Hydrologic Input-Output Model of Mt. Isarog Watersheds

Mathematical modelling is one way of studying the effects of climate change in different parts of this world. This investigated the hydrologic condition of watersheds with focus on examining the hydrologic input-output situation in Mt. Isarog. Specifically, the following were answered: to delineate and describe the watershed areas and boundaries; to analyse the precipitation and river discharges behaviour on several portions of the mountain by mathematical modelling. Remote sensing, GIS map reading and satellite fed data for last three years were utilized. The basic formula was used to arrive in mathematical modelling for discharge. Computer excel programming was applied for statistical analysis employing both t-test and ANOVA. The study found the watersheds to be characterized in different areas, location, boundaries and precipitation which were found as factors affecting discharges of rivers. The precipitations for the last three years were used to arrive at different mathematical models, trend lines and slopes. The mathematical models, computed discharges, trend lines and slopes for every river vary with each other. The mathematical models were found useful in describing river discharges in the area. The obtained data may be used in projecting the future precipitation and river discharges which is useful to different sectors of the society engaged in agriculture, forecasting, administering irrigation system, construction, environmental awareness, and many more.

Keywords – Mathematical models, hydrology, watershed, water discharge, Mt. Isarog.