This short but excellent brochure explains everything about sand dams.
EXCELLENT (2012): Sand Dams: The World's most Cost-Effective Method of Conserving Rainwater. Brentford: Excellent PDFThis short but excellent brochure explains everything about sand dams.
EXCELLENT (2012): Sand Dams: The World's most Cost-Effective Method of Conserving Rainwater. Brentford: Excellent PDF