Need help with our Gutter Drainage Erosion Issue
Hi, we live on a shadded sloped lot with a backyard that boarders the woods. Where our property boarders the woods is a very steep drop off that drops down into a valley with a stream below.
The back of the house has two gutter downspouts. We have noticed that we have a soil errosion issue. Due to the shade we don't get really thick grass and then the heavy rain comes out of gutter downspouts and rushes down the lawn to the steep drop off and the water has now taken most of the topsoil away, leaving us unable to grow grass and creating a bigger erosion issue.
My first thought was to put down river rock and create a dry river bed where the gutter downspouts are in order to stop the rain water from rushing down our lawn and instead seep into the dry river bed.
We had some landscapers come out to look at the yard (give us quotes for solving the erosion issue, topsoil, seeding, etc).
I mentioned the dry river bed and one landscaper said they were a lot of upkeep. I would have to clean them out and the rocks sink into the ground and I would have to lift them back every so often.
Both landscapers I talked to instead suggested that I install PVC downspout drainage underground and have it discharge right into the woods.
My concern with this is that we already have an erosion issue...won't I have a big erosion issue where the pipe discharges, especially if it is discharged onto a steep drop off. I don't want to start loosing our property line as well.
Any suggestions. What what would be the best option? We don't have an issue with water in the basement at all...instead we have an issue with water rushing away from the house and taking our lawn/dirt with it.