Abstract: An erosion prevention and sedimentation control flow-regulation device and system is provided for all customary applications addressed by conventional filtration devices such as check-dams (ditch check, channel or culvert), inlets (curb and ground), slope (hillside), perimeter control and settling and other ponds. The flow-regulation device and system is comprised of two components: (1) a heavy, irregular-shaped, hard-wearing, non-filtering, high-porosity fill media encapsulated in a heavy-duty, high-tensile mesh (the ‘high-porosity particle mix component’), and (2) an optional sheet-like synthetic geotextile material with limited permeability (the ‘low-permeability choker component’). The high-porosity particle mix component allows much larger flows of water through the device and system. The low-permeability choker component constricts or ‘chokes’ the flow of water into the high-porosity particle mix component.