An Analysis Of Rainfall And Floods In The Pampanga River Basin (1946-1966)

Cipriano C. Ferraris

This is a study of rainfall and flood parameters for the period 1946 to 1966 over the Pampanga River Basin to find relationships between rainfall amount and flood height, weather systems and flood occurrence, flood magnitude and frequency of recurrence and between maximum flood flow and drainage area. Also analyzed are the annual variation of peak flood stages.

An Analysis Of Manila Rainfall Data

Aida M. Jose

Statistical parameters of Manila rainfall data are computed and examined using 105 years of record (1865-1969). Variability of the rainfall is high and the distribution is positively skewed. It is shown also that long periods of Manila rainfall records are necessary to stabilize the values of mean and standard deviations for both dry and wet months. Analysis of the variation of 5-term binomially weighted averages of twelve months rainfall indicates long period oscillations of 33 to 43 years irregular shorter period oscillations of 5 to 11 years.

An Analysis Of Potential Evapotranspiration And Evaporation Records At Los Baños, Laguna, Philippines

Mariano T. Asuncion

Different techniques for estimating potential evapotranspiration or evaporation plus actual evapotranspiration have been reviewed and some were tested using readily available meteorological and astronomical data at the College Weather Station, University of the Philippines, College of Agriculture, Los Baños, Laguna. Experimental evidence lends the most support to the Penman formula as the best empirical method for calculating potential evapotranspiration which has also has a more sound physical basis than most others.