Which of the following materials is considered ineffective for keeping sediment out of catch basins?

Straw bales are considered ineffective for keeping sediment out of catch basins primarily because they can quickly deteriorate when exposed to water and weather conditions. While they may initially provide some filtration, the effectiveness diminishes rapidly as they break down, leading to a situation where sediments can bypass the intended barrier.

In contrast, materials like geo-textiles effectively filter sediments while allowing water to flow through, which helps to manage runoff and prevent sediment accumulation in catch basins. Gravel barriers offer a sturdy structure that can trap larger sediments and are more durable against environmental conditions. Erosion control blankets are designed to stabilize soil and prevent erosion, effectively assisting in sediment control as well. These alternative materials maintain their integrity and performance over time, making them preferable for sediment management in stormwater systems.