JUSTIFICATION OF THE DAILY CONSUMPTION REGIME, BALANCING STORAGE AND BLENDING RATIO IN AN INTER-REGIONAL WATER TRANSFER SYSTEM

Abstract

The daily water consumption regime of the districts and towns of the Andijan and Fergana regions located along the Kampirravat – Fergana inter-regional water transfer system is analysed. Using rural- and urban-type demand patterns and a two-step supply schedule (2.5/4.5 %), the balancing storage volumes are determined: 7.82 % of the daily demand for rural-type consumers, 4.58 % for Fergana city and 5.73 % for Margilan city. Hourly flows for consumer groups and balancing volumes for different supply schedules are calculated, and the total reservoir volume for Fergana city is justified. For blending Kampirravat water (hardness 2.1–6.1 meq/l) with groundwater (8.5–14 meq/l), the minimum share of Kampirravat water ensuring the standard hardness is obtained from a mass balance (46 % for the Pakana–Logan well field and 71 % for the hardest sources).