I am wondering about the viability of installing swales in clay soils. Several folks in northeastern Missouri are wondering about this. Just reading the landscape, we see any little depression becomes a pond with a little rainfall--seems like it evaporates before it soaks in. How can we get this water to infiltrate? I am thinking mulch, the answer to everything, but I am hesitant to recommend swales at all until I hear from someone with experience that it works and doesn't just make a giant standing-water problem. Thanks.