De or het solorivier?

The correct Dutch article is:

de solorivier

How to use solorivier

the solorivierde solorivier
this solorivierdeze solorivier
that solorivierdie solorivier
our solorivieronze solorivier
your solorivierjouw solorivier
every solorivierelke solorivier
which solorivier?welke solorivier?
a big solorivier / the big soloriviereen grote solorivier, de grote solorivier