| | Sample RIS -- United Republic of Tanzania, Lake Natron Basin, 2001 |
 | | Lake Natron is a soda lake of variable extent situated in the bottom of the Rift Valley basin (Gregory Rift) and surrounded by Rift Valley escarpments and volcanic mountains whereof the mountain of Oldonyo Lengai in the south is still active. |
 | | The bottom of the Lake Natron basin, which is situated at about 600m, comprises lagoons, soda flats and lakeshore environments such as springs, seasonal or permanent rivers and streams. |
 | | Lake Natron is situated in a closed basin and act as a sink for numerous seasonal and a few perennial streams and about 28 mainly saline springs; most water to the lake basin comes from rainfall, however, the arid conditions prevail due to a negative precipitation/evaporation balance. |
| www.ramsar.org /ris/ris_tanzania_natron.htm (3630 words) |