The present invention generally relates to a cost-effective and simple river training system for a fluvial inland water body which is focused on use of locally available natural eco-friendly cheaper material along with ease of installation in a large alluvial river. As per literature, the river training system comprises a flow-training arrangement having plurality arrays of several submerged vane component members to be laid out along transverse and longitudinal directions of flow as per site-specific designs. Each array comprises required submerged vane component members transversely for effecting desired flow-training function. These arrays of submerged vanes component members are to be repeated in longitudinal direction at designed space intervals. As detailed in the literature, the underlying hydraulic principle of submerged vanes helps to modify the water flow pattern by generating secondary vortex currents to divert sediment carrying bottom flow layers outward to the eroded banks to induce sedimentation, while the clear water upper layers are deflected inward to the mid-stream to achieve channel deepening for required inland navigation fairway draught. In the present invention, the submerged vane structure is to be fabricated using naturally available bamboo/'balli' or wooden piles. These piles constituting the submerged vanes are arranged to stand vertical to the river bed and are installed in close contact with each other, even though hydraulically the submerged vane as a whole is not required to be water-tight or impervious, but not permitting active flow filaments to pass through the micro pore spaces between submerged vane bamboo/'balli'/wooden piles. The river training or erosion control system additionally comprises an installation means with simple water jetting or using divers for embedding the flow-training arrangement into the river bed of the fluvial inland water body. The river training and/or erosion control system is installed along the channel cross section of the inland water body and makes an angle of 10 300 with the incoming water flow. Also, the height of the flow-training arrangement above the river bed varies from 20 to 40 percent of the total height of the maximum bankfull flow depth during floods as per site-specific designs. In contrast to manufactured high cost steel plated or concrete slabs submerged vanes used elsewhere, the submerged vanes in the present invention are made of cheaper natural Bamboo/'Balli'/Wooden pile material. These naturally available Bamboo/'Balli'/Wooden pile materials are to be implemented as cost-effective and eco-friendly river training measures that are logistically suitable for extensive river lengths for inland navigation channel development & maintenance, and also for stream bank erosion protection on a longer term sustainable basis. Flow-training arrangement 102 Pluralityofmembers104 Installationmeans106 Waterjettingmeans108 Figure Flow am boo Wooden Pile Plan Flow op Rver ed Level Longitudinal Elevadon atA-A Figure