Conducting Topographic Survey and development of Basin Information System for Vaigai Basin

Amount

Fixing of Ground Control Point by triangulation on permanent structures using three DGPS with 6 Hrs observation including cost of labour involved in surveying, rental of equipments, transportation charges, post processing charges, Documentation charges, overhead charges etc., complete as directed by WRD officials.

Fixing of Additional Ground Control Point on permanent structures using DGPS with 1 Hr observation including cost of labour involved in surveying, rental of equipments, transportation charges, post processing charges, Documentation charges, overhead charges etc., complete as directed by WRD officials.

Fixing of Bench Mark with 3 Hrs observation on Permanent Structures including cost of labour involved in surveying, rental of equipments, transportation charges, post processing charges, Documentation charges, overhead charges etc., complete as directed by WRD officials.

Taking river Cross Section which includes, but is not limited to, surveying and recording the elevations and coordinates. The river cross section shall be taken perpendicular to the general alignment of the River at every 2 Km longitudinal interval; (i) Every 5 meters above the water level. (ii) Every 2 m below the water level, (iii) at the centre of the river including the water level, (iv) the left and right limits of the river width their invert levels and water levels (v) the top of bank on both left and right sides of the river (vi) the widths of the top of banks on both sides of the river. (vii) Either continuing the cross section surveys for 100 m beyond the embankments on both sides of the river embankments or where there are no embankments extending the survey until the ground level is 2 m above the normal water level of the river. (viii) Taking levels of the irrigation structures including cost of labour involved in surveying, rental of equipments, transportation charges, post processing charges, Documentation charges, overhead charges etc., complete as directed by WRD officials. Note: The river alignment drawing will be given by WRD officials.

Taking tank Cross Section at inlet and outlet of the tank which includes, but is not limited to, surveying and recording the elevations and coordinates. (i) Every 5 meters above the water level. (ii) every 2 m below the water level, (iii) at the centre of the Channel including the water level, (iv) the left and right limits of the Channel width their invert levels and water levels (v) the top of bank on both left and right sides of the Channel (vi) the widths of the top of banks on both sides of the Channel. (vii) Either continuing the cross section surveys for 10 m beyond the embankments on both sides of the Channel embankments (viii) Taking levels of the irrigation structures including cost of labour involved in surveying, rental of equipments, transportation charges, post processing charges, Documentation charges, overhead charges etc., complete as directed by WRD officials.