Infiltration trenches or galleries consist of a network of trenches located several feet below the frost line with perforated pipes to let water infiltrate throughout the subsurface. The system could be constructed with backhoe excavation, a geosynthetic drainage net, and slotted pipe. Installation with a trencher and flexible pipe is another option. The primary functional difference between infiltration trenches and reinjection wells is that infiltration trenches deliver water to the vadose zone; while reinjection wells inject water into the aquifer. This arrangement buffers groundwater both from changes in the quantity and chemistry of reinjected water. Trenches percolate water at a low enough velocity that sand grains would not be rearranged. This means that trenches can function over long periods of time with little need for maintenance.