The book module, although it was not originally designed for this, essentially has a built in linking structure that is conducive to a silo structure. It is included in Drupal core and simply needs to be activated in your modules table.

When you create a book page, you will notice an additional drop down menu called “Parent”. Be default, it is set to “top level”. This allows you to place your content within a hierarchal structure contained within a book or silo.

To create a silo using this method, create your first page with the title of your silo. Leave “parent” set to the default. Choose your taxonomy category. Add your content and Submit.
For your articles, repeat the same as above, except select your silo under the “parent” menu.

Next, you will want to turn on the Book Navigation block by going to Administer > Site Building > Blocks. What this will do is add a navigation menu for all content contained within a book and will only appear on pages within that book, keeping the silo structure clean and organized.

For your silo menus, simply add them to your primary menu or create a separate block for them.