Although this article is a year old, we are posting it because it gives a good background with helpful graphics about how Israel uses water to make Palestinians' lives as difficult as possible.
"By building on the myth of a water-scarce region - Ramallah has more rainfall than London - Israel has deliberately denied Palestinians control over their water resources and successfully set the ground for water domination, granting itself a further tool to exercise its hegemony over the occupied population and territory." Read more here...