I have to install 1200m of drainage by the side of my airstrip. Will a gravel trench suffice in a clay loam or should I use a pipe as well? - Quora
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DRAIN-SLEEVE Drain-Sleeve with EZ Loader 100-ft L x 4-in W x 4-in dia Pipe Fabric in the Outdoor Drainage Accessories department at Lowes.com
![Amazon.com: Flex-Drain 52003 Flexible/Expandable Landscaping Drain Pipe, Perforated with Filter Sock, 4-Inch by 50-Feet : Industrial & Scientific Amazon.com: Flex-Drain 52003 Flexible/Expandable Landscaping Drain Pipe, Perforated with Filter Sock, 4-Inch by 50-Feet : Industrial & Scientific](https://m.media-amazon.com/images/I/91Yz+Yrxe-L._AC_UF894,1000_QL80_.jpg)