Where is azal in Zechariah?

Azal mentioned in Zechariah 14:5 is a valley due south of old Jerusalem that the Arabs call Wadi Yasul, and the Israelis call Nahal Azal. Detailed information about Azal and its discovery can be found at Wordpress.com,">http://zechariahfourteenfive.Wordpress.com, or by searching the internet for zechariah + azal + yasul.