CLIMATOLOGY IN ARID ZONE RESEARCH 75 
inches 
Albuquerque, New Mexico 
Barahona, Dominican Republic 
Gaza, Egypt 
Zeerust, Union of South Africa 
“ 
O 9 
J FM AMJJ AS ON D J 
©---o Precipitation EEF] Soil Moisture Utilization 
o—— Potential Evapotranspiration SSSN Soil Moisture Storage 
X—-=X Actual Evapotranspiration Water Deficit 
Figure 1. The water budget at four selected stations. 
tion and potential evapotranspiration at four places in arid or 
semi-arid regions of the world. Because of variations in precipita- 
tion at these four places there is a considerable variation in the 
periods of moisture surplus and deficiency which they display. 
At Albuquerque, average precipitation never exceeds 1.§ inches 
