RAINFALL AND FLOW VARIATION IN CÂLNĂU’S WATERSHED
Diana A. GIURGIU
ABSTRACT. - Rainfall and flow variation in Câlnău’s watershed. Changes inflicted on the evolution of climate parameters such as temperature, rainfall, snow depth etc. represent a critical point in conducted studies, because of the increasing number of extreme events from one season to another. At the same time, hydrological aspects must be taken into consideration, because in the river’s drainage system significant changes have also been recorded, such as the frequency of reaching or exceeding high flows values on record. The correlation between climate and hydrological aspects shows an overview of how they interact. This helps us analyze feedback processes and how they affect the evolution of a river over a period of time. Duration, intensity and frequency are key characteristics for the analyzed parameter, because they emphasize the response time. The overall objective of the study is two folded. On one hand, it can highlight periods of a year with high or low levels of flow rate, more precisely periods likely or not to produce flood phenomena and their extent: overrunning or not the three levels of alert. On the other hand, there is the situation of identifying the wettest years as compared to the driest ones and the connection with the general context available for Romania for those years, or on the contrary obtaining some local circumstances - specific for Câlnău’s watershed. Such an analysis is always welcome, especially for underlining the flood phenomena, which represent a major socio-economic threat, because damage before such dangers are considerable, from crops destruction to deaths among humans.
Keywords: watershed, flow, rainfall, temperature, climate