The published article is one of the products of the EU-WADE project in Namibia. It summarizes the impact of extreme floods on pulsating vegetation growth and drying along, the Kuiseb River, a quite long, transmitting ephemeral stream that crosses the Namib desert. The impact is detected at-a-station and then remote sensing is used to show this pulsation along the dry river. The large floods maintain a quite green lavish oasis along the river, but in a downstream direction, this, and several other streams that cross the Namib, are maintained only by the rare and extreme floods and therefore are recognized by vegetation indices from remote sensing. This work was led by a group from the Institute of Earth Sciences (Hebrew University), assisted by other colleagues, and by the newest recruit to the Dept. of Soil and Water Sciences (Faculty of Agriculture), Dr. David Helman.