OCR Text |
Show The total annual revenue from actual M& I releases ( based on the annual yield and reliability) to each demand area from the reservoir in each month of operation, is thus aggregated and then an average annual value computed over the number of years of operation by multiplying by the average reliability over the operation period. Term 2 : Expected Annual Revenue from Irrigation water supply i t Rr 2i % f, i < 5- 2s> i= l r= l where R. 2ir is the unit revenue from Irrigation water supplied to area i at reliability level r, and qfji is the average reliability ( expressed as a probability) of irrigation yield i at reliability level r, for the operation period. The total revenue from actual Irrigation releases ( based on the annual yield and reliability) to each demand area from the reservoir in each month of operation, is thus aggregated and then an average annual value computed over the number of years of operation. Term 3 : Average Annual Net Revenue from hydropower production - NARS, determined from the simulation exercise as a byproduct of the solution for the optimal generator capacity Gs. Term 4: Average Annual Benefits from recreation Benefits from recreation are assumed to accrue as a function of available surface area in any given month at each reservoir. They are expressed as: i X R5s ^ s Ast - ( 5.26) NY where R5S is the recreation benefit per unit area for site s, d3s is 0 ( 1 otherwise) if Ast is less than a minimum area for recreation ASjInm, and Ast is the surface area of reservoir s in month t. The surface area Asj is expressed as: A « = c 7 . S V ' < 5- 27> where c7s, c8s are the coefficient and the exponent of a relationship between surface area and storage. 113 |