A system for removing particulates from liquid and inducing drag in a liquid flow, wherein the system is configured for insertion into a manhole thereby creating a sump region below the system, wherein the system comprises: a partitioning portion positionable above the sump region, wherein the partitioning portion includes: a first region comprising a funnel and a sump inlet aperture; and a second region comprising a sump outlet aperture; a plurality of drag-inducing portions (850a-c) positionable proximate a sidewall of the manhole in the sump region, and wherein the drag-inducing portions (850a-c) project inwardly when installed toward a central axis of the sump region; a first supporting portion; a second supporting portion; a third supporting portion; and a fourth supporting portion; wherein each of the first supporting portion, second supporting portion, third supporting portion and fourth supporting portion are positionable proximate to the sidewall of the manhole in the sump region and comprise: a first drag-inducing portion; a second drag-inducing portion located below the first drag-inducing portion; and a third drag-inducing portion located below the second drag-inducing portion; wherein the first drag-inducing portions, the second drag-inducing portions and the third drag-inducing portions are attached to each of said first to fourth supporting portions (860a-d); and a weir extending upwardly from the partitioning portion and positioned between the first region from the second region. a partitioning portion positionable above the sump region, wherein the partitioning portion includes: a first region comprising a funnel and a sump inlet aperture; and a second region comprising a sump outlet aperture; a first region comprising a funnel and a sump inlet aperture; and a second region comprising a sump outlet aperture; a plurality of drag-inducing portions (850a-c) positionable proximate a sidewall of the manhole in the sump region, and wherein the drag-inducing portions (850a-c) project inwardly when installed toward a central axis of the sump region; a first supporting portion; a second supporting portion; a third supporting portion; and a fourth supporting portion; wherein each of the first supporting portion, second supporting portion, third supporting portion and fourth supporting portion are positionable proximate to the sidewall of the manhole in the sump region and comprise: a first drag-inducing portion; a second drag-inducing portion located below the first drag-inducing portion; and a third drag-inducing portion located below the second drag-inducing portion; wherein the first drag-inducing portions, the second drag-inducing portions and the third drag-inducing portions are attached to each of said first to fourth supporting portions (860a-d); and a first drag-inducing portion; a second drag-inducing portion located below the first drag-inducing portion; and a third drag-inducing portion located below the second drag-inducing portion; wherein the first drag-inducing portions, the second drag-inducing portions and the third drag-inducing portions are attached to each of said first to fourth supporting portions (860a-d); and a weir extending upwardly from the partitioning portion and positioned between the first region from the second region.