It is only common sense that if dead storage is not replaced with live storage, reservoir capacity will go on reducing. Optimum regulation of river flows will not be possible, with more water flowing during three months and very little in the remaining nine months, resulting in alternate periods of floods and droughts. There will be less transfer from the wet to the dry period. Uniformity of supplies round the year will not be possible, for agriculture, for industry or for community services. The percent storage of annual river flows will drop below the present low of 9 percent. Hence the per capita, per annum availability of water, already low at 1200 cubic meters, will rapidly drop to the water-scarce level of 1000 Cubic Meters. There will be less reserve for the late Kharif and Rabi seasons where already there is shortage. There will be an appreciable reduction in hydel power except during the three flood months. The present low 30 day contingency reserves will decrease further, making us vulnerable to any natural or man made blockage on our rivers. Without regulation it will not be possible to provide year round protection to the Indus delta. However, increasing our storages will reverse all the above but not in 12 years time but in half that time which is possible only through building Kalabagh Dam. ENGR KHURSHID ANWER, Lahore, October 27.