I often observe that some houses have a strip of lawn adjacent to the foundation removed, and replaced with pebbles, river stone or alike. I understand this does not serve only decorative purpose.
Which Types of Gravel are Best for French Drains?
9 Ideas for River Rock Landscaping - Saunders Landscape Supply
How to Use Rock and French Drains to Keep Your Basement Dry - Tigard Sand & Gravel LLC
What is the best landscaping material next to my foundation? - Home Improvement Stack Exchange
How To Manage Drainage and Runoff With Paver Landscaping
How Your Landscape Drainage System Affects Subsidence–For Good Or Bad
French Drains: A Complete Homeowner's Guide - Bob Vila
How To Properly Add Drainage To Your Retaining Wall - DIY Retaining Wall®
river rock in the landscape means no water
9 Landscaping Tips to Prevent Basement Flooding
River Rock Installation What Not To Do – Otosection
Flagstone: what to use, sand, cement, or gravel?
How to Landscape With River Rock
Types of Landscaping Rocks and How to Use Them - This Old House