Abstract:
Hydrometeorological data are important for many fields and application involving movement and distribution of water which include hydrological modelling, design of hydraulic structures, flood prediction, navigation and water management. The activity of collecting, processing and analyzing hydrometeorological data attracts hydrologists, meteorologists and other scientists which deal with water and its circulation. The hydrometeorological observations were carried out daily using UNESCO-IHE roof weather station, Delft, the Netherlands for a period of 8 days from 17th April to 24th April 2007. Two main types of instruments used are single reading (such as rain gauge and counting anemometer) and continuous reading (such as thermoghraph and data logger). Data from continuous reading instruments only could be obtained on the last day of observation periods. These observations summarize the final results obtained after processing of the raw data of temperature, rainfall, relative humidity, sunshine duration (n/N), solar radiation and wind speed. Then, compare them with the past weather in April in the Netherlands (from the literature). From the result analysis, it can be summarized that Potential Evapotranspiration (PET) calculation by Penman-Monteith method has showed the same trendline with PET Makkink. The observations period was dry compared with the past weather in April. The maximum temperature of 24.8 degree Celcius and radiation of 789.89 W/m2 were comparatively higher than the temperature and radiation of the past weather. The rise of temperature and solar radiation can be a first estimation of climate change indication.
