,6% Tagetes minuta 0,8% Rhychelytrum repent 1%) except Conyza sumantrensis 5%, Crassocephalum vitellinum 3%. broadly speaking the indicators bound to the management of soil in the region of Lwiro are represented better in Byalumba that in Muganzo and Tshibati. the agriculturists provide an effort to palliate to the difficulties bound to the management of the fields. The depth of soil is big in Byalumba 54cm follow-up of Muganzo 40cm and Tshibati, 38cm.
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