12/27/2024
Seasonal Drainages
During the rainy season this farmer had problems with water backing up their culvert and spreading across their fields. They had cattle grazing grasses on one side of the seasonal drainage and on the other side a stand of closed canopy thicket. The original drainage would have a sheet flow effect across roots and wetland plants, slowing down water and retaining soil. Since the farmer cut back these trees and shrubs and let the grasses and forbes come up for cattle grazing this seasonal drainage has now become a washed out, bedrock exposed, path of least resistant watershed straight towards the culvert below. As the culvert would back up with sticks and jam up with leaf debris, they’d need to prioritize reopening these points for adequate flow during certain times of the year.
The structures you see here, built below in the eroded channel, are referred to as Post Assisted Log Structures (PALS). These are built from natural materials found on-site to help slow the rate of stream bank erosion, capture any washed out leaf debris, and retain water in the channel rather than it flowing into the farmers pastures. Over time, with proper management, these structures will capture sediment and build soils, creating habitat for diverse plant species and bring back a natural sinuosity.
Seasonal drainages, like the one pictured here, can have severe impacts on aquatic life down stream if not managed correctly.
Give Habitat Solutions LLC a call if you’re having similar issues at (740) 621-0894 or send an email at [email protected]