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The Role of Monthly Updated Climate Forecasts in Improving Intraseasonal Water Allocation
 

Summary: The Role of Monthly Updated Climate Forecasts in Improving Intraseasonal
Water Allocation
A. SANKARASUBRAMANIAN
Department of Civil, Construction, and Environmental Engineering, North Carolina State University, Raleigh, North Carolina
UPMANU LALL
Department of Earth and Environmental Engineering, Columbia University, New York, New York
NARESH DEVINENI
Department of Civil, Construction, and Environmental Engineering, North Carolina State University, Raleigh, North Carolina
SUSAN ESPINUEVA
Philippine Atmospheric, Geophysical and Astronomical Services Administration, Quezon City, Philippines
(Manuscript received 22 September 2008, in final form 4 January 2009)
ABSTRACT
Seasonal streamflow forecasts contingent on climate information are essential for short-term planning
(e.g., water allocation) and for setting up contingency measures during extreme years. However, the water
allocated based on the climate forecasts issued at the beginning of the season needs to be revised using the
updated climate forecasts throughout the season. In this study, reservoir inflow forecasts downscaled from
monthly updated precipitation forecasts from ECHAM4.5 forced with ``persisted'' SSTs were used to im-
prove both seasonal and intraseasonal water allocation during the October­February season for the Angat
reservoir, a multipurpose system, in the Philippines. Monthly updated reservoir inflow forecasts are ingested
into a reservoir simulation model to allocate water for multiple uses by ensuring a high probability of meeting

  

Source: Arumugam, Sankar - Department of Civil, Construction, and Environmental Engineering, North Carolina State University

 

Collections: Environmental Sciences and Ecology; Engineering