drainage drainage reclamation channel is an outdated way to lower groundwater levels. dikes of gray stones. supplies water to irri

autumn bend central channel concrete damage dikes dirty drainage drains europe factory fields flood flow garnish grass gray groundwater heavy irri irrigate landscape landscaping lawn levels lower lush meander mirror muddy narrow nature outdated outdoor overgrown park pond quickly rain rainy reclamation reflection reinforcements river riverbed roads rock roof sewage slope slopes steep stone stones storm straight stream supplies transport tube waste water waterfall way