Equally, the Nile River headwaters originate outside the ESCWA region and serves as the primary source of freshwater for Egypt and the Sudan, the latter of which under-consumes its water allocation, thereby allowing additional supplies to flow to Egypt. While Lebanon shares several river basins with its neighbours, relatively high precipitation rates, short river courses and snowmelt generally provide the country with sufficient water supplies. Climate change is expected to have adverse impacts on these shared water resources. These include wastewater treatment and reuse, agricultural runoff reuse and desalination.