My organic traffic has died!! Why?

[ProsperoDigital]

Hi there, I have recently updated this website, as in new design, new URL structure, the works. The old site before I introduced the new site was doing well, as in up and down around 2 000 visitors a day. The site sort of started to go a bit down the slightest bit just before we launched the new site on the same domain but nothing of any concern. We 301ed all the old URLs to their corresponding URL structure as to keep most of the link juice from the old site, however with the new site going live the begining of this month June 2014, till now the site has dropped off to just 200 per day. I have been searching high and low for an answer and have been comming up blank.

Why could this have happened, what did I do incorrectly?  www.zulu.org.za

[DeanAndrews]

Just a very quick look for my penny's worth: The 'Read More' links on this page http://www.zulu.org.za/archive are then being 301 redirected rather than then new URL being used on the 'Read More' also some of the archive pages do not appear have any copy in such as http://www.zulu.org.za/index.php?view_page+180295

The sitemap link in the page footer 404's

The contact us in the page footer (http://www.zulu.org.za/contact-us) is redirected to http://www.zulu.org.za/archive/contact-us-F30503