"Swales, for example, are shallow channels dug on the contour of a hillside. They slow down the flow of water during rainstorms, preventing it from eroding the landscape, and giving it time to penetrate the soil. Nutrients, in the form of leaves and seeds, are also caught in the swale, contributing mulch and organic matter to the soil. Fruit trees and other crops established in the swale or on its berm can thrive on the captured water and nutrients."
Green streets, Portland, Ore. Constitution_Square
Bioretention planters - Oregon Style
Green Rain Garden Plant List 1. Mugo Pine 2. 'Ice Dance' Japanese Sedge 3. Coastal or Beach Strawberry 4. Blue Fescue 5. Tufted Hair Grass 6. Blue Oat Grass Not Pictured: 7. Evergreen Huckleberry 8. Salal 9. Dagger-leaf or Sword-leaf Rush 10. 'Fireglow' Japanese Maple 11. Kelsey Dwarf Dogwood 12. 'Ice Dance' Japanese Sedge 13. Variegated Lily Turf 14. Black-eyed Susan
Rain Garden | This Old House Online 1. Mugo Pine 2. 'Ice Dance' Japanese Sedge 3. Coastal or Beach Strawberry 4. Blue Fescue 5. Tufted Hair Grass 6. Blue Oat Grass
Rain Garden for Flower Lovers | This Old House Online 1. Red-twig Dogwood 2. Mugo Pine 3. Black-eyed Susan 4. Russian Sage 5. Purple Coneflower 6. 'Autumn Joy' Sedum