Is the territory allocated to the Palestinians enough for a viable country?

The land is semi-aired. Water has always been a high priority item. Would a Palestinian state actually have enough? It is possible, for example, that a first world country would have enough while a third world country would not.

I suspect that part of what has driven Israel to expand its borders at every available opportunity is that what was allocated to Israel in 1948 was not really a viable country. Even Palestine in its entirety has viability problems - especially around water. Expansion into Lebanon to gain control of water resources would definitely make things easier.

_{aspiring to genteel poverty}