PROBLEM OF SILTATION IN UPPER GANGA CANAL

Abstract

For the first time, in more than a century, the upper Ganga Canal experienced heavy silting in the last week of July and early August 19 70 . This was due to hill slides in Alakh-nanda Valley.. The canal was unable to take its discharge and heavy silt clearance had to be carried out. The problem of silt deposition is still continuing. The hydraulics of sediment transport is still irnper-fectly known. The phenomenon of silt deposition, scouring and movement of silt in Ganga Canal was found to be highly com-piex . However, guide lines for canal operation have been fram-ed taking case of the health of the canal and minimising the closure period. Closure of canal means loss of irrigation water and power-generation. while studying the problem some interest-ing results have been obtained.