Perpustakaan Digital ITB

Evaporation and seepage are two commonly occurring phenomena that takes place during water outflow from a pond. The two phenomena are outflows of water from a pond. Evaporation occurs when the water change phase to vapor while seepage happens when water escapes through the porous pond boundaries. However, gaining information on the phenomena may be faced with obstacles caused by limited instrumentation. The objective of this study is to create a mobile based application that can model the phenomena using internet-based weather data storage and standardized soil classification. The application created in this study is meant to give numerical data regarding the evaporation and seepage that occurs within a pond. The parameters used to calculate evaporation rate are solar radiation, wind speed, air pressure, relative humidity and temperature, while soil type, layer, and pond depth are used for calculating seepage rate. The application is able to acquire the necessary parameters for evaporation estimation using only the geographical coordinate and time period of choice with the help of online APIs. The application features data visualization that gives line plot of the evaporation and seepage rate. User may also change the units of the weather information and the numerical results. The software, called Lakesim, is able to estimate evaporation rate that has a RMSE (Root Mean Square Error) of 0.015 mm/day to the actual rate and a correlation of 0.81 with the actual rate.