Netherlands' Crown Prince Willem-Alexander, Prince of Orange, arrived here today to attend the opening of the 3rd International Conference of Water Resources and Arid Environment 2008 as well as the 1st Arab Water Forum and the handing over award ceremony of Prince Sultan bin Abdulaziz International Award for Water. At Riyadh Air Base, he was received by Prince Khalid bin Sultan bin Abdulaziz, Assistant Minister of Defense and Aviation and Inspector General for Military Affairs and a number of officials.