bettyday wrote:
my smallish garden is sloped towards the house and gets like a bog when
it rains. how do I build in some drains for it ?


--
bettyday

In my experience the bogginess is more to do with the type of soil than
the amount of water in it -i.e. a clay soil will get boggy with little
rain whereas a sandy soil may stay quite stable even when very wet.
It's difficult to drain clay from underneath as the rain won't get to
the channels. You'd need to think about diverting the surface water
somehow.