We are working on a soccer field, on one side is a new drainage swale it handles all the run off for the entire park (18 acres). We installed a erosion control blanket in the bottom of the swale but with the last rain we lost everything! I mean blanket, seed dirt...... The blanket failed noted by the fragments of blanket left along the way. The swale is 700' long but only the bottom 6' is gone. Any Ideas to solve this delema?