Meitar Forest is just a short walk north of my home in Meitar.
See the parallel ridges in this late-afternoon photo?
Keren Kayemet (KKL)/Jewish National Fund (JNF), which is creating this and other forests in the northern Negev, explains it:
The tree planting method is called savannization, and it is based on harvesting desert floodwater.Terraces, furrows and ridges halt the rainwater and prevent it from running off.This method causes most of the water to be absorbed and stored in the earth, deep enough not to evaporate and close enough to the surface to be utilized by the vegetation.
Kakal (KKL) has some nice short videos about savannization on YouTube.
(Linking to Our World Tuesday.)