What we did initially was connect the downspout to a long piece of tubing – black, looks like the perf pipe but no perforations – long enough so the end was in the middle of our little front garden. when it rains, some of the runoff was absorbed, some ran off the top, over the retaining wall and onto the sidewalk. When we had our RiverSmart audit, it got the blessing of the auditor. We buried it recently, because it was a total slug farm under the pipe last year. Our front garden is small too – maybe 9′ x 10′.